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Pattern: Use of equality comparison for singleton object

Issue: -

Description

Comparisons to the singleton objects, like True, False, and None, should be done with identity, not equality. Use is or is not.

Example of incorrect code:

if var != True:
    print("var is not equal to True")
if var == None:
    print("var is equal to None")

Example of correct code:

if var is not True
    print("var is not True")
if var is None
    print("var is None")

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