how to make argument optional in python code example

Example 1: python optional parameters

def my_func(a = 1, b = 2, c = 3):
	print(a + b + c)
    
my_func()
#OUTPUT = 6

my_func(2)
#This changes the value of a to 2
#OUTPUT = 7

my_func(c = 2)
#This changes the value of c to 2
#OUTPUT = 5

Example 2: optional arguments python

def some_function (self, a, b, c, d = None, e = None, f = None, g = None, h = None):
    #code