python default arguments values code example

Example 1: default values python

class Test:
    def __init__(self, val, num = 0):
        self.val = val
        self.num = num

# you can write this:

t = Test(1)
print(t.num) # prints 0

# OR this

t = Test(1, 2)
print(t.num) # prints 2

Example 2: python default parameters depend on other paramters

def func(n=5.0, delta=None):  # other ways are not supported
     if delta is None:
         delta = n/10