Python equivalent of the ! operator

For the following construct what can the more pythonic way?

If it were C 开发者_Python百科I could just use ! but what is it equivalent in Python?

file_path = # something 
if os.path.exists(file_path):
     pass
else:
  file_path = # make new path 

file_path = # something 
if not os.path.exists(file_path):
     file_path = #make new path

Python Docs - Expressions - 5.1 Boolean Expressions

The not keyword.

if not os.path.exists(file_path):
    file_path ...

Simply:

file_path = # something 
if not os.path.exists(file_path):
    file_path = # make new path 

Operator not is also in C++, btw, as a synonym for !.