Python double under (dunder) methods

Dunder stands for "double +‎ under" methods

__init__
__str__
__call__
__setitem__
__getitem__
__delitem__
__len__
__add__
__contains__
__repr__

Related

• Methods
• Classes
• Double underscore
• Class methods
• Python, C
• Polymorphism
• _xxxx and __xxxx. Read https://docs.python.org/3/tutorial/classes.html#private-variables
• from os import open as open_
• Underscore
• if __name__ == "__main__":

Activities

• http://python-history.blogspot.com/2009/02/adding-support-for-user-defined-classes.html
• What is the difference between __str__ and __repr__?

See also

• Python, PIP, GIL, Flask, Django, Marshmallow, def, logging, Pandas, Numpy, AWS Chalice, import, from, tuple, list, Python exceptions, virtualenv, .append, pytz, TZ, print, python3 -c, os, PEP, Python Institute, Methods: Dunder methods, Flake8, Python collections, Function decorators in Python, Click python library, Python module, Flower, kwargs, Black (Python), Python list structure, Mypy, variables, Casting, try:, pydoc, argparse, Anaconda, pyenv, setup.py, python3 --version, python3 --help, Data Classes, raise