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Maxim Andreev
24,529 PointsRegex challenge
Can't figure out what I am missing...
import re
string = '''Love, Kenneth, kenneth+challenge@teamtreehouse.com, 555-555-5555, @kennethlove
Chalkley, Andrew, andrew@teamtreehouse.co.uk, 555-555-5556, @chalkers
McFarland, Dave, dave.mcfarland@teamtreehouse.com, 555-555-5557, @davemcfarland
Kesten, Joy, joy@teamtreehouse.com, 555-555-5558, @joykesten'''
contacts = re.search(r'''
^(?P<email>[\w.-+]+@[\w.-]+)? # email
(?P<phone>\d{3}-\d{3}-\d{4})?$ # phone
''', string, re.X|re.M)
2 Answers
Kenneth Love
Treehouse Guest TeacherYou probably got an error about a bad range. The re engine is weird about hyphens. Move the hyphens you're using to the beginning of their sets. That'll clear up that error.
Next, though, you're gonna get an error about not getting a search object. You're using ^ and $ in your pattern when your pattern doesn't actually match the beginning or end of the string. Don't use those for this challenge.
Maxim Andreev
24,529 PointsThe re.M flag takes care of it Kenneth Love, and makes it so that each new line is treated as a new string. While the parenthesis adds the individual items within that tuple.
Maxim Andreev
24,529 PointsMaxim Andreev
24,529 PointsYes I realize it now..since hyphens are for ranges too like [a-z] it messes with the code. Thanks!
But I don't think that I fully understand ^$ and re.MULTILINE then.
How would you specify that each tuple should only be for each individual line?
edit: I understand ^$ re.M now... re.M re.MULTILINE When specified, the pattern character '^' matches at the beginning of the string and at the beginning of each line (immediately following each newline); and the pattern character '$' matches at the end of the string and at the end of each line (immediately preceding each newline). By default, '^' matches only at the beginning of the string, and '$' only at the end of the string and immediately before the newline (if any) at the end of the string.
however I am still unclear of how to make sure the tuple only is created on a line by line basis.
edit 2: Nevermind figured it out, thanks
Kenneth Love
Treehouse Guest TeacherKenneth Love
Treehouse Guest TeacherMind sharing your understanding for those that follow this thread later?