Abstract method not overridden PYL-W0223
Bug risk
Major
5 months ago
—
4 years old
Method 'python_type' is abstract in class 'TypeEngine' but is not overridden
39
40
41def sqlite_datetime_fix():
42 class SQLiteDateTimeType(types.TypeDecorator):43 impl = types.Integer
44 epoch = datetime(1970, 1, 1, 0, 0, 0)
45Method 'process_literal_param' is abstract in class 'TypeDecorator' but is not overridden
39
40
41def sqlite_datetime_fix():
42 class SQLiteDateTimeType(types.TypeDecorator):43 impl = types.Integer
44 epoch = datetime(1970, 1, 1, 0, 0, 0)
45
Description
A method marked with @abstractmethod is not defined in the concrete class. This can result in unintended behavior.
It is recommended to implement all abstract methods in the derived classes.
Bad practice
from abc import ABC, abstractmethod
class Vehicle(ABC):
@abstractmethod
def start():
pass
class Car(Vehicle):
# No overridden `start` method here. Can cause unintended behavior
def stop():
self.speed = 0
Recommended
from abc import ABC, abstractmethod
class Vehicle(ABC):
@abstractmethod
def start():
pass
class Car(Vehicle):
def start():
self.speed = 3
def stop():
self.speed = 0