pass **kwargs argument to another function with **kwargs

Question

I do not understand the following example, lets say I have these functions:

# python likes
def save(filename, data, **kwargs):
    fo = openX(filename, \"w\"         


        

Answer 1

In the second example you provide 3 arguments: filename, mode and a dictionary (kwargs). But Python expects: 2 formal arguments plus keyword arguments.

By prefixing the dictionary by '**' you unpack the dictionary kwargs to keywords arguments.

A dictionary (type dict) is a single variable containing key-value pairs.

"Keyword arguments" are key-value method-parameters.

Any dictionary can by unpacked to keyword arguments by prefixing it with ** during function call.