Strange PEP8 recommendation on comparing Boolean values to True or False

Question

At the end of python PEP8 I\'m reading:

• Don\'t compare boolean values to True or False using ==

  Yes:   if greeting:
  No:    if g         
  
  
          

Answer 1

I usually name my boolean variables after the pattern IsName, so in you case IsGreeting. This makes the check read if IsGreeting/if not IsGreeting, which is very intuitive.

The ambiguities you are describing with if not are the result of using non-boolean types in boolean comparisons. This should usually be avoided, as it is very confusing.