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  1. from collections import deque
  2.  
  3. class MessageDeque(deque):
  4.     def append(self, item):
  5.         dropped_message = self.popleft() if len(self) == self.maxlen else None
  6.         super(MessageDeque, self).append(item)
  7.         if dropped_message:
  8.             raise MemoryError(dropped_message)
  9.  
  10. m = MessageDeque(maxlen=2)
  11. m.append("hello")
  12. m.append("goodbye")
  13. m.append("aloha")
  14.  
Runtime error #stdin #stdout #stderr 0.01s 24568KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
Traceback (most recent call last):
  File "prog.py", line 13, in <module>
  File "prog.py", line 8, in append
MemoryError: hello
https://ideone.com/iZjjRz
language:
Python (cpython 2.7.16)
created:
8 years ago
visibility:
secret

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