Append data to a list within a dict

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  • Tina I
    #1

    Append data to a list within a dict

    Hello group,

    Say I have the following dictionary:

    ListDict = {
    'one' : ['oneone' , 'onetwo' , 'onethree'],
    'two' : ['twoone' , 'twotwo', 'twothree'],
    'three' : ['threeone' , 'threetwo', threethree']}

    Now I want to append 'twofour' to the list of the 'two' key but I can't
    figure out how to that?
    Some pointers would be greatly appreciated.

    Thanks
    Tina
    Tags: None
    • Michael Bentley
      #2
      Re: Append data to a list within a dict


      On Apr 14, 2007, at 12:39 AM, Tina I wrote:
      Say I have the following dictionary:
      >
      ListDict = {
      'one' : ['oneone' , 'onetwo' , 'onethree'],
      'two' : ['twoone' , 'twotwo', 'twothree'],
      'three' : ['threeone' , 'threetwo', threethree']}
      >
      Now I want to append 'twofour' to the list of the 'two' key but I
      can't
      figure out how to that?
      Some pointers would be greatly appreciated.
      ListDict['two'].append('twofou r')

      But you'll have to insert the missing single quote before
      "threethree " first.

      hope this helps,
      Michael

        Comment

        • Paul Rubin
          #3
          Re: Append data to a list within a dict

          Tina I <tinaweb@bestem selv.comwrites:
          ListDict = {
          'one' : ['oneone' , 'onetwo' , 'onethree'],
          'two' : ['twoone' , 'twotwo', 'twothree'],
          'three' : ['threeone' , 'threetwo', threethree']}
          >
          Now I want to append 'twofour' to the list of the 'two' key but I
          can't figure out how to that?
          Is this a class exercise? Hint:
          1) figure out how to access the list of the 'two' key
          2) append 'twofour' to it.

            Comment

            • 7stud
              #4
              Re: Append data to a list within a dict

              On Apr 13, 11:39 pm, Tina I <tina...@bestem selv.comwrote:
              Hello group,
              >
              Say I have the following dictionary:
              >
              ListDict = {
              'one' : ['oneone' , 'onetwo' , 'onethree'],
              'two' : ['twoone' , 'twotwo', 'twothree'],
              'three' : ['threeone' , 'threetwo', threethree']}
              >
              Now I want to append 'twofour' to the list of the 'two' key but I can't
              figure out how to that?
              Some pointers would be greatly appreciated.
              >
              Thanks
              Tina

              ListDict["two"] returns the list. So you can do this:

              lst = listDict["two"]
              lst.append("two four")

              or you can do it directly like this:

              ListDict["two"].append("twofou r")


                Comment

                • Michael Bentley
                  #5
                  Re: Append data to a list within a dict


                  On Apr 14, 2007, at 12:51 AM, Paul Rubin wrote:
                  Is this a class exercise? Hint:
                  1) figure out how to access the list of the 'two' key
                  2) append 'twofour' to it.
                  damn.

                    Comment

                    • Tina I
                      #6
                      Re: Append data to a list within a dict

                      Paul Rubin wrote:
                      Tina I <tinaweb@bestem selv.comwrites:
                      >ListDict = {
                      >'one' : ['oneone' , 'onetwo' , 'onethree'],
                      >'two' : ['twoone' , 'twotwo', 'twothree'],
                      >'three' : ['threeone' , 'threetwo', threethree']}
                      >>
                      >Now I want to append 'twofour' to the list of the 'two' key but I
                      >can't figure out how to that?
                      >
                      Is this a class exercise? Hint:
                      1) figure out how to access the list of the 'two' key
                      2) append 'twofour' to it.
                      He he... at the age of 40 I'm well beyond school work ;)
                      But thanks anyway

                      Tina

                        Comment

                        • Tina I
                          #7
                          Re: Append data to a list within a dict

