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How to run external QT program from PyQT5 on MacOS

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  • SGaistS SGaist

    Ok, in that case I would use the open shell command and pass it the path to the bundle.

    Benjamin HalkoB Offline
    Benjamin HalkoB Offline
    Benjamin Halko
    wrote on last edited by Benjamin Halko
    #6

    @SGaist I tried it out, and it gave me LSOpenURLsWithRole() failed with error -10810 for the file /Users/benjamin/Desktop/Dolphin.app.

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #7

      @Benjamin-Halko said in How to run external QT program from PyQT5 on MacOS:

      LSOpenURLsWithRole() failed with error -10810

      Are you hitting the situation described here ?

      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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      • Benjamin HalkoB Offline
        Benjamin HalkoB Offline
        Benjamin Halko
        wrote on last edited by Benjamin Halko
        #8

        @SGaist Yes that is actually the problem I am running into. Dolphin does not like being a child process of my program. Does QT have a simple solution to this problem?

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #9

          Does it only happen with Dolphin ?
          By the way, why Dolphin on macOS rather than Finder ?

          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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          • Benjamin HalkoB Offline
            Benjamin HalkoB Offline
            Benjamin Halko
            wrote on last edited by
            #10

            Well Dolphin is the only .app I am trying to open with my program, so I wouldn't know if this happens with other programs.

            What do you mean by macOS rather than Finder?

            jsulmJ 1 Reply Last reply
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            • Benjamin HalkoB Benjamin Halko

              Well Dolphin is the only .app I am trying to open with my program, so I wouldn't know if this happens with other programs.

              What do you mean by macOS rather than Finder?

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #11

              @Benjamin-Halko said in How to run external QT program from PyQT5 on MacOS:

              What do you mean by macOS rather than Finder?

              The file manager on MacOS is called Finder. There is no Dolphin unless you install it.

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

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              • Benjamin HalkoB Offline
                Benjamin HalkoB Offline
                Benjamin Halko
                wrote on last edited by Benjamin Halko
                #12

                @jsulm Yeah finder is installed. By Finder rather than MacOS do you mean telling finder to open Dolphin Emulator rather than just tell MacOS to open it?

                Oh and Dolphin works just fine when running it from Finder normally, it is just when I launch it using subprocess.Popen that is the trouble.

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #13

                  From the looks of it, we are talking about very different software.

                  "Dolphin" is known to be the KDE file manager. So from the looks of it you are trying to start something very different. Can you give more details about what it is ? And what exactly you are trying to do with your application ?

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

                  Benjamin HalkoB 1 Reply Last reply
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                  • SGaistS SGaist

                    From the looks of it, we are talking about very different software.

                    "Dolphin" is known to be the KDE file manager. So from the looks of it you are trying to start something very different. Can you give more details about what it is ? And what exactly you are trying to do with your application ?

                    Benjamin HalkoB Offline
                    Benjamin HalkoB Offline
                    Benjamin Halko
                    wrote on last edited by
                    #14

                    @SGaist I am wanting to open the Dolphin Emulator from my app as well as tell it to load a game using the -e argument that it accepts. However since Dolphin is also a QT program when trying to run it using subprocess, it tries loading both sets of libraries (from my app and Dolphin)

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #15

                      What if you use the QProcess::startDetached method ?

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

                      Benjamin HalkoB 2 Replies Last reply
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                      • SGaistS SGaist

                        What if you use the QProcess::startDetached method ?

                        Benjamin HalkoB Offline
                        Benjamin HalkoB Offline
                        Benjamin Halko
                        wrote on last edited by Benjamin Halko
                        #16

                        @SGaist Ok so I tried and nothing happened! But then I tried using the executable located in /Contents/MacOS/Dolphin
                        and it gave me this:

