Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. Qt for Python
  4. PyQT4 App
Forum Updated to NodeBB v4.3 + New Features

PyQT4 App

Scheduled Pinned Locked Moved Unsolved Qt for Python
42 Posts 4 Posters 9.5k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • JonBJ JonB

    @Mitko
    You should only get the same error if you left the code with QtGui.QVBoxLayout(self.centralWidget). After the import it should work with plain QVBoxLayout(self.centralWidget). Otherwise please don't say " same error" when so many errors are flying around, please show the actual line of any error and paste the error message.

    M Offline
    M Offline
    Mitko
    wrote on last edited by
    #26

    @JonB

    When i use:

    from PyQt5 import QtWidgets, QtCore, QtGui, QVBoxLayout
    

    I have this:

    File "C:/xbee-gui-master/MainForm.py", line 3, in <module>
     from PyQt5 import QtWidgets, QtCore, QtGui, QVBoxLayout
    ImportError: cannot import name 'QVBoxLayout' from 'PyQt5' (C:\xbee-gui-master\PyQT\lib\site-packages\PyQt5\__init__.py)
    

    When i use:

    from PyQt5 import QtWidgets, QtCore, QtGui
    
    from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, QHBoxLayout,
                                 QPushButton, QLabel, QLineEdit, QTabBar,
                                 QFrame, QStackedLayout)
    

    I have this:

    File "C:/xbee-gui-master/MainForm.py", line 35, in __init__
       self.centralWidgetLayout = QtGui.QVBoxLayout(self.centralWidget)
    AttributeError: module 'PyQt5.QtGui' has no attribute 'QVBoxLayout'
    
    JonBJ 1 Reply Last reply
    0
    • M Mitko

      @JonB

      When i use:

      from PyQt5 import QtWidgets, QtCore, QtGui, QVBoxLayout
      

      I have this:

      File "C:/xbee-gui-master/MainForm.py", line 3, in <module>
       from PyQt5 import QtWidgets, QtCore, QtGui, QVBoxLayout
      ImportError: cannot import name 'QVBoxLayout' from 'PyQt5' (C:\xbee-gui-master\PyQT\lib\site-packages\PyQt5\__init__.py)
      

      When i use:

      from PyQt5 import QtWidgets, QtCore, QtGui
      
      from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, QHBoxLayout,
                                   QPushButton, QLabel, QLineEdit, QTabBar,
                                   QFrame, QStackedLayout)
      

      I have this:

      File "C:/xbee-gui-master/MainForm.py", line 35, in __init__
         self.centralWidgetLayout = QtGui.QVBoxLayout(self.centralWidget)
      AttributeError: module 'PyQt5.QtGui' has no attribute 'QVBoxLayout'
      
      JonBJ Offline
      JonBJ Offline
      JonB
      wrote on last edited by JonB
      #27

      @Mitko
      The first error is correct. from PyQt5 import QtWidgets, QtCore, QtGui is good. QVBoxLayout is not in PyQt5, so the error is correct.

      Your second example is correct. QtWidgets does contain QVBoxLayout so that is good.

      Given which, it is hardly surprising that

      self.centralWidgetLayout = QtGui.QVBoxLayout(self.centralWidget)
      

      gives the error it does, is it? You know that QVBoxLayout has been moved from QtGui in Qt 4 to QtWidgets in Qt 5, don't you, because that is what you are supposed to be changing to make it work. So there's no point putting what used to work and does not work now.

      Given your second example code, there are two ways you can address QVBoxLayout:

      • QtWidgets.QVBoxLayout: This is allowed from your from PyQt5 import QtWidgets line.

      • QVBoxLayout: This is allowed from your from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, ... line.

      M 1 Reply Last reply
      1
      • JonBJ JonB

        @Mitko
        The first error is correct. from PyQt5 import QtWidgets, QtCore, QtGui is good. QVBoxLayout is not in PyQt5, so the error is correct.

        Your second example is correct. QtWidgets does contain QVBoxLayout so that is good.

        Given which, it is hardly surprising that

        self.centralWidgetLayout = QtGui.QVBoxLayout(self.centralWidget)
        

        gives the error it does, is it? You know that QVBoxLayout has been moved from QtGui in Qt 4 to QtWidgets in Qt 5, don't you, because that is what you are supposed to be changing to make it work. So there's no point putting what used to work and does not work now.

        Given your second example code, there are two ways you can address QVBoxLayout:

        • QtWidgets.QVBoxLayout: This is allowed from your from PyQt5 import QtWidgets line.

        • QVBoxLayout: This is allowed from your from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, ... line.

