What are *args and **kwargs in Python?

*args lets a function accept any number of positional arguments, which arrive as a tuple. **kwargs lets it accept any number of keyword arguments (name=value), which arrive as a dictionary.

def show(*args, **kwargs):
    print(args)
    print(kwargs)

show(1, 2, name="Robin", age=20)

Output:

The names args and kwargs are only a habit. The stars are what matter. They are useful when you do not know in advance how many values will be passed, for example in a function that adds any amount of numbers.

def total(*numbers):
    return sum(numbers)

print(total(1, 2, 3, 4))

Output:

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