pyqt4 - can't seem to fix PyCharm warnings in a simple PyQt program -

the following program (an extract of real code)

from pyqt4 import qtgui import sys pyqt4.qtgui import qmessagebox   def main():     app = qtgui.qapplication([])      w = qtgui.qpushbutton("test")      def on_pressed():         print("pressed")         qmessagebox.warning(w, 'info', 'button pressed')      w.pressed.connect(on_pressed)     w.show()      sys.exit(app.exec_())   if __name__ == '__main__':     main() 

triggers following 3 warnings in pycharm (eg when running code/inspect code... ) related qmessagebox.warning call

• calling method class using instance of different class; passing pyqt4.qtgui.qpushbutton.qpushbutton instead of pyqt4.qtgui.qmessagebox.qmessagebox. intentional?

• incorrect call arguments; parameter 'qstring_1' unfilled

• type checker; expected type 'qmessagebox', got 'qpushbutton' instead

and 1 warning related pyqt connect call

• cannot find reference 'connect' in 'function'

any idea how can work-around/avoid these warnings?