        M Offline
        M Offline
        Mitko
        wrote on last edited by
        #28

        @JonB

        Hi, i'm really grateful for your help so far.

        I managed to clear that types of errors.

        But now i have different types of error:

         C:\xbee-gui-master\PyQT\Scripts\python.exe C:/xbee-gui-master/MainForm.py
        Traceback (most recent call last):
          File "C:/xbee-gui-master/MainForm.py", line 367, in <module>
            main()
          File "C:/xbee-gui-master/MainForm.py", line 362, in main
            bl = Block()
          File "C:/xbee-gui-master/MainForm.py", line 50, in __init__
            self.all_tab()
          File "C:/xbee-gui-master/MainForm.py", line 63, in all_tab
            self.tab_control()
          File "C:/xbee-gui-master/MainForm.py", line 160, in tab_control
            self.list_all_commands()
          File "C:/xbee-gui-master/MainForm.py", line 211, in list_all_commands
            self.connect(self.view, QtCore.SIGNAL("clicked(const QModelIndex&)"), on_item_clicked)
        AttributeError: 'Block' object has no attribute 'connect' 
        

        Can you please help me ?

        JonBJ 1 Reply Last reply
        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #29

          You wrote as if it was C++. That's wrong.

          With PyQt/PySide:

          source_object.name_of_signal.connect(target_object.name_of_slot)
          

          Replace source_object and target_object with suitable objects in your code.

          Note that in the project your linked to, there are several connect statements already done.

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

          1 Reply Last reply
          1
          • M Mitko

            @JonB

            Hi, i'm really grateful for your help so far.

            I managed to clear that types of errors.

            But now i have different types of error:

             C:\xbee-gui-master\PyQT\Scripts\python.exe C:/xbee-gui-master/MainForm.py
            Traceback (most recent call last):
              File "C:/xbee-gui-master/MainForm.py", line 367, in <module>
                main()
              File "C:/xbee-gui-master/MainForm.py", line 362, in main
                bl = Block()
              File "C:/xbee-gui-master/MainForm.py", line 50, in __init__
                self.all_tab()
              File "C:/xbee-gui-master/MainForm.py", line 63, in all_tab
                self.tab_control()
              File "C:/xbee-gui-master/MainForm.py", line 160, in tab_control
                self.list_all_commands()
              File "C:/xbee-gui-master/MainForm.py", line 211, in list_all_commands
                self.connect(self.view, QtCore.SIGNAL("clicked(const QModelIndex&)"), on_item_clicked)
            AttributeError: 'Block' object has no attribute 'connect' 
            

            Can you please help me ?

            JonBJ Offline
            JonBJ Offline
            JonB
            wrote on last edited by
            #30

            @Mitko

            self.connect(self.view, QtCore.SIGNAL("clicked(const QModelIndex&)"), on_item_clicked)
            

            That is the original.

            • I have never heard of self.connect().

            • I doubt that QtCore.SIGNAL("clicked(const QModelIndex&)") is acceptable, but I don't know.

            I would try

            self.view.clicked.connect(on_item_clicked)
            

            Meanwhile separately I note that the code has:

            class Block(QtGui.QMainWindow, QtGui.QTreeView):
            

            That means Block is derived from two QObjects, QMainWindow & QTreeView. This is explicitly forbidden in Qt, at least in Qt5 and/or C++. Maybe it worked in Qt4/PyQt4, but will not now in any circumstances....

            Meanwhile, I don't know why you couldn't find this for yourself but isn't https://github.com/RuslanSdk/XBee-PyQt5-V.1.0 like it says Qt5/PyQt5 and what you want?

            M 1 Reply Last reply
            1
            • JonBJ JonB

              @Mitko

              self.connect(self.view, QtCore.SIGNAL("clicked(const QModelIndex&)"), on_item_clicked)
              

              That is the original.

              • I have never heard of self.connect().

              • I doubt that QtCore.SIGNAL("clicked(const QModelIndex&)") is acceptable, but I don't know.

              I would try

              self.view.clicked.connect(on_item_clicked)
              

              Meanwhile separately I note that the code has:

              class Block(QtGui.QMainWindow, QtGui.QTreeView):
              

              That means Block is derived from two QObjects, QMainWindow & QTreeView. This is explicitly forbidden in Qt, at least in Qt5 and/or C++. Maybe it worked in Qt4/PyQt4, but will not now in any circumstances....

              Meanwhile, I don't know why you couldn't find this for yourself but isn't https://github.com/RuslanSdk/XBee-PyQt5-V.1.0 like it says Qt5/PyQt5 and what you want?

