Class must implement all abstract methods

Reports cases when not all abstract properties or methods are defined in a subclass.

Example:

from abc import abstractmethod, ABC


class Figure(ABC):

    @abstractmethod
    def do_figure(self):
        pass


class Triangle(Figure):
    def do_triangle(self):
        pass

When the quick-fix is applied, the IDE implements an abstract method for the Triangle class:

from abc import abstractmethod, ABC


class Figure(ABC):

    @abstractmethod
    def do_figure(self):
        pass


class Triangle(Figure):
    def do_figure(self):
        pass

    def do_triangle(self):
        pass

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

-PyAbstractClass

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Python

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection -PyAbstractClass

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025