Some functions in Python standard library have (optional) keyword argument(s), but using them in the form of keyword arguments is optional , e. g. enumerate(iterable, start=1) # as keyword argument and enumerate(iterabele, 1) # as positional argument are both correct. But others explicitly forbid using their optional keyword arguments as positional, e. g. sorted(): sorted(iterable, *, key=None, reverse=False) Return a new sorted list from the items in iterable. Has two optional arguments which must be specified as keyword arguments. (See also PEP 3102 - Keyword-Only Arguments.) Why such decision for only few keyword arguments? What would be bad with such (incorrect) use: sorted(strings_list, len, True) # Incorrect, but why not allowed? Continue reading...
