PyQt4 example working from IDLE, but not when exec

问题:

I am running a very basic example in PyQt4. It is shown below. I was struggling with the Enthought Canopy installation, struggling with the cygwin Python implementation, and finally just installed Python 2.7, Numpy 1.7.1, MatPlotLib 1.2.0 one at a time.

When I execute the example from IDLE, it works fine. Although when I try to execute it from Notepad++ using nppExec, the console window just hangs. I do not see a little empty window pop up anywhere, nor am I given any error codes.

• I tried interactive mode and non-interactive mode from nppExec (-i)
  • My nppExec command is python "$(FULL_CURRENT_PATH)"
• I tried pulling the guts of tho code out of the function definition and running it by itself, same thing.

.

• Python 2.7.4
• notepad++ 6.3.2

• PyQt4 4.10.1

  import sys
  from PyQt4 import QtGui
  
  
  def main():
  
      app = QtGui.QApplication(sys.argv)
  
      w = QtGui.QWidget()
      w.resize(250, 150)
      w.move(300, 300)
      w.setWindowTitle('Brian')
      w.show()
  
  sys.exit(app.exec_())
  
  
  if __name__ == '__main__':
      main()
  

回答1:

In NppExec, use the command

CMD /C python -u "$(FULL_CURRENT_PATH)"

instead of

python "$(FULL_CURRENT_PATH)"

回答2:

I had/have the same issue. Using w.showMaximized() instead of w.show() solved for me the problem of not showing the window in Notepad++. Subsequent opened widgets can be opened with w.show().

However, your code did not work for me, I got a Python traceback. Instead I used (with PySide):

import sys
from PySide import QtGui

app = QtGui.QApplication(sys.argv)

def main():

    w = QtGui.QWidget()
    w.resize(250, 150)
    w.move(300, 300)
    w.setWindowTitle('Brian')
    w.showMaximized()
    app.exec_()


if __name__ == '__main__':
    main()

And, as a work-around, just add something like w.resize(width, height) after you called w.showMaximized() to resize the window to your target size.