Can you explain what the collections.abc module in Python is and what role it plays?

The collections.abc module in Python contains abstract base classes (ABCs) for collections, such as Iterable, Sequence, Mapping, and others.

It is used to define collection interfaces and to check whether an object implements a specific collection protocol. This helps create more flexible and understandable code, focused on object behavior rather than their specific type.

For example, you can check if an object is iterable:

from collections.abc import Iterable

print(isinstance([1, 2, 3], Iterable))  # True
print(isinstance(42, Iterable))         # False

You can also create your own classes inheriting from the appropriate ABCs to ensure the implementation of necessary methods.