Heads up! To view this whole video, sign in with your Courses account or enroll in your free 7-day trial. Sign In Enroll

Regular Expressions in Python

Well done!

You have completed Regular Expressions in Python!

Sign up for Treehouse Back to Library

Groups

9:45 with Kenneth Love

Now that we can search for just about anything, let's organize our results a bit better. Regular expressions give us indexed and named groups, both of which are super-handy.

New terms

  • ([abc]) - creates a group that contains a set for the letters 'a', 'b', and 'c'. This could be later accessed from the Match object as .group(1)
  • (?P<name>[abc]) - creates a named group that contains a set for the letters 'a', 'b', and 'c'. This could later be accessed from the Match object as .group('name').
  • .groups() - method to show all of the groups on a Match object.
  • re.MULTILINE or re.M - flag to make a pattern regard lines in your text as the beginning or end of a string.
  • ^ - specifies, in a pattern, the beginning of the string.
  • $ - specifies, in a pattern, the end of the string.

Related Discussions

Have questions about this video? Start a discussion with the community and Treehouse staff.

Sign up

    Related Discussions

    Have questions about this video? Start a discussion with the community and Treehouse staff.

    Sign up

    It's often really handy to have multiple groups defined inside of your pattern, so 0:00
    that you can later access just parts of the text that you care about. 0:01
    Like for our case, making a group for the email address, and a group for 0:04
    the phone number, and a group for 0:07
    the name would make it a lot simpler later to pull those out and use them. 0:09
    So, at this point, 0:13
    we've gotten to where we can catch pretty much anything in our text file. 0:14
    So I think what we should do now is we should kind of just use all these 0:19
    things at once. 0:21
    This might get a little confusing, so 0:24
    what we're gonna do is we're actually gonna break these up into groups. 0:25
    So let's let's start this out with our normal print and re.findall. 0:29

    You need to sign up for Treehouse in order to download course files.

    Sign up

      You need to sign up for Treehouse in order to set up Workspace

      Sign up