args and kwargs in python

In Python, args and kwargs are special parameters that can be used in function definitions to pass a varying number of arguments to a function.

args is used to pass a variable number of positional arguments to a function. It is a tuple containing all the positional arguments passed to the function. Here's an example:

def my_function(*args):
    for arg in args:
        print(arg)

my_function('hello', 'world', 123)  # prints 'hello', 'world', and 123

In this example, the *args parameter allows the function to accept any number of positional arguments. The for loop then iterates over each argument and prints it.

kwargs is used to pass a variable number of keyword arguments to a function. It is a dictionary containing all the keyword arguments passed to the function. Here's an example:

def my_function(**kwargs):
    for key, value in kwargs.items():
        print(key, value)

my_function(name='John', age=30, city='New York')  # prints 'name John', 'age 30', and 'city New York'

In this example, the **kwargs parameter allows the function to accept any number of keyword arguments. The for loop then iterates over each key-value pair in the dictionary and prints it.