Traceback (most recent call last):
File "/usr/lib/python3.5/random.py", line 262, in choice
i = self._randbelow(len(seq))
File "/usr/lib/python3.5/random.py", line 239, in _randbelow
r = getrandbits(k) # 0 <= r < 2**k
ValueError: number of bits must be greater than zero
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "./prog.py", line 19, in <module>
File "./prog.py", line 17, in choose
File "./prog.py", line 17, in choose
File "./prog.py", line 8, in choose
File "/usr/lib/python3.5/random.py", line 264, in choice
raise IndexError('Cannot choose from an empty sequence')
IndexError: Cannot choose from an empty sequence