Pythonic way to check if: all elements evaluate to False -OR- all elements evaluate to True

Question

I want the results of the function to be:

• All values evaluate to False (None, 0, empty string) -> True
• All values evaluate to True -> True
• Every

Answer 1

Not so brief, but shortcuts without messing around with 'tee' or anything like that.

def unanimous(s):
   s = iter(s)
   if s.next():
       return all(s)
   else:
       return not any(s)