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Write at the beginn of a File (.py)

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  • J.HilkJ J.Hilk

    @JonB Simple,
    I took the liberty to copy and past @VRonin example from before and edit it ;-)

    JonBJ Online
    JonBJ Online
    JonB
    wrote on last edited by
    #13

    @J.Hilk
    Lol! :) OK, I commented on that earlier, far be it for us to disagree with the venerable @VRonin :) Anyway, the OP can do it either way as he sees fit.

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    • N Offline
      N Offline
      NotYourFan
      wrote on last edited by
      #14

      @J-Hilk

      Wehen i run your code, my .py scriptcode changed complete to only ONE Row.

      J.HilkJ 1 Reply Last reply
      0
      • N NotYourFan

        @J-Hilk

        Wehen i run your code, my .py scriptcode changed complete to only ONE Row.

        J.HilkJ Offline
        J.HilkJ Offline
        J.Hilk
        Moderators
        wrote on last edited by
        #15

        @NotYourFan
        the example is not checked, I don't have a +py file for that.

        Obviously you need to add a new line character at the end of each line.

        if( i == 5)
                     wstream <<  "test = 'TestFile.csv' "  << "\n";
                wstream << v.at(i) << "\n";;
        

        Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


        Q: What's that?
        A: It's blue light.
        Q: What does it do?
        A: It turns blue.

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        2
        • N Offline
          N Offline
          NotYourFan
          wrote on last edited by
          #16
          This post is deleted!
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          • N Offline
            N Offline
            NotYourFan
            wrote on last edited by
            #17

            @J-Hilk
            now it works the problem is when i changed the wstram it doesent override.

            i get " test = 'Hallo221.csv' test = 'Hallo1.csv' ...."

            how i can override?

            thx

            JonBJ 1 Reply Last reply
            0
            • N NotYourFan

              @J-Hilk
              now it works the problem is when i changed the wstram it doesent override.

              i get " test = 'Hallo221.csv' test = 'Hallo1.csv' ...."

              how i can override?

              thx

              JonBJ Online
              JonBJ Online
              JonB
              wrote on last edited by
              #18

              @NotYourFan
              What does "override" mean? Do you mean "overwrite" what is already in wstream? Do you mean wstream.seek(0)?

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              • N Offline
                N Offline
                NotYourFan
                wrote on last edited by
                #19

                yeah sry,

                i mean "overwrite".

                i always get " test = 'Hallo221.csv' test = 'Hallo1.csv' test = 'Hallo12321.csv' .....

                but i want to get only "test = 'Hallo12321.csv' so i want to "overwrite" the line 5 and not add a new string

                JonBJ J.HilkJ 2 Replies Last reply
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                • N NotYourFan

                  yeah sry,

                  i mean "overwrite".

                  i always get " test = 'Hallo221.csv' test = 'Hallo1.csv' test = 'Hallo12321.csv' .....

                  but i want to get only "test = 'Hallo12321.csv' so i want to "overwrite" the line 5 and not add a new string

                  JonBJ Online
                  JonBJ Online
                  JonB
                  wrote on last edited by JonB
                  #20

                  @NotYourFan
                  So did you try my wstream.seek(0)? after the first write and before the second?
                  Or, depending on just what you intend by "overwrite", you may need to wstream.resize(0).
                  Try with both "first-string-is-long", "second-is-short" and then with "first-is-short", "second-string-is-long" to see the difference between seek(0) vs resize(0).

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                  • N NotYourFan

                    yeah sry,

                    i mean "overwrite".

                    i always get " test = 'Hallo221.csv' test = 'Hallo1.csv' test = 'Hallo12321.csv' .....

                    but i want to get only "test = 'Hallo12321.csv' so i want to "overwrite" the line 5 and not add a new string

                    J.HilkJ Offline
                    J.HilkJ Offline
                    J.Hilk
                    Moderators
                    wrote on last edited by J.Hilk
                    #21

                    @NotYourFan

                    You're doing fishy stuff, that may break at any point. 
                    You should rethink what you're actually trying to do.

                    for(int i(0); i < v.size(); i++){
                             if( i == 5) {
                                 wstream <<  "test = 'TestFile.csv' "   << "\n";
                                if(v.at(i).contains("test = '"))
                                    continue;
                             }        
                             wstream << v.at(i)  << "\n";
                        }
                    

                    Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                    Q: What's that?
                    A: It's blue light.
                    Q: What does it do?
                    A: It turns blue.

                    N 1 Reply Last reply
                    3
                    • J.HilkJ J.Hilk

                      @NotYourFan

                      You're doing fishy stuff, that may break at any point. 
                      You should rethink what you're actually trying to do.

                      for(int i(0); i < v.size(); i++){
                               if( i == 5) {
                                   wstream <<  "test = 'TestFile.csv' "   << "\n";
                                  if(v.at(i).contains("test = '"))
                                      continue;
                               }        
                               wstream << v.at(i)  << "\n";
                          }
                      
                      N Offline
                      N Offline
                      NotYourFan
                      wrote on last edited by
                      #22

                      @J.Hilk
                      PERFEKT !!!!!
                      THANK YOU SO MUTCH

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