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  4. How to show all UI from another python file in current file when button is clicked.

How to show all UI from another python file in current file when button is clicked.

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  • S SGaist
    17 Aug 2019, 21:53

    So you know how to import a class from another file. The same applies to the widgets you implement in a different file.

    mywidget.py:

    from PySide2.QtWidgets import QWidget
    
    class MyWidget(QWidget):
        """My Cool Widget"""
    
    def doSomething(self):
        """Do something cool"""
    
        print("Done something cool")
    

    main.py:

    import sys
    
    from PySide2.QtWidgets import QApplication
    
    from .mywidget import MyWidget
    
    if __name__ == "__main__":
        app = QApplication(sys.argv)
        widget = MyWidget()
        widget.show()
        sys.exit(app.exec_())
    
    S Offline
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    sdf1444
    wrote on 17 Aug 2019, 21:59 last edited by
    #7

    @sgaist

    Hi

    How would I import all classes and functions at the same time and show the widgets?

    1 Reply Last reply
    0
    • S SGaist
      17 Aug 2019, 21:53

      So you know how to import a class from another file. The same applies to the widgets you implement in a different file.

      mywidget.py:

      from PySide2.QtWidgets import QWidget
      
      class MyWidget(QWidget):
          """My Cool Widget"""
      
      def doSomething(self):
          """Do something cool"""
      
          print("Done something cool")
      

      main.py:

      import sys
      
      from PySide2.QtWidgets import QApplication
      
      from .mywidget import MyWidget
      
      if __name__ == "__main__":
          app = QApplication(sys.argv)
          widget = MyWidget()
          widget.show()
          sys.exit(app.exec_())
      
      S Offline
      S Offline
      sdf1444
      wrote on 17 Aug 2019, 22:15 last edited by
      #8

      @sgaist

      Hi how would I import all classes and functions at the same time when I have more than one widget I want to show from another file using pyqt2 instead of pyside2.

      Thanks

      1 Reply Last reply
      0
      • S Offline
        S Offline
        SGaist
        Lifetime Qt Champion
        wrote on 17 Aug 2019, 22:21 last edited by
        #9

        What exactly are you trying to achieve ? It looks as if you want to use something you know nothing about so please explain your use case.

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

        S 1 Reply Last reply 17 Aug 2019, 22:40
        1
        • S SGaist
          17 Aug 2019, 22:21

          What exactly are you trying to achieve ? It looks as if you want to use something you know nothing about so please explain your use case.

          S Offline
          S Offline
          sdf1444
          wrote on 17 Aug 2019, 22:40 last edited by
          #10

          @sgaist

          Hi

          I have three different types of widgets in a python file in the form of classes and functions and I want to know how I can import them all at once to another python file so that I can show them in the python file. I need to use pyqt5. Please give me examples. The types of widgets you use does not matter to me.

          Thanks

          1 Reply Last reply
          0
          • M Offline
            M Offline
            mrjj
            Lifetime Qt Champion
            wrote on 17 Aug 2019, 22:54 last edited by
            #11

            Hi
            Did you try something like
            from .name_of_file import *

            Also, did you see
            https://www.riverbankcomputing.com/static/Docs/PyQt5/

            S 1 Reply Last reply 17 Aug 2019, 22:59
            0
            • M mrjj
              17 Aug 2019, 22:54

              Hi
              Did you try something like
              from .name_of_file import *

              Also, did you see
              https://www.riverbankcomputing.com/static/Docs/PyQt5/

              S Offline
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              sdf1444
              wrote on 17 Aug 2019, 22:59 last edited by
              #12

              @mrjj

              Thanks I understand that now. But how would I show all the widgets once I have used the import statement.

              Thanks

              M 1 Reply Last reply 17 Aug 2019, 23:07
              0
              • S sdf1444
                17 Aug 2019, 22:59

                @mrjj

                Thanks I understand that now. But how would I show all the widgets once I have used the import statement.

