Steven D'Aprano added the comment: To be clear, I'm referring to the docs in the tutorial: https://docs.python.org/3.7/tutorial/datastructures.html and the docstrings as well as the library reference: https://docs.python.org/3.7/library/stdtypes.html#sequence-types-list-tuple-... The library reference already notes that `remove` uses equality, but the others do not. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue29756> _______________________________________