access-member-before-definition / E0203

Message emitted:

Access to member %r before its definition line %s

Description:

Used when an instance member is accessed before it's actually assigned.

Problematic code:

class Unicorn:
    def __init__(self, fluffiness_level):
        if self.fluffiness_level > 9000:  # [access-member-before-definition]
            print("It's OVER-FLUFFYYYY ! *crush glasses*")
        self.fluffiness_level = fluffiness_level

Correct code:

class Unicorn:
    def __init__(self, fluffiness_level):
        self.fluffiness_level = fluffiness_level
        if self.fluffiness_level > 9000:
            print("It's OVER-FLUFFYYYY ! *crush glasses*")

Created by the classes checker.