              M Offline
              M Offline
              Mitko
              wrote on last edited by
              #31

              @JonB

              I think i fix this:

              self.view.clicked.connect(on_item_clicked)
              

              About the "Block" error - is there some Qt5 replacement ?

              About the project you refer to - i've tried it and it can be runned, but it can't load more then one xbee modules, and i wish to establish a network with meny devices.
              I tried to contact the creator, but he don't reply.

              Meanwhile i have new errors:

               C:\xbee-gui-master\PyQT\Scripts\python.exe C:/xbee-gui-master/MainForm.py
              Traceback (most recent call last):
                File "C:/xbee-gui-master/MainForm.py", line 367, in <module>
                  main()
                File "C:/xbee-gui-master/MainForm.py", line 362, in main
                  bl = Block()
                File "C:/xbee-gui-master/MainForm.py", line 50, in __init__
                  self.all_tab()
                File "C:/xbee-gui-master/MainForm.py", line 63, in all_tab
                  self.tab_control()
                File "C:/xbee-gui-master/MainForm.py", line 174, in tab_control
                  model = QtWidgets.QStringListModel()
              AttributeError: module 'PyQt5.QtWidgets' has no attribute 'QStringListModel'
              

              Any help, please ?

              JonBJ 1 Reply Last reply
              0
              • M Mitko

                @JonB

                I think i fix this:

                self.view.clicked.connect(on_item_clicked)
                

                About the "Block" error - is there some Qt5 replacement ?

                About the project you refer to - i've tried it and it can be runned, but it can't load more then one xbee modules, and i wish to establish a network with meny devices.
                I tried to contact the creator, but he don't reply.

                Meanwhile i have new errors:

                 C:\xbee-gui-master\PyQT\Scripts\python.exe C:/xbee-gui-master/MainForm.py
                Traceback (most recent call last):
                  File "C:/xbee-gui-master/MainForm.py", line 367, in <module>
                    main()
                  File "C:/xbee-gui-master/MainForm.py", line 362, in main
                    bl = Block()
                  File "C:/xbee-gui-master/MainForm.py", line 50, in __init__
                    self.all_tab()
                  File "C:/xbee-gui-master/MainForm.py", line 63, in all_tab
                    self.tab_control()
                  File "C:/xbee-gui-master/MainForm.py", line 174, in tab_control
                    model = QtWidgets.QStringListModel()
                AttributeError: module 'PyQt5.QtWidgets' has no attribute 'QStringListModel'
                

                Any help, please ?

                JonBJ Offline
                JonBJ Offline
                JonB
                wrote on last edited by JonB
                #32

                @Mitko
                Now it's time for you to do the looking up. These questions are the same each time, and I don't see why I should look up the documentation for you.

                The error tells you why you can't write QtWidgets.QStringListModel(). So you need to find whatever module QStringListModel() is in.

                M 2 Replies Last reply
                2
                • JonBJ JonB

                  @Mitko
                  Now it's time for you to do the looking up. These questions are the same each time, and I don't see why I should look up the documentation for you.

                  The error tells you why you can't write QtWidgets.QStringListModel(). So you need to find whatever module QStringListModel() is in.

                  M Offline
                  M Offline
                  Mitko
                  wrote on last edited by
                  #33

                  @JonB
                  Since you saw that i'm now to this, can't you just say:

                  ''QStringListModel is a QtCore class, not QtWidgets'' ?

                  JonBJ jsulmJ 2 Replies Last reply
                  0
                  • JonBJ JonB

                    @Mitko
                    Now it's time for you to do the looking up. These questions are the same each time, and I don't see why I should look up the documentation for you.

                    The error tells you why you can't write QtWidgets.QStringListModel(). So you need to find whatever module QStringListModel() is in.

                    M Offline
                    M Offline
                    Mitko
                    wrote on last edited by
                    #34

                    @JonB
                    Any way... I run it.

                    But when i try to make test, it can't obtain xbee modules, and when i hit the ''compound'' button, the app don't respond.

                    Xbee-gui error.jpg

                    1 Reply Last reply
                    0
                    • M Mitko

                      @JonB
                      Since you saw that i'm now to this, can't you just say:

                      ''QStringListModel is a QtCore class, not QtWidgets'' ?

                      JonBJ Offline
                      JonBJ Offline
                      JonB
                      wrote on last edited by JonB
                      #35

                      @Mitko said in PyQT4 App:

                      Since you saw that i'm now to this, can't you just say:
                      ''QStringListModel is a QtCore class, not QtWidgets'' ?

