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Wes Chumley
6,385 PointsWow! OK, now, create a class named Player that has those same three attributes,
I'm at a complete loss here. Please help and explain. This entire regular expressions lesson has me so confused
import re
string = '''Love, Kenneth: 20
Chalkley, Andrew: 25
McFarland, Dave: 10
Kesten, Joy: 22
Stewart Pinchback, Pinckney Benton: 18'''
players = re.search(r'''
(?P<last_name>[-\w\s?]*),\s # Last Names
(?P<first_name>[-\w\s?]+):\s # First Names
(?P<score>[\d]+) # Score
''', string, re.X|re.M) # VERBOSE and MULTILINE
class Player:
last_name = str()
first_name = str()
score = str()
def __init__(self, **players.groupdict()):
self.last_name = input('last name: ')
self.first_name = input('first_name: ')
self.score = input('score: ')
4 Answers
Chris Freeman
Treehouse Moderator 68,457 PointsIt looks like your only missing the proper parameters in the __init__() method.
class Player:
last_name = ""
first_name = ""
score = ""
def __init__(self, last_name=last_name, first_name=first_name, score=score):
self.last_name = last_name
self.first_name = first_name
self.score = score
# Here is a simplified version that does not set class attributes nor use the class attributes as
# '__init__' defaults. This also passes the challenge:
class Player:
def __init__(self, last_name, first_name, score):
self.last_name = last_name
self.first_name = first_name
self.score = score
Wes Chumley
6,385 PointsChris,
this does pass the challenge but somehow it just doesn't seem to be exactly what the challenge is asking me to do. Seems more like a workaround to get the output the challenge needs to pass, rather than actually solving the question. Am I wrong?
Chris Freeman
Treehouse Moderator 68,457 PointsHey Wes, I've revisited the challenge. I've added a simplified version of Player that also pases the challenge.
Emmanuel Obi
14,912 PointsThis approach works (in a Python shell), but does not pass on the site for some reason:
class Player():
def __init__(self, string):
attrs = re.search(r'''
^(?P<last_name>[\w\s]+),\s
(?P<first_name>[\w\s]+):\s
(?P<score>[\d]+)$
''', string, re.X|re.M).groupdict()
self.last_name = attrs.get('last_name', '')
self.first_name = attrs.get('first_name', '')
self.score = attrs.get('score', '')
Chris Freeman
Treehouse Moderator 68,457 PointsThe challenge wants to see the re.search expression assigned to the variable players outside of the class definition.
Emmanuel Obi
14,912 Pointsyeah, Chris Freeman, I figured as much... Come to think of it, my approach is brittle in that control of which attrs get set is based on the string. Not good. I concede that the keywords args are more extensible. I could loop over an array of match groupdicts and pass **kwargs to Player.__init__() for great good!
Matija Pildek
8,809 PointsAnother solution.
class Player(): def init(self, **players): for key, value in players.items(): setattr(self,key,value)
Serbay ACAR
147 PointsThis is a full solution for related challenge. In the init definition , this challenge expect from us that we must create a Plater object for each line in string.
import re
string = '''Love, Kenneth: 20
Chalkley, Andrew: 25
McFarland, Dave: 10
Kesten, Joy: 22
Stewart Pinchback, Pinckney Benton: 18'''
players = re.search(r''' ^(?P<last_name>[-\w\s*\w*]+), \s(?P<first_name>[-\w\s*\w]+): \s(?P<score>[\d]+)$ ''',string, re.X | re.M)
class Player :
last_name = str()
first_name = str()
score = str()
def __init__(self):
for match in players.groupdict():
self.last_name = str(match.last_name)
self.first_name = str(match.first_name)
self.score = str(match.score)
Stephen Lorenz
3,271 Pointscan we use "" here instead of str(), or is there a reason str() is preferable?
Chris Freeman
Treehouse Moderator 68,457 PointsYes.
>>> str() == ""
True
Wes Chumley
6,385 PointsWes Chumley
6,385 PointsChallenge text :
Wow! OK, now, create a class named Player that has those same three attributes, lastname, first_name, and score. I should be able to set them through _init.