Question

To avoid the obvious bugs, I’d like to prevent the use of positional arguments with some functions. Is there any way to achieve that?

Answer 1

Only Python 3 can do it properly (and you used the python3 tag, so it’s fine):

def function(*, x, y, z):
    print(x,y,z)

using **kwargs will let the user input any argument unless you check later. Also, it will hide the real arguments names from introspection.

**kwargs is not the answer for this problem.

Testing the program:

>>> function(1,2,3)
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    function(1,2,3)
TypeError: function() takes exactly 0 positional arguments (3 given)
>>> function(x=1, y=2, z=3)
1 2 3