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Python

Posted by Joshua Yoerger
Joshua Yoerger
11,206 Points

My solution to the Player class regex challenge using **kwargs:

This is more a solution than a question, but I saw others here trying to get the class to work with **kwargs so I thought I'd share my solution for others.

players = re.search(r'''
    ^(?P<last_name>[\w\s]+),\s    # Last name
    (?P<first_name>[\w\s]+):\s    # First name
    (?P<score>\d+)$    # Score
''', string, re.M|re.V)


class Player():

    def __init__(self, **kwargs):
        for key, value in kwargs.items():
            setattr(self, key, value)

I like the idea of using **kwargs rather than naming the attributes explicitly. This makes the code more general purpose and flexible - if I add another group to my regex query, I don't have to update my class to accept the new attribute. Hope this is helpful to someone. Cheers!

1 Answer

Iain Simmons
Iain Simmons
Treehouse Moderator 32,305 Points

It's important to note the syntax required to use this, as **kwargs expects multiple keyword arguments to be passed, but players will be a single Match object. If you want to get the keyword arguments, you can unpack a dictionary of the named groups by using groupdict() on the Match object:

new_player = Player(**players.groupdict())
Joshua Yoerger
Joshua Yoerger
11,206 Points

Good call. I didn't play around with this after it passed the code challenge, so I didn't even think about how creating new class instances would work. Thanks!