keypressevent with pyqt4

[coldlin]

Hi to all!!
I'm new with python and qt, and i'm trying to make my program,written with pyqt4 in linux, execute some code when I press a keyboard button. I can't understand how to implement the keyPressEvent in my program
Searching with google i found this:

class Test(QtGui.QTextEdit):
     def keyPressEvent(self, e):
          print e.key()
          e.ignore()

class Test(QtGui.QTextEdit):
     def keyPressEvent(self, e):
          print e.key()
          e.ignore()

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but this won't work to me, 'cause it declares a QTextEdit class, but i use a QWidget, so the .key() doesn't work
How can I do?? Thaks to all!!!

P.S. Sorry for the ignorance and the english.

[jpn]

'cause it declares a QTextEdit class, but i use a QWidget, so the .key() doesn't work

But key() is a method of QtGui.QKeyEvent, not QTextEdit nor QWidget..

[coldlin]

but if i use the key() with qwidget it doesn't work. I can't post the error now, i'll post it later if it could help.

[coldlin]

I tried to change the test's class from QTextEdit and QWidget and it actually works!
But... I think I have some focus problem, 'cause in my main class it doesn't work.

I tried to set focuspolicy to tabfocus, focus to tabfocusreason, with no advantage.
I tried grabkeyboard() but it says

X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 31 (X_GrabKeyboard)
  Resource id:  0x0

X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 31 (X_GrabKeyboard)
  Resource id:  0x0

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what could I do?