use-eq-for-primitives

Collection: fixit-extra Autofix: Yes Python: Any

Enforces the use of == and != in comparisons to primitives rather than is and is not. The == operator checks equality, while is checks identity.

Message

Don’t use is or is not to compare primitives, as they compare references. Use == or != instead.

References

• object.eq

• is operator

Valid examples

a == 1

a == '1'

a != '1'

'3' == '1'

3 == '1'

3 > 2 > 1

Show more

3 > 2 > '1'

a is b > 1

a is b is c

1 > b is c

Invalid examples

a is 1

Suggested fix

a == 1

a is '1'

Suggested fix

a == '1'

a is f'1{b}'

Suggested fix

a == f'1{b}'

Show more

a is not f'1{d}'

Suggested fix

a != f'1{d}'

1 is a

Suggested fix

1 == a

'2' > '1' is a

Suggested fix

'2' > '1' == a

3 > a is 2

Suggested fix

3 > a == 2

1  is   2

Suggested fix

1  ==   2