Some cases classes should not call the constructor of their super class, like those inherited from abstract classes:
class Father:
def __init__(self):
pass
class Son(Father):
def __init__(self):
self.salary = 700
def __repr__(self):
return f"my salary is {self.salary}"
print(Son())
Still, my legacy code contains a linter that complains about that:
$ pylint3 --disable=too-few-public-methods,missing-docstring main.py
No config file found, using default configuration
************* Module main
W: 5, 4: __init__ method from base class 'Father' is not called (super-init-not-called)
Is there any way to convey this fact to pylint?
If the Father class is abstract you should not have an __init__ (well except if the init does something then you should call it) and you can explicitly make it inherits from ABC like this:
import abc
class Father(abc.ABC):
@abc.abstractmethod
def interface(self):
...
class Son(Father):
def __init__(self):
self.salary = 700
def __repr__(self):
return f"my salary is {self.salary}"
def interface(self):
print(repr(self))
class BadSon(Father):
"""interface not implemented here"""
print(Son())
print(BadSon())
pylint understands what's going on:
a.py:26:6: E0110: Abstract class 'BadSon' with abstract
methods instantiated (abstract-class-instantiated)
But when you launch with python there's an error too:
my salary is 700
Traceback (most recent call last):
File "b.py", line 26, in <module>
print(BadSon())
TypeError: Can't instantiate abstract class BadSon with abstract methods interface