How can I define a function with default parameter values and optional parameters in Python?

Question

I want to define a function to which the input parameters can be omitted or have a default value.

I have this function:

def nearxy(x,y,x0,y0,z):
   d         


        

Answer 1

def nearxy(x, y, x0 = 0, y0 = 0, z = None):
   ...

Check if z is None to see if it has been omitted.