python not accept keyword arguments

Question

I am trying to make my code NOT to accept keyword arguments just like some bulitins also do not accept keyword arguments, but, I am unable to do so. Here, is my thinking acc

Answer 1

ad 1) Correct names are verified automatically by Python if they are called like somefunct(name=value, ...). I need not to remember the exact standard order of parameters and to verify it too "neurotic" by looking into the documentation every month at every usage, if I remember a function with nice descriptive names of parameters and it will be tested that they are accepted by Python. On the contrary, the correct order of used parameters can be verified only by documentation. Calling by named parameters is preferred over very long list of positional parameters. Therefore the reported behaviour is well-founded. (Short single letter parameters "a, b" don't help against mistakes of course.)

ad 2) Some well known builtin fast functions written in C with small fixed number of required parameters do not support calling with named parameters. (e.g. hasattr)

This is because they use only simple header ...(... PyObject *args) and therefore all named parameters are rejected automatically. (Python can never introspect into names of arguments in C source. :-)

Many other C functions have a header ...(... PyObject *args, PyObject *kwds) and they support exact list of names explicitely by implementing much more complicated validation PyArg_ParseTupleAndKeywords and by writing the names to docs strings.

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Edit: Positional-only parameters are possible in Python 3.8 by a new function parameter syntax / to indicate that some function parameters must be specified positionally and cannot be used as keyword arguments.

def somefunc(a, b, /):
    print(a, b)