literal-comparison / R0123

Message emitted:

In '%s', use '%s' when comparing constant literals not '%s' ('%s')

Description:

Used when comparing an object to a literal, which is usually what you do not want to do, since you can compare to a different literal than what was expected altogether.

Problematic code:

def is_an_orange(fruit):
    return fruit is "orange"  # [literal-comparison]

Correct code:

def is_an_orange(fruit):
    return fruit == "orange"

Related links:

• Comparison operations in Python

Created by the basic checker.