What exactly are “containers” in python? (And what are all the python container types?)

Question

The python documentation frequently speaks of \"containers\". E.g. :

If check_circular is False (default: True), then the circular reference check f

Answer 1

Container are all python objects that contain other object like list or dict. The Container type is an ABC, it behave like an interface. A Container is a class that implements the __contains__ method.

Here is the doc