Special method question

While I was reading next() function, some line said that next function invokes


in iterator object.

Then I guess maybe those special methods are what give the types what define them. Like int type has __add__ method that allows them to be added with arithmetic symbols and list withi __contain__ that allows to be searched using index.

Is this guess right?

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Yes. All functions that come with Python have a similar type of operation under the hood.

You can always check what they are with a dir() call.

['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__', '__hash__', '__iadd__', '__imul__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__', '__rmul__', '__setattr__', '__setitem__', '__sizeof__', '__str__', '__subclasshook__', 'append', 'clear', 'copy', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']