How Can I Pass a Dictionary as Keyword Arguments to a Python Function?

Unpacking a Dictionary as Keyword Parameters in Python

When invoking functions in Python, you may encounter scenarios where you wish to pass a dictionary containing parameters that match the function's argument names.

Consider the following code snippet:

d = dict(param='test')

def f(param):
    print(param)

f(d)

This code prints the dictionary, rather than its value. To resolve this, you can utilize the ** operator to unpack the dictionary, resulting in a call that provides the parameter by name:

f(**d)

This refined code snippet prints "test" as intended.

The same principle applies when passing multiple parameters:

d = dict(p1=1, p2=2)
def f2(p1, p2):
    print(p1, p2)
f2(**d)

Using the ** operator ensures that the dictionary's key-value pairs are treated as individual arguments to the function. By unpacking the dictionary in this manner, you can seamlessly pass parameters by name and obtain the desired results.

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