                Thanks

                M Offline
                M Offline
                mrjj
                Lifetime Qt Champion
                wrote on 17 Aug 2019, 23:07 last edited by
                #13

                @sdf1444
                Hi
                There is no magic to it.
                The import merely makes the types (classes) known.
                You must create instances of the classes you wish to use

                widget = MyWidget()

                MyWidget will of cause be another name, depending on what you import.

                S 1 Reply Last reply 17 Aug 2019, 23:12
                0
                • M mrjj
                  17 Aug 2019, 23:07

                  @sdf1444
                  Hi
                  There is no magic to it.
                  The import merely makes the types (classes) known.
                  You must create instances of the classes you wish to use

                  widget = MyWidget()

                  MyWidget will of cause be another name, depending on what you import.

                  S Offline
                  S Offline
                  sdf1444
                  wrote on 17 Aug 2019, 23:12 last edited by
                  #14

                  @mrjj

                  What happens if I want to import the classes and functions but I don't know what the classes and functions are called.

                  Thanks

                  M 1 Reply Last reply 18 Aug 2019, 08:18
                  0
                  • S sdf1444
                    17 Aug 2019, 23:12

                    @mrjj

                    What happens if I want to import the classes and functions but I don't know what the classes and functions are called.

                    Thanks

                    M Offline
                    M Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on 18 Aug 2019, 08:18 last edited by mrjj
                    #15

                    @sdf1444
                    Then you open the py file and look what they are called ?
                    In any case, you need to know the classnames or function names to use them.
                    However, i think you can enumerate them as to list their names or similar in a list
                    https://stackoverflow.com/questions/1796180/how-can-i-get-a-list-of-all-classes-within-current-module-in-python
                    However, concrete names must be used to actually use them.

                    S 1 Reply Last reply 18 Aug 2019, 08:28
                    0
                    • M mrjj
                      18 Aug 2019, 08:18

                      @sdf1444
                      Then you open the py file and look what they are called ?
                      In any case, you need to know the classnames or function names to use them.
                      However, i think you can enumerate them as to list their names or similar in a list
                      https://stackoverflow.com/questions/1796180/how-can-i-get-a-list-of-all-classes-within-current-module-in-python
                      However, concrete names must be used to actually use them.

                      S Offline
                      S Offline
                      sdf1444
                      wrote on 18 Aug 2019, 08:28 last edited by
                      #16

                      @mrjj

                      So I must no the class names if I want to import them? There is no way to import and show all the classes without having to know what they are called?

                      Thanks

                      M 1 Reply Last reply 18 Aug 2019, 08:33
                      0
                      • S sdf1444
                        18 Aug 2019, 08:28

                        @mrjj

                        So I must no the class names if I want to import them? There is no way to import and show all the classes without having to know what they are called?

                        Thanks

                        M Offline
                        M Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on 18 Aug 2019, 08:33 last edited by
                        #17

                        @sdf1444
                        well you can use the * syntax to import all, but
                        you must create instances to show them so you cant say
                        "Import all and show them " as that is not how it works.
                        Also if the module contains multiple widgets. Then the only option it would
                        have was to show all widgets as separate windows as there would be no
                        way to know in what way to combine them into a single window.
                        However, the module could internally have multiple widgets defined and
                        and have one widget that uses the tother so you would only need to create
                        an instance of that one.

                        Can you explain why you seem to hook on not using the class names?

                        S 1 Reply Last reply 18 Aug 2019, 10:06
                        0
                        • M mrjj
                          18 Aug 2019, 08:33

                          @sdf1444
                          well you can use the * syntax to import all, but
                          you must create instances to show them so you cant say
                          "Import all and show them " as that is not how it works.
                          Also if the module contains multiple widgets. Then the only option it would
                          have was to show all widgets as separate windows as there would be no
                          way to know in what way to combine them into a single window.
                          However, the module could internally have multiple widgets defined and
                          and have one widget that uses the tother so you would only need to create
                          an instance of that one.

                          Can you explain why you seem to hook on not using the class names?

                          S Offline
                          S Offline
                          sdf1444
                          wrote on 18 Aug 2019, 10:06 last edited by
                          #18

                          @mrjj

                          Hi

                          I want to be able to import and show widgets from any other file in current python file but the condition is I have no idea what that file contains but I should be able to still show the widgets from that file. Please show me how to do this. As simple as possible would be great.

