You're reading the pure-python version of operator.py. You get the builtin versions of the same functions - not the python functions when you use it - see the i

You're reading the pure-python version of operator.py. You get the builtin versions of the same functions - not the python functions when you use it - see the import of _operator further down the file. Also verify the type info on the object here: In [1]: import operator In [5]: operator.add?? Signature: operator.add(a, b, /) Docstring: Same as a + b. Type: builtin_function_or_method