User FAQs

1) How can I declare an Optional Parameter ?

2) Can we pass a function as an argument ?
Yes, Several arguments can be passed to a function, including objects, variables (of the same or distinct data types) and functions.
Functions can be passed as parameters to other functions because they are objects.
Higher-order functions are functions that can take other functions as arguments.

def add(x, y): 
    return x + y 

def apply_func(func, a, b): 
    return func(a, b) 

print(apply_func(add, 3, 5)) 

3) What does *args mean ?
A special syntax used in a function definition to pass variable length arguments.

4) What does *kwargs mean ?
A special syntax used in a function definition to pass variable length keyworded arguments

5) What are Arbitrary Arguments ?
Arbitrary Arguments are often shortened to *args in Python documentations.
If you do not know how many arguments that will be passed into your function, add a * before the parameter name in the function definition.
This way the function will receive a tuple of arguments, and can access the items accordingly.