                          Thanks

                          1 Reply Last reply
                          0
                          • M Offline
                            M Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on 18 Aug 2019, 10:23 last edited by mrjj
                            #19

                            Hi
                            It seems you can use a string as class name and in that way maybe do it
                            with
                            https://stackoverflow.com/questions/553784/can-you-use-a-string-to-instantiate-a-class
                            combined with
                            https://stackoverflow.com/questions/1796180/how-can-i-get-a-list-of-all-classes-within-current-module-in-python
                            so you import module , build stringlist and
                            then use the

                             def construct(self, builderName):
                                    targetClass = getattr(idClasses, builderName)
                                    instance = targetClass()
                                    self.allClasses.append(instance)
                            

                            to actually construct a list of instances.

                            Then you can insert into your main window to show.

                            S 2 Replies Last reply 18 Aug 2019, 12:17
                            0
                            • M mrjj
                              18 Aug 2019, 10:23

                              Hi
                              It seems you can use a string as class name and in that way maybe do it
                              with
                              https://stackoverflow.com/questions/553784/can-you-use-a-string-to-instantiate-a-class
                              combined with
                              https://stackoverflow.com/questions/1796180/how-can-i-get-a-list-of-all-classes-within-current-module-in-python
                              so you import module , build stringlist and
                              then use the

                               def construct(self, builderName):
                                      targetClass = getattr(idClasses, builderName)
                                      instance = targetClass()
                                      self.allClasses.append(instance)
                              

                              to actually construct a list of instances.

                              Then you can insert into your main window to show.

                              S Offline
                              S Offline
                              sdf1444
                              wrote on 18 Aug 2019, 12:17 last edited by
                              #20

                              @mrjj

                              Hi could you give me a full working code because I still dont know how to do it based on your suggestions. Also I really appreciate all your suggestions.

                              Thanks

                              1 Reply Last reply
                              0
                              • S Offline
                                S Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on 18 Aug 2019, 19:03 last edited by
                                #21

                                @sdf1444 you do realise that you are basically asking us to do your work for you ? You were already given several good starting points but you didn't even show anything you tried to get things working.

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

                                S 1 Reply Last reply 19 Aug 2019, 08:24
                                1
                                • S SGaist
                                  18 Aug 2019, 19:03

                                  @sdf1444 you do realise that you are basically asking us to do your work for you ? You were already given several good starting points but you didn't even show anything you tried to get things working.

                                  S Offline
                                  S Offline
                                  sdf1444
                                  wrote on 19 Aug 2019, 08:24 last edited by sdf1444
                                  #22

                                  @sgaist

                                  Hi

                                  Here is some code to display widgets in pyqt5. But how do I allow the code so that it displays the imported widget from another file in the same python file/window without creating a new window for the new widget.

                                  pyqt.py

                                  import sys
                                  from PyQt5.QtWidgets import *
                                  from PyQt5.QtCore import *
                                  from pyqt2 import *    
                                  
                                  class App(QWidget):
                                      def __init__(self):
                                          QMainWindow.__init__(self)
                                  
                                          pybutton = QPushButton('Click me', self)
                                          pybutton.resize(200,70)
                                          pybutton.move(400, 50)
                                          self.show()
                                  
                                  if __name__ == "__main__":
                                      app = QApplication(sys.argv)
                                      mainWin = App()
                                      mainWin2 = App2() 
                                      sys.exit(app.exec_())
                                  

                                  Here is also the code for the imported python file:

                                  pyqt2.py

                                  import sys
                                  from PyQt5.QtWidgets import *
                                  from PyQt5.QtCore import *    
                                  
                                  class App2(QWidget):
                                      def __init__(self):
                                          QMainWindow.__init__(self)
                                  
                                          pybutton = QPushButton('hi', self)
                                          pybutton.resize(200,70)
                                          pybutton.move(900, 50)
                                          self.show()
                                  
                                  1 Reply Last reply
                                  0
                                  • M mrjj
                                    18 Aug 2019, 10:23

