Pylint warning for "useless super delegation"

Question

Pylint raises the warning: Useless super delegation in method '__init__' (useless-super-delegation) for the SpecificError class below.

class MyProjectExceptions(Exception):
    """The base class for all my project's exceptions."""
    def __init__(self, message, func):
        super(MyProjectExceptions, self).__init__(message)  # Normal exception handling
        self.func = func  # Error origin for logging

class SpecificError(MyProjectExceptions):
    """Raise when a specific error occurs."""
    def __init__(self, message, func):
        super(SpecificError, self).__init__(message, func)

What is the correct way to pass the parameters to the superclass here?

Answer 1

If you call the SpecificError class it will look for an __init__. If it doesn't exist it will call the parent's __init__. There is no need to add an __init__ here, since it's exactly the same like the parent class. It is basically code duplication.

You should do:

class SpecificError(MyProjectExceptions):
    """Raise when a specific error occurs."""
    pass