Args and Kwargs

Lets learn about *args and **kwargs keywords that show up alot as parameters in functions.

def add_func(a,b):
    print(a+b)    

add_func(2,3)

    5

Our function can take only two input parameters a and b.

*args

To make a function so that it accepts, practically unlimited, number of input paramters, we use the *args keyword. It will build the tuple out of your input parameters.

def add_func(*args):
    print(sum(args))

add_func(2,3,4,5,6,7,8)

    35

**kwargs

It will build a dictionary of key:value pairs based on your input.

def func(**kwargs):
    print(kwargs)

func(name='muzammil',fruit='apple',balls=3)

    {'name': 'muzammil', 'fruit': 'apple', 'balls': 3}

Let’s combine both *args and **kwargs.

def func(*args,**kwargs):
    if 'fruit' in kwargs.keys():
        print(f"I have {sum(args)} number of {kwargs['fruit']}")
    else:
        pass

func(2,3,fruit='apple')

    I have 5 number of apple