Explain *args and **kwargs in python

Question 1

general summary

Answer 1

In Python, *args and **kwargs are often used to pass a variable number of arguments to a function.

*args collects a variable number of positional arguments into a tuple

**kwargs does the same for keyword arguments into a dictionary.

Question 2

*args

Answer 2

Variable Number of Positional Arguments

How it Works: The name *args is a convention. The asterisk (*) tells Python to put any remaining positional arguments it receives into a tuple.

Use-Case: When the number of arguments needed is uncertain.

def sum_all(*args):
    result = 0
    for num in args:
        result += num
    return result

print(sum_all(1, 2, 3, 4))  # Output: 10

Question 3

**kwargs

Answer 3

Variable Number of Keyword Arguments

How it Works: The double asterisk (**) is used to capture keyword arguments and their values into a dictionary.

Use-Case: When a function should accept an arbitrary number of keyword arguments.

def print_values(**kwargs):
    for key, value in kwargs.items():
        print(f"{key}: {value}")

Keyword arguments are captured as a dictionary
print_values(name="John", age=30, city="New York")
# Output:
# name: John
# age: 30
# city: New York