By contract, every Python function returns something, even if it’s the None value, which can be returned implicitly by omitting the
return statement, or explicitly.
The __init__ method is required to return None. A TypeError will be raised if the __init__
method either yields or returns any expression other than None. Returning some expression that evaluates to
None will not raise an error, but is considered bad practice.
Noncompliant Code Example
class MyClass(object):
def __init__(self):
self.message = 'Hello'
return self # Noncompliant
Compliant Solution
class MyClass(object):
def __init__(self):
self.message = 'Hello'
