Use of double asterisk (**) in python

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Introduction :

Double asterisk (**) is used for packing/unpacking a dictionary.

Flexibility provided by ** is that we can unpack or pack dictionary of any number of key-value pair.

Unpacking dictionary :

Packing dictionary :

To sum up:

In unpacking a dictionary, we need a predefined dictionary which is used as an input in a function and we get all the items unpacked.

In packing a dictionary, we create a dictionary using arguments as keys and values of arguments as values for a newly created dictionary.