Having the same implementation in every branch of an if chain is an error. Either a copy-paste error was made and something different should be executed, or there shouldn't be an if chain at all.

Noncompliant Code Example

if b == 0:  # Noncompliant
    doOneMoreThing()
elif b == 1:
    doOneMoreThing()
else:
    doOneMoreThing()

b = 4 if a > 12 else 4  # Noncompliant

Exceptions

This rule does not apply to if chains without else-s.

if b == 0:  # no issue, this could have been done on purpose to make the code more readable
    doOneMoreThing()
elif b == 1:
    doOneMoreThing()