Indexing strings

Collapse
This topic is closed.
X
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Fred
    #1

    Indexing strings

    Hi everybody

    I am searching for a possibility, to find out, what the index for a
    certain lettyer in a string is.
    My example:

    for x in text:
    if x == ' ':
    list = text[: # There I need the index of the space the
    program found during the loop...

    Is there and possibility to find the index of the space???
    Thanks for any help!
    Fred
    Tags: None
    • Patrick Useldinger
      #2
      Re: Indexing strings

      Fred wrote:
      [color=blue]
      > I am searching for a possibility, to find out, what the index for a
      > certain lettyer in a string is.
      > My example:
      >
      > for x in text:
      > if x == ' ':
      > list = text[: # There I need the index of the space the
      > program found during the loop...
      >
      > Is there and possibility to find the index of the space???
      > Thanks for any help!
      > Fred[/color]

      Use the index method, e.g.: text.index(' ').
      What exactly do you want to do?

      -pu

        Comment

        • Steve Holden
          #3
          Re: Indexing strings

          Fred wrote:[color=blue]
          > Hi everybody
          >
          > I am searching for a possibility, to find out, what the index for a
          > certain lettyer in a string is.
          > My example:
          >
          > for x in text:
          > if x == ' ':
          > list = text[: # There I need the index of the space the
          > program found during the loop...
          >
          > Is there and possibility to find the index of the space???
          > Thanks for any help!
          > Fred[/color]

          Perhaps you need something at a higher level (though you could use
          text.find(" ") for the first occurrence). I suspect you might want
          split(). Fred, meet split(). split(), meet Fred.
          [color=blue][color=green][color=darkred]
          >>> s = "The quick brown python swallows the lazy mongoose"
          >>> s.split()[/color][/color][/color]
          ['The', 'quick', 'brown', 'python', 'swallows', 'the', 'lazy', 'mongoose'][color=blue][color=green][color=darkred]
          >>> s.split(None)[/color][/color][/color]
          ['The', 'quick', 'brown', 'python', 'swallows', 'the', 'lazy', 'mongoose'][color=blue][color=green][color=darkred]
          >>> s.split(None, 3)[/color][/color][/color]
          ['The', 'quick', 'brown', 'python swallows the lazy mongoose'][color=blue][color=green][color=darkred]
          >>> s.split(None, 1)[/color][/color][/color]
          ['The', 'quick brown python swallows the lazy mongoose'][color=blue][color=green][color=darkred]
          >>>[/color][/color][/color]

          regards
          Steve
          --
          Meet the Python developers and your c.l.py favorites March 23-25
          Come to PyCon DC 2005 http://www.pycon.org/
          Steve Holden http://www.holdenweb.com/

            Comment

            • Fred
              #4
              Re: Indexing strings

              > Use the index method, e.g.: text.index(' ').[color=blue]
              > What exactly do you want to do?[/color]

              That was exactely what I was searching for. I needed a program, that
              chopped up a string into its words and then saves them into a list. I
              think I got this done...
              Thanks for the help

                Comment

                • Patrick Useldinger
                  #5
                  Re: Indexing strings

                  Fred wrote:
                  [color=blue]
                  > That was exactely what I was searching for. I needed a program, that
                  > chopped up a string into its words and then saves them into a list. I
                  > think I got this done...[/color]

                  There's a function for that: text.split().
                  You should really have a look at the Python docs. Also,
                  http://diveintopython.org/ and http://www.gnosis.cx/TPiP/ are great
                  tutorials.

                  -pu

                    Comment

                    Previous template Next
                    Working...