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import collections
 
class PrintOnDelDict(collections.UserDict):
    def __delitem__(self, key):
        item = self.pop(key)
        print(item)
 
x = PrintOnDelDict()
x[1] = 2
del x[1]

Runtime error #stdin #stdout #stderr 0.2s 24320KB

stdin

Standard input is empty

stdout

Standard output is empty

stderr

Traceback (most recent call last):
  File "./prog.py", line 10, in <module>
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
  File "/usr/lib/python3.7/_collections_abc.py", line 801, in pop
    del self[key]
  File "./prog.py", line 5, in __delitem__
RecursionError: maximum recursion depth exceeded

https://ideone.com/jFwOWh

language:

Python 3 (python 3.12)

created:

visibility:

public

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