python - Opening a child dialog window from a main window with Pyside -

so i've started learning python pyside gui development, have been using qt designer speed , converting .ui files .py

i have "main window" ui , "about" ui (main window setup main window , empty dialog)

how open dialog main window? following code opens main window main.py

class mainwindow(qmainwindow, mainwindow.ui_mainwindow): def __init__(self, parent=none):     super(mainwindow, self).__init__(parent)     self.setupui(self)  app = qapplication(sys.argv) form = mainwindow() form.show()  app.exec_() 

that works fine, brings main window. in main window there menu items, 1 of "about" selection when user clicks want bring other dialog ui created, how can this?

in mainwindow.py (converted ui) there these references:

self.actionabout_mailer_0_0_1 = qtgui.qaction(mainwindow) self.actionabout_mailer_0_0_1.setobjectname("actionabout_mailer_0_0_1") self.menuabout.addaction(self.actionabout_mailer_0_0_1) 

and about.py (converted ui) looks this:

from pyside import qtcore, qtgui  class about_dialog(object): def setupui(self, dialog):     dialog.setobjectname("dialog")     dialog.resize(400, 300)     self.aboutlbl = qtgui.qlabel(dialog)     self.aboutlbl.setgeometry(qtcore.qrect(110, 40, 171, 16))     self.aboutlbl.setobjectname("aboutlbl")      self.retranslateui(dialog)     qtcore.qmetaobject.connectslotsbyname(dialog)  def retranslateui(self, dialog):     dialog.setwindowtitle(qtgui.qapplication.translate("dialog", "dialog", none, qtgui.qapplication.unicodeutf8))     self.aboutlbl.settext(qtgui.qapplication.translate("dialog", "mailer version 0.0.1 .....", none, qtgui.qapplication.unicodeutf8)) 

i figure need create new function inside mainwindow.py when called opens dialog, have no idea put in function, i'm confused slots , connections, if me out example code great.

edit:

i figured out function part of code, still figuring out how connect menu connected button press executes method opens fine:

def openabout(self):     aboutdialog = qtgui.qdialog(self)     aboutui = about.about_dialog()     aboutui.setupui(aboutdialog)     aboutdialog.show() 

if mainwindow have menu action named actionabout, , slot called openabout, need connect triggered signal actionabout slot openabout.

self.actionabout.triggered.connect(self.openabout) 

the process similar have done pushbutton. change names used in example ones in application.