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How to run external QT program from PyQT5 on MacOS

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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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                                • SGaistS SGaist

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

                                  Benjamin HalkoB Offline
                                  Benjamin HalkoB Offline
                                  Benjamin Halko
                                  wrote on last edited by Benjamin Halko
                                  #26

                                  @SGaist Ok so I update PyQt5 and I used ['open', '/Users/benjamin/Desktop/Dolphin.app/Contents/MacOS/Dolphin'],shell=False and it worked!
                                  But then when I went to use ['open', '/Users/benjamin/Desktop/Dolphin.app/Contents/MacOS/Dolphin', '--args', '-e', gamePath],shell=False to try to load a game, it gave me the open command usage dialog. Is there something wrong with using --args?
                                  Also I tried things like opening with just /Users/benjamin/Desktop/Dolphin.app or using shell=True but they also didn't work...

                                  I wonder if the arguments for Dolphin only work when running from the Dolphin.app and not the /Contents.... one.
                                  Took a look and yep, the /Contents one doesn't support arguments...

                                  jsulmJ 1 Reply Last reply
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                                  • Benjamin HalkoB Benjamin Halko

                                    @SGaist Ok so I update PyQt5 and I used ['open', '/Users/benjamin/Desktop/Dolphin.app/Contents/MacOS/Dolphin'],shell=False and it worked!
                                    But then when I went to use ['open', '/Users/benjamin/Desktop/Dolphin.app/Contents/MacOS/Dolphin', '--args', '-e', gamePath],shell=False to try to load a game, it gave me the open command usage dialog. Is there something wrong with using --args?
                                    Also I tried things like opening with just /Users/benjamin/Desktop/Dolphin.app or using shell=True but they also didn't work...

                                    I wonder if the arguments for Dolphin only work when running from the Dolphin.app and not the /Contents.... one.
                                    Took a look and yep, the /Contents one doesn't support arguments...

                                    jsulmJ Offline
                                    jsulmJ Offline
                                    jsulm
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #27

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

                                    Is there something wrong with using --args?

                                    I don't know.
                                    What exactly does "command usage dialog" tell you? You're probably using --args wrongly.

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

                                    Benjamin HalkoB 1 Reply Last reply
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                                    • jsulmJ jsulm

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

                                      Is there something wrong with using --args?

                                      I don't know.
                                      What exactly does "command usage dialog" tell you? You're probably using --args wrongly.

                                      Benjamin HalkoB Offline
                                      Benjamin HalkoB Offline
                                      Benjamin Halko
                                      wrote on last edited by Benjamin Halko
                                      #28

                                      @jsulm It is just what it gives you when you just type open.

                                      Also, when launching the .app from Python, Dolphin starts then immediately crashes with this error message using Apples Crash Message Screen Thing: https://pastebin.com/NqBK0YvQ (It also shows LSOpenURLsWithRole() failed with error -10810 for the file /Users/benjamin/Desktop/Dolphin.app. in the terminal window)

                                      jsulmJ 1 Reply Last reply
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                                      • Benjamin HalkoB Benjamin Halko

                                        @jsulm It is just what it gives you when you just type open.

                                        Also, when launching the .app from Python, Dolphin starts then immediately crashes with this error message using Apples Crash Message Screen Thing: https://pastebin.com/NqBK0YvQ (It also shows LSOpenURLsWithRole() failed with error -10810 for the file /Users/benjamin/Desktop/Dolphin.app. in the terminal window)

                                        jsulmJ Offline
                                        jsulmJ Offline
                                        jsulm
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #29

                                        @Benjamin-Halko As I said you first need to find out how to call Dolphin properly.
                                        Try to pass it -h parameter to get more information.

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

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