ImportError: cannot import name QtGui

Question

I installed Qt5.3(32 bit) installer on my linux 32 bit computer.

• Then i installed last version of sip - sip4.16.4

• Then i installed last version of pyqt - PyQt-x11-gpl-4.11.3.tar.gz from http://www.riverbankcomputing.co.uk/software/pyqt/download

• In my computer python2.7 and python3.2 versions are installed. When i try to install with python2.7, i took some errors. Then i tried to install it with pthon3.2. No errors happened, and i installed it correctly using python3.2

• I installed both py2.7-dev and py3.2-dev package.

• gdb,gcc,g++,python2.7,python3.2,build-essential all is installed in my computer.

• I installed Qt Designer from the Software Center.

• Then i put a simple button following the instructions of the tutorial : http://www.youtube.com/watch?v=GLqrzLIIW2E

• Then, i save the example.ui

• Then, I give the following command in terminal: pyuic4 example.ui > example.py . It converted the .ui file to .py file. Then i make the necessary modifications told in the youtube tutorial i told above.

- When i run the final version of the python file with python3.2, it gives the error:

Traceback (most recent call last):
  File "outFile_ui.py", line 12, in <module>
    from PyQt4 import QtCore, QtGui
ImportError: cannot import name QtGui

- Why i am taking this error? I think the problem is at nonmatching version,or installation etc. But i installed again and again. Nothing changed unfortunately. I searched all about the problem on the web. Similar problems exist,however none of them worked for me.

• If you want to see the python file which i run on the terminal, it is :

  from PyQt4 import QtCore, QtGui
  
  import sys
  
  try:
      _fromUtf8 = QtCore.QString.fromUtf8
  except AttributeError:
      def _fromUtf8(s):
          return s
  
  try:
      _encoding = QtGui.QApplication.UnicodeUTF8
      def _translate(context, text, disambig):
          return QtGui.QApplication.translate(context, text, disambig, _encoding)
  except AttributeError:
      def _translate(context, text, disambig):
          return QtGui.QApplication.translate(context, text, disambig)
  
  
  
  class Ui_Form(QtGui.QWidget):
      def __init__(self):
          QtGui.QWidget.__init__(self)
          self.setupUi(self)
      def setupUi(self, Form):
          Form.setObjectName(_fromUtf8("Form"))
          Form.resize(400, 300)
          self.horizontalLayout = QtGui.QHBoxLayout(Form)
          self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
          self.verticalLayout = QtGui.QVBoxLayout()
          self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
          self.printHam_btn = QtGui.QPushButton(Form)
          self.printHam_btn.setObjectName(_fromUtf8("printHam_btn"))
          self.verticalLayout.addWidget(self.printHam_btn)
          self.horizontalLayout.addLayout(self.verticalLayout)
  
          self.retranslateUi(Form)
          QtCore.QMetaObject.connectSlotsByName(Form)
  
      def retranslateUi(self, Form):
          Form.setWindowTitle(_translate("Form", "Super Ham", None))
          self.printHam_btn.setText(_translate("Form", "Print HAm", None))
          self.printHam_btn.clicked.connect(self.printHam)
  
      def printHam(self):
          print ("Ham!")
  
  
      if __name__ == '__main__':
          app = QtGui.QApplication(sys.argv)
          ex = Ui_Form()
          ex.show()
          sys.exit(app.exec_())
  

Answer 1

After converting .ui to .py code, it is required to add a main function. After main function is added properly, it runs perfectly.