Requiring your arguments be named in a function calling

python3_requiere_named_arguments.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

def classic_function(x, y ,z):
    print(x, y, z)
    
def force_named_arguments_function(*, x, y ,z):
    print(x, y, z)


if __name__ == "__main__":
    print("Classic function calling")
    print("================================================\n")
    classic_function(1, 2, 3)
    classic_function(1, 2, z=3)
    classic_function(x=1, y=2, z=3)
    try:
        eval('classic_function(x=1, 2, 3)')
    except SyntaxError as e:
        print(e)
        print("Expected error: classic_function(x=1, 2, 3)")
    
    # --------------------
    
    print("\nFunction calling with required named arguments")
    print("================================================\n")
    try:
        eval('force_named_arguments_function(x=1, 2, 3)')
    except SyntaxError as e:
        print(e)
        print("Expected error: force_named_arguments_function(x=1, 2, 3)")
    try:
        eval('force_named_arguments_function(1, 2, z=3)')
    except TypeError as e:
        print(e)
        print("Expected error: force_named_arguments_function(1, 2, z=3)")
    
    force_named_arguments_function(x=1, y=2, z=3)
    
    try:
        eval('force_named_arguments_function(x=1, 2, 3)')
    except SyntaxError as e:
        print(e)
        print("Expected error: force_named_arguments_function(x=1, 2, 3)")