How to Pass Dictionaries as Keyword Parameters in Python?

Passing Dictionaries as Keyword Parameters

When constructing flexible functions that accept multiple parameters, utilizing dictionaries can provide a convenient method to specify input values. However, inadvertently omitting the ** operator can lead to unexpected results.

Originally, an attempt was made to invoke a function using a dictionary with matching key-value pairs:

d = dict(param='test')

def f(param):
    print(param)

f(d)

This code prints {'param': 'test'} instead of the intended 'test'. To resolve this, the ** operator must be introduced to unpack the dictionary and assign the values to the individual parameters:

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

f2(**d)

This revised code correctly prints 1 and 2, demonstrating the power of passing dictionaries as keyword parameters when utilizing the ** operator. This technique allows for easy function customization and enhances code flexibility.

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