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Python Regular Expressions in Python Introduction to Regular Expressions Players Dictionary and Class

Tobias Edwards
Tobias Edwards
14,458 Points
Posted by Tobias Edwards
Tobias Edwards
14,458 Points

Introduction to Regular Expressions Final Challenge (classes)

Question: Wow! OK, now, create a class named Player that has those same three attributes, last_name, first_name, and score. I should be able to set them through init.

Does this mean just grab the data from players and replicate this under init? I have attached my code so far

Any help on what to do and how to do it would be greatly appreciated.

Also, Merry Christmas!

players.py 
import re

string = '''Love, Kenneth: 20
Chalkley, Andrew: 25
McFarland, Dave: 10
Kesten, Joy: 22
Stewart Pinchback, Pinckney Benton: 18'''

players = re.match('''
  ^(?P<last_name>[\w\s]+),\s
  (?P<first_name>[\w\s]+):\s
  (?P<score>\d\d)$
''', string, re.M|re.X)

class Player:
  def __init__(self):
    # last_name = fetch the data from players.last_name
    # first_name = fetch the data from players.first_name
    # score = fetch the data from players.score

5 Answers

Scott Dunstan
Scott Dunstan
12,517 Points
Scott Dunstan
Scott Dunstan
12,517 Points

Hey Tobias, nope, it's simpler. You just need to set the variables - seems unrelated:

class Player:
  def __init__(self, last_name, first_name, score):
    self.last_name = last_name
    self.first_name = first_name
    self.score = score
Tobias Edwards
Tobias Edwards
14,458 Points
Tobias Edwards
Tobias Edwards
14,458 Points

Thanks, mate - I clearly over complicated things

David Vote
David Vote
3,092 Points

Yes, thanks for this, I was making it way more complicated than it needed to be. Cheers!

Scott Dunstan
Scott Dunstan
12,517 Points
Scott Dunstan
Scott Dunstan
12,517 Points

Guilty of the same thing mate, results in a face-palm most times.

Oziel Perez
Oziel Perez
61,321 Points
Oziel Perez
Oziel Perez
61,321 Points

Actually this did not work for me at all! (well to be honest I didn't name my parameters "first_name", "last_name", "score", I named them "one", "two", "three"). It kept telling me that an unexpected keyword argument "<group_name>" was being passed in. I was stuck for hours on this until I finally noticed that when I rechecked my work without any changes, I noticed that the <group_name> changed sometimes. Sometimes it would be "first_name", sometimes "last_name", and so on. That led me to believe that it was several tuples or dictionaries being passed in, each argument having key and value pairs (ex: ("first_name", "Kenneth"), ("last_name", "Love")). Idk I was willing to try anything by that point, so this is what I typed out:

class Player:
     def __init__(self, **kwargs):
          for key, value in kwargs.items():
                if key == "first_name":
                       self.first_name = value
                elif key == "last_name":
                       self.last_name = value
                elif key == "score":
                       self.score = value

it totally worked for me, and it makes sense since the match() object will only yield a tuple with all the values or a dicitonary if .groupdict() was used on the object. Hope this helps anyone else in case they get stuck as well and the above answers don't work

Denis Chernenko
Denis Chernenko
4,077 Points

thank you for good idea, which is more flexible in terms of working with data the only remark is == instead of = in "if" clause in your code

Oziel Perez
Oziel Perez
61,321 Points
Oziel Perez
Oziel Perez
61,321 Points

Denis Chernenko, updated answer to your comment

John Peck
John Peck
21,270 Points
John Peck
John Peck
21,270 Points

These challenges are terribly paced. Instructors, look up "pedagogy and scaffolding" please. This is a nightmare.

Seph Cordovano
Seph Cordovano
17,400 Points
Seph Cordovano
Seph Cordovano
17,400 Points

I've been trying to answer this question for 3hrs. This is ridiculously worded and unclear. 

import re

string = '''Love, Kenneth: 20
Chalkley, Andrew: 25
McFarland, Dave: 10
Kesten, Joy: 22
Stewart Pinchback, Pinckney Benton: 18'''

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


class Player:
    def __init__(self, last_name, first_name, score):
        self.last_name = last_name
        self.first_name = first_name
        self.score = score


for player in players.finditer(string):
    p = player.groupdict()
    Player(p['last_name'], p['first_name'], p['score'])