                          Michael Bentley wrote:
                          >
                          On Apr 14, 2007, at 12:39 AM, Tina I wrote:
                          >
                          >Say I have the following dictionary:
                          >>
                          >ListDict = {
                          >'one' : ['oneone' , 'onetwo' , 'onethree'],
                          >'two' : ['twoone' , 'twotwo', 'twothree'],
                          >'three' : ['threeone' , 'threetwo', threethree']}
                          >>
                          >Now I want to append 'twofour' to the list of the 'two' key but I can't
                          >figure out how to that?
                          >Some pointers would be greatly appreciated.
                          >
                          ListDict['two'].append('twofou r')
                          >
                          But you'll have to insert the missing single quote before "threethree "
                          first.
                          >
                          hope this helps,
                          Michael
                          Great! Thanks!
                          And the missing singlequote was just a typo, my actual dictionary is way
                          bigger so I just made up this as an example.

                          Tina

                            Comment

                            • Hendrik van Rooyen
                              #8
                              Re: Append data to a list within a dict

                              "Tina I" <ti,,eb@be...el v.comwrote:

                              Hello group,
                              >
                              Say I have the following dictionary:
                              >
                              ListDict = {
                              'one' : ['oneone' , 'onetwo' , 'onethree'],
                              'two' : ['twoone' , 'twotwo', 'twothree'],
                              'three' : ['threeone' , 'threetwo', threethree']}
                              >
                              Now I want to append 'twofour' to the list of the 'two' key but I can't
                              figure out how to that?
                              Some pointers would be greatly appreciated.
                              >
                              Just do it:

                              ListDict['two'].append('twofou r')

                              This works because ListDict['two'] is a list...

                              - Hendrik

                                Comment

                                • Alex Martelli
                                  #9
                                  Re: Append data to a list within a dict

                                  Tina I <tinaweb@bestem selv.comwrote:
                                  ...
                                  He he... at the age of 40 I'm well beyond school work ;)
                                  Why would that be? My wife's over 40, yet she's a student (currently at
                                  Stanford -- they were overjoyed to admit her, with lot of life
                                  experience as well as previous studies, apparently). She's not taking
                                  elementary courses on Python (having co-written a book on Python,
                                  tech-reviewed a few, and having been the first woman coopted as a member
                                  of the PSF:-), but she _has_ been taken equivalent ones on Java and C++
                                  (languages she didn't previously know), as well as calculus,
                                  neurophysiology , and other strange things that are part of the "Symbolic
                                  Systems" studies.

                                  Down with ageism!-)


                                  Alex

                                    Comment

                                    • Tina I
                                      #10
                                      Re: Append data to a list within a dict

                                      Alex Martelli wrote:
                                      Tina I <tinaweb@bestem selv.comwrote:
                                      ...
                                      >He he... at the age of 40 I'm well beyond school work ;)
                                      >
                                      Why would that be? My wife's over 40, yet she's a student (currently at
                                      Stanford -- they were overjoyed to admit her, with lot of life
                                      experience as well as previous studies, apparently). She's not taking
                                      elementary courses on Python (having co-written a book on Python,
                                      tech-reviewed a few, and having been the first woman coopted as a member
                                      of the PSF:-), but she _has_ been taken equivalent ones on Java and C++
                                      (languages she didn't previously know), as well as calculus,
                                      neurophysiology , and other strange things that are part of the "Symbolic
                                      Systems" studies.
                                      >
                                      Down with ageism!-)
                                      >
                                      >
                                      Alex
                                      >
                                      It's not really ageism, just how I feel *my self* about going back to
                                      school. I'm not done learning though, it's just that I can give my self
                                      the luxury of learning whatever I want, just what I want at the pace
                                      that I want. And since I happen to like computers that's mostly what I
                                      concentrate about. Right now I'm hooked on Python, but also messing
                                      about with PHP and Javascript. Tried some Java but didn't like it...
                                      Threw out Windows a couple of years ago and have spent quite some time
                                      learning the ins and outs of Linux.

                                      So even if I probably will never go back to school I'm looking forward
                                      to many many years learning new and exciting things :)

                                      Tina
                                      (Sorry for the way OT post. I just couldn't stop my own ramble ;)

                                        Comment

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