                      Since you saw how much help/time I've spent on this for you, given that I told you I am no Qt expert and it's just a question of you making the effort to actually just Google instead of me making that effort for your program, can't you just say:
                      "Thanks for all the help so far, you're quite right I can type that into Google, no reason why should do that for me"
                      ?

                      So your attitude is the more I help the more I should help, to save you effort, else I'm not doing the job I owe you? Find someone else.

                      M 1 Reply Last reply
                      1
                      • JonBJ JonB

                        @Mitko said in PyQT4 App:

                        Since you saw that i'm now to this, can't you just say:
                        ''QStringListModel is a QtCore class, not QtWidgets'' ?

                        Since you saw how much help/time I've spent on this for you, given that I told you I am no Qt expert and it's just a question of you making the effort to actually just Google instead of me making that effort for your program, can't you just say:
                        "Thanks for all the help so far, you're quite right I can type that into Google, no reason why should do that for me"
                        ?

                        So your attitude is the more I help the more I should help, to save you effort, else I'm not doing the job I owe you? Find someone else.

                        M Offline
                        M Offline
                        Mitko
                        wrote on last edited by
                        #36

                        @JonB

                        I already said:
                        ''Hi, i'm really grateful for your help so far''.

                        About the effort:
                        I don't have problems with efforts, i just don't understand the QT, and just needed little help for better understanding the details.

                        And again- Thank you all !!!

                        SGaistS 1 Reply Last reply
                        0
                        • M Mitko

                          @JonB

                          I already said:
                          ''Hi, i'm really grateful for your help so far''.

                          About the effort:
                          I don't have problems with efforts, i just don't understand the QT, and just needed little help for better understanding the details.

                          And again- Thank you all !!!

                          SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #37

                          @Mitko You do realize that in in the case of the "has no attribute XXX" error, several people explained to you that some classes have moved from one module to another and that the information can be found on the class documentation. Hence the only thing you have to do with that error is go to the class documentation to get the module you need to import that class from.

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

                          M 1 Reply Last reply
                          1
                          • SGaistS SGaist

                            @Mitko You do realize that in in the case of the "has no attribute XXX" error, several people explained to you that some classes have moved from one module to another and that the information can be found on the class documentation. Hence the only thing you have to do with that error is go to the class documentation to get the module you need to import that class from.

                            M Offline
                            M Offline
                            Mitko
                            wrote on last edited by
                            #38

                            @SGaist
                            Like i said, i'm not familiar enough with Qt, in order to understand this details.

                            JonBJ 1 Reply Last reply
                            0
                            • M Mitko

                              @SGaist
                              Like i said, i'm not familiar enough with Qt, in order to understand this details.

                              JonBJ Offline
                              JonBJ Offline
                              JonB
                              wrote on last edited by
                              #39

                              @Mitko
                              For the record, these are purely Python errors. You would get the same errors in the same circumstances in Python with any module, nothing special about Qt. So this is an issue of Python knowledge/understanding.

                              1 Reply Last reply
                              0
                              • M Mitko

                                @JonB
                                Since you saw that i'm now to this, can't you just say:

                                ''QStringListModel is a QtCore class, not QtWidgets'' ?

                                jsulmJ Offline
                                jsulmJ Offline
                                jsulm
                                Lifetime Qt Champion
                                wrote on last edited by jsulm
                                #40

                                @Mitko said in PyQT4 App:

                                Since you saw that i'm now to this, can't you just say:

                                And can't you find it out by yourself?
                                You already asked these kind of questions and were told how to find this information.
                                Why should others do the research for you all the time?

                                The fact that you are a beginner doesn't mean that you should not learn how to find needed information after you were told several times how to do so...

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

                                M 1 Reply Last reply
                                1
                                • jsulmJ jsulm

                                  @Mitko said in PyQT4 App:

                                  Since you saw that i'm now to this, can't you just say:

                                  And can't you find it out by yourself?
                                  You already asked these kind of questions and were told how to find this information.
                                  Why should others do the research for you all the time?

                                  The fact that you are a beginner doesn't mean that you should not learn how to find needed information after you were told several times how to do so...

                                  M Offline
                                  M Offline
                                  Mitko
                                  wrote on last edited by
                                  #41

                                  @jsulm

                                  As I said:
                                  I still don't understand enough the details.

                                  1 Reply Last reply
                                  0
                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #42

                                    As we suggested: read the class documentation

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

                                    1 Reply Last reply
                                    1

                                    • Login

                                    • Login or register to search.
                                    • First post
                                      Last post
                                    0
                                    • Categories
                                    • Recent
                                    • Tags
                                    • Popular
                                    • Users
                                    • Groups
                                    • Search
                                    • Get Qt Extensions
                                    • Unsolved