                                    Hi
                                    It seems you can use a string as class name and in that way maybe do it
                                    with
                                    https://stackoverflow.com/questions/553784/can-you-use-a-string-to-instantiate-a-class
                                    combined with
                                    https://stackoverflow.com/questions/1796180/how-can-i-get-a-list-of-all-classes-within-current-module-in-python
                                    so you import module , build stringlist and
                                    then use the

                                     def construct(self, builderName):
                                            targetClass = getattr(idClasses, builderName)
                                            instance = targetClass()
                                            self.allClasses.append(instance)
                                    

                                    to actually construct a list of instances.

                                    Then you can insert into your main window to show.

                                    S Offline
                                    S Offline
                                    sdf1444
                                    wrote on 19 Aug 2019, 08:34 last edited by sdf1444
                                    #23

                                    @mrjj

                                    Hi

                                    Here is some code to display widgets in pyqt5. But how do I allow the code so that it displays the imported widget from another file in the same python file/window without creating a new window for the new widget.

                                    pyqt.py

                                    import sys
                                    from PyQt5.QtWidgets import *
                                    from PyQt5.QtCore import *
                                    from pyqt2 import *
                                    class App(QWidget):
                                    def init(self):
                                    QMainWindow.init(self)
                                        pybutton = QPushButton('Click me', self)
                                        pybutton.resize(200,70)
                                        pybutton.move(400, 50)
                                        self.show()
                                    if name == "main":
                                    app = QApplication(sys.argv)
                                    mainWin = App()
                                    mainWin2 = App2()
                                    sys.exit(app.exec_())
                                    

                                    Here is also the code for the imported python file:

                                    pyqt2.py

                                    import sys
                                    from PyQt5.QtWidgets import *
                                    from PyQt5.QtCore import *
                                    
                                    class App2(QWidget):
                                    def init(self):
                                    QMainWindow.init(self)
                                        pybutton = QPushButton('hi', self)
                                        pybutton.resize(200,70)
                                        pybutton.move(900, 50)
                                        self.show()
                                    
                                    1 Reply Last reply
                                    0
                                    • M Offline
                                      M Offline
                                      mrjj
                                      Lifetime Qt Champion
                                      wrote on 19 Aug 2019, 08:38 last edited by
                                      #24

                                      Hi
                                      Widgets that do not get a parent assigned, will become windows.
                                      So normally you would insert the imported widgets into a
                                      layout on the mainwindow.

                                      S 1 Reply Last reply 19 Aug 2019, 08:46
                                      0
                                      • M mrjj
                                        19 Aug 2019, 08:38

                                        Hi
                                        Widgets that do not get a parent assigned, will become windows.
                                        So normally you would insert the imported widgets into a
                                        layout on the mainwindow.

                                        S Offline
                                        S Offline
                                        sdf1444
                                        wrote on 19 Aug 2019, 08:46 last edited by
                                        #25

                                        @mrjj

                                        Hi

                                        How do I do this? What is the code for this because I really don't understand how to do it.

                                        Thanks very much much appreciated with also your help.

                                        M 1 Reply Last reply 19 Aug 2019, 08:51
                                        0
                                        • S sdf1444
                                          19 Aug 2019, 08:46

                                          @mrjj

                                          Hi

                                          How do I do this? What is the code for this because I really don't understand how to do it.

                                          Thanks very much much appreciated with also your help.

                                          M Offline
                                          M Offline
                                          mrjj
                                          Lifetime Qt Champion
                                          wrote on 19 Aug 2019, 08:51 last edited by
                                          #26

                                          @sdf1444
                                          well something like
                                          layout = QHBoxLayout()
                                          layout.addWidget(button1) // button1 would be your imported widget instance

                                          window.setLayout(layout)
                                          window.show()

                                          window most like being mainwindow

                                          its a good idea to read about layouts
                                          https://doc.qt.io/qtforpython/overviews/layout.html
                                          so you know what you are using :)

                                          S 2 Replies Last reply 19 Aug 2019, 09:02
                                          0

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