                        objc[2357]: Class QMacAutoReleasePoolTracker is implemented in both /Users/benjamin/Desktop/Dolphin.app/Contents/Frameworks/QtCore.framework/Versions/5/QtCore (0x10b53a9f8) and /private/var/folders/50/g29zbzlx4fb85zh8kk4g6gm40000gn/T/_MEIYRjNbS/QtCore (0x10efe8198). One of the two will be used. Which one is undefined.
                        objc[2357]: Class QT_ROOT_LEVEL_POOL__THESE_OBJECTS_WILL_BE_RELEASED_WHEN_QAPP_GOES_OUT_OF_SCOPE is implemented in both /Users/benjamin/Desktop/Dolphin.app/Contents/Frameworks/QtCore.framework/Versions/5/QtCore (0x10b53aa70) and /private/var/folders/50/g29zbzlx4fb85zh8kk4g6gm40000gn/T/_MEIYRjNbS/QtCore (0x10efe8210). One of the two will be used. Which one is undefined.
                        objc[2357]: Class KeyValueObserver is implemented in both /Users/benjamin/Desktop/Dolphin.app/Contents/Frameworks/QtCore.framework/Versions/5/QtCore (0x10b53aa98) and /private/var/folders/50/g29zbzlx4fb85zh8kk4g6gm40000gn/T/_MEIYRjNbS/QtCore (0x10efe8238). One of the two will be used. Which one is undefined.
                        objc[2357]: Class RunLoopModeTracker is implemented in both /Users/benjamin/Desktop/Dolphin.app/Contents/Frameworks/QtCore.framework/Versions/5/QtCore (0x10b53aae8) and /private/var/folders/50/g29zbzlx4fb85zh8kk4g6gm40000gn/T/_MEIYRjNbS/QtCore (0x10efe8288). One of the two will be used. Which one is undefined.
                        QObject::moveToThread: Current thread (0x7faab1e065c0) is not the object's thread (0x7faab1c17ed0).
                        Cannot move to target thread (0x7faab1e065c0)
                        
                        You might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
                        qt.qpa.plugin: Could not load the Qt platform plugin "cocoa" in "" even though it was found.
                        This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                        
                        Available platform plugins are: cocoa, minimal, offscreen, webgl.
                        

                        This was the code I used:

                        launch = QProcess()
                        launch.startDetached(dolphinPath+"/Contents/MacOS/Dolphin")
                        
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                        • SGaistS SGaist

                          What if you use the QProcess::startDetached method ?

                          Benjamin HalkoB Offline
                          Benjamin HalkoB Offline
                          Benjamin Halko
                          wrote on last edited by
                          #17

                          @SGaist Oh by the way, this issue only occurs when the program is packaged with pyinstaller, running it regularly works just fine.

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #18

                            What exactly are you packaging ?

                            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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                            • Benjamin HalkoB Offline
                              Benjamin HalkoB Offline
                              Benjamin Halko
                              wrote on last edited by Benjamin Halko
                              #19

                              Here is my project folder. Here is the actual run dolphin function. Hope that helps.

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                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by SGaist
                                #20

                                Did you try to use Popen with shell=True ?

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

                                Benjamin HalkoB 1 Reply Last reply
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                                • SGaistS SGaist

                                  Did you try to use Popen with shell=True ?

                                  Benjamin HalkoB Offline
                                  Benjamin HalkoB Offline
                                  Benjamin Halko
                                  wrote on last edited by Benjamin Halko
                                  #21

                                  @SGaist It gave the same error LSOpenURLsWithRole() failed with error -10810 for the file /Users/benjamin/Desktop/Dolphin.app.

                                  Oh and I tried starting the .app not executable in /Contents/MacOS/

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                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #22

                                    Which version of Qt are your application and Dolphin using ?

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

                                    Benjamin HalkoB 1 Reply Last reply
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                                    • SGaistS SGaist

                                      Which version of Qt are your application and Dolphin using ?

                                      Benjamin HalkoB Offline
                                      Benjamin HalkoB Offline
                                      Benjamin Halko
                                      wrote on last edited by Benjamin Halko
                                      #23

                                      @SGaist I am using PyQt5 (I think version 5.12.2) And I have been informed that Dolphin uses 5.15.0 (C++). Although it seems that Dolphin uses this custom version ...maybe???

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                                      • SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #24

                                        You should try with both using the same version of Qt.

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

                                        Benjamin HalkoB 1 Reply Last reply
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                                        • Benjamin HalkoB Offline
                                          Benjamin HalkoB Offline
                                          Benjamin Halko
                                          wrote on last edited by Benjamin Halko
                                          #25

                                          My bad I was using PyQt5 version 5.15.5, but I will still try using Dolphins version.

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