ValueError: max() arg is an empty sequence

Question

I\'ve created a GUI using wxFormBuilder that should allow a user to enter the names of \"visitors to a business\" into a list and then click one of two buttons to return the

Answer 1

in one line,

v = max(v) if v else None

>>> v = []
>>> max(v)
Traceback (most recent call last):
  File "", line 1, in 
ValueError: max() arg is an empty sequence
>>> v = max(v) if v else None
>>> v
>>>