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How to fix qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "" error

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  • G Offline
    G Offline
    Gokalp
    wrote on last edited by
    #1

    Whenever i try to run a file that uses pyqt5, i get this message and the code wont work:
    qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "" This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
    I uninstalled python, installed older versions etc. nothing worked. When i tried to run the same code on a friend's pc though, it ran without a problem. Could anyone help me fix this problem? (By the way i don't use virtual environments so any solutions that include it probably won't work for me)(I'm currently using vs code,my pc has win10 , i'm using python 3.10.2)

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    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi and welcome to devnet,

      You should try starting your script with the QT_DEBUG_PLUGINS environment variable set to 1 to get more information about what happens with the plugins.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      G 1 Reply Last reply
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      • SGaistS SGaist

        Hi and welcome to devnet,

        You should try starting your script with the QT_DEBUG_PLUGINS environment variable set to 1 to get more information about what happens with the plugins.

        G Offline
        G Offline
        Gokalp
        wrote on last edited by
        #3

        @SGaist I have never used virtual environments so i didn't really get what you meant, could you explain it a little bit more?

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        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #4

          I did not write about "virtual environments" but about "environment variable".

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          G 1 Reply Last reply
          1
          • SGaistS SGaist

            I did not write about "virtual environments" but about "environment variable".

            G Offline
            G Offline
            Gokalp
            wrote on last edited by
            #5

            @SGaist I did what you said and got this message
            QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/GOKTUº ALKAN/AppData/Local/Programs/Python/Python310/platforms" ...
            qt.qpa.plugin: Could not find the Qt platform plugin "windows" in ""
            This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #6

              Hi,

              You should have had way more messages than that. There should be a full plugin dump.

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

              G 1 Reply Last reply
              1
              • SGaistS SGaist

                Hi,

                You should have had way more messages than that. There should be a full plugin dump.

                G Offline
                G Offline
                Gokalp
                wrote on last edited by
                #7

                @SGaist Thats all i got. Maybe i'm doing something wrong? i used this: os.environ["QT_DEBUG_PLUGINS"] = "1"

                jsulmJ 1 Reply Last reply
                0
                • G Gokalp

                  @SGaist Thats all i got. Maybe i'm doing something wrong? i used this: os.environ["QT_DEBUG_PLUGINS"] = "1"

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  @Gokalp said in How to fix qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "" error:

                  i used this: os.environ["QT_DEBUG_PLUGINS"] = "1"

                  This is not going to work this way.
                  Set it in a terminal and then start your app in this terminal.

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  G 1 Reply Last reply
                  0
                  • jsulmJ jsulm

                    @Gokalp said in How to fix qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "" error:

                    i used this: os.environ["QT_DEBUG_PLUGINS"] = "1"

                    This is not going to work this way.
                    Set it in a terminal and then start your app in this terminal.

                    G Offline
                    G Offline
                    Gokalp
                    wrote on last edited by
                    #9

                    @jsulm said in How to fix qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "" error:

                    os.environ["QT_DEBUG_PLUGINS"] = "1"

                    How can i set it in the terminal?

                    jsulmJ 1 Reply Last reply
                    0
                    • G Gokalp

                      @jsulm said in How to fix qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "" error:

                      os.environ["QT_DEBUG_PLUGINS"] = "1"

                      How can i set it in the terminal?

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by
                      #10

                      @Gokalp On Windows:

                      set QT_DEBUG_PLUGINS=1
                      

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      G 1 Reply Last reply
                      0
                      • jsulmJ jsulm

                        @Gokalp On Windows:

                        set QT_DEBUG_PLUGINS=1
                        
                        G Offline
                        G Offline
                        Gokalp
                        wrote on last edited by
                        #11

                        @jsulm still the sameaa.PNG

                        1 Reply Last reply
                        0
                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #12

                          Can you retry with an environment stored in a path without space or accented character ?

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                          G 1 Reply Last reply
                          1
                          • SGaistS SGaist

                            Can you retry with an environment stored in a path without space or accented character ?

                            G Offline
                            G Offline
                            Gokalp
                            wrote on last edited by
                            #13

                            @SGaist How can i do that? My brother happened to be at home when this pc arrived so he made the username his name which contains Ö and Ğ characters... I tried to change the username several times but it never changed on the terminal so i really don't know what to do. Maybe there is another way that i can do what you're saying?

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                            0
                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #14

                              Install your python environment in a folder starting from the root of your disk. For example "C:/Code/name_of_your_environment".

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                              G 1 Reply Last reply
                              0
                              • SGaistS SGaist

                                Install your python environment in a folder starting from the root of your disk. For example "C:/Code/name_of_your_environment".

                                G Offline
                                G Offline
                                Gokalp
                                wrote on last edited by
                                #15

                                @SGaist Could you tell me how to do that? I have never used python that way since i didn't face any problems before

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                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #16

                                  How did you install Python ?
                                  How are you managing your virtual environments ?

                                  Interested in AI ? www.idiap.ch
                                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                  G 1 Reply Last reply
                                  0
                                  • SGaistS SGaist

                                    How did you install Python ?
                                    How are you managing your virtual environments ?

                                    G Offline
                                    G Offline
                                    Gokalp
                                    wrote on last edited by
                                    #17

                                    @SGaist I have never messed with environments, i installed python from its site and used it globally. All of my modues are also installed globally.

                                    jsulmJ 1 Reply Last reply
                                    0
                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #18

                                      Then I would recommend reconsidering that modus operandi.

                                      Interested in AI ? www.idiap.ch
                                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                      0
                                      • G Gokalp

                                        @SGaist I have never messed with environments, i installed python from its site and used it globally. All of my modues are also installed globally.

                                        jsulmJ Offline
                                        jsulmJ Offline
                                        jsulm
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #19

                                        @Gokalp said in How to fix qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "" error:

                                        i installed python from its site

                                        Which site?
                                        Using Python installer from official Python website allows you to select the installation folder.

                                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                                        G 1 Reply Last reply
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                                        • jsulmJ jsulm

                                          @Gokalp said in How to fix qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "" error:

                                          i installed python from its site

                                          Which site?
                                          Using Python installer from official Python website allows you to select the installation folder.

                                          G Offline
                                          G Offline
                                          Gokalp
                                          wrote on last edited by
                                          #20

                                          @jsulm i installed it directly into the c folder

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