import _collections_abc

Importing `_collections_abc` directly into your code is not recommended as it's an internal module meant for implementation details and not intended for direct use by end-users[^2]。In Python, you typically import `collections.abc` instead, which provides access to abstract base classes (ABCs) defined in the `_collections_abc` module[^1] but with a more user-friendly interface.

When you write `from collections import abc`, you're importing the subset of ABCs that are part of the standard library, like `Iterable`, `Hashable`, etc., that can be used for designing your own generic classes or verifying if an object adheres to certain interfaces.

If you encounter an error about `TypeError: ‘type’ object is not subscriptable` when trying to import `_collections_abc`, it means you've attempted to treat a type object (like `type`) as if it were a sequence, which it isn't. This issue usually occurs when there's a problem with the site module initialization.

To summarize, the correct way to work with abstract base classes in Python is through `collections.abc`, not `_collections_abc`.