Python Error: 'cannot import name 'Self' from 'typing_extensions'' - Solution and Explanation

This error occurs when you attempt to import the 'Self' type from the 'typing_extensions' module, but it's absent in your current 'typing_extensions' version.

The 'Self' type is commonly used in type hints to define recursive type annotations, where a class refers to itself within its own type hint.

To resolve this error, you have two options:

1. Upgrade 'typing_extensions': Update the 'typing_extensions' package to a version that includes the 'Self' type.

2. Utilize the built-in 'typing' module: Replace the import statement:

from typing_extensions import Self

with:

from typing import TypeVar

Self = TypeVar('Self')

This defines a type variable 'Self' that you can use within your type hints.