Help on class Container in module collections.abc:

class Container(builtins.object)
 |  Methods defined here:
 |
 |  __contains__(self, x)
 |
 |  ----------------------------------------------------------------------
 |  Class methods defined here:
 |
 |  __subclasshook__(C) from abc.ABCMeta
 |      Abstract classes can override this to customize issubclass().
 |
 |      This is invoked early on by abc.ABCMeta.__subclasscheck__().
 |      It should return True, False or NotImplemented.  If it returns
 |      NotImplemented, the normal algorithm is used.  Otherwise, it
 |      overrides the normal algorithm (and the outcome is cached).
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes defined here:
 |
 |  __abstractmethods__ = frozenset({'__contains__'})

Help on class Container in module collections.abc:

class Container(builtins.object)
 |  Methods defined here:
 |
 |  __contains__(self, x)
 |
 |  ----------------------------------------------------------------------
 |  Class methods defined here:
 |
 |  __subclasshook__(C) from abc.ABCMeta
 |      Abstract classes can override this to customize issubclass().
 |
 |      This is invoked early on by abc.ABCMeta.__subclasscheck__().
 |      It should return True, False or NotImplemented.  If it returns
 |      NotImplemented, the normal algorithm is used.  Otherwise, it
 |      overrides the normal algorithm (and the outcome is cached).
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes defined here:
 |
 |  __abstractmethods__ = frozenset({'__contains__'})

>>> from collections import Container