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Open pyqt program without console with pythonw

i have a strange problem. I created a GUI program which runs in "spyder" with WinPython-64bit-3.3.2.3 with no problems, now i want to run it without the console to pop up and i try to use pythonw.exe.
When i save my GUI as gui.pyw i can open it with PythonWin by right clicking and use edit with PythonWin but simply double-clicking will make my GUI pop up for less than a second and exit the program afterwards.
Does this have to do with my GUI programming?
the "structure" is this one:
import sys
from PyQt4 import QtGui, QtCore, Qt
from Main_Window_v2 import Ui_Dialog as Dlg
class MeinDialog(QtGui.QDialog, Dlg):
def __init__(self):
QtGui.QDialog.__init__(self)
self.setupUi(self)
self.connect(self.buttonOK,
QtCore.SIGNAL("clicked()"), self.onOK)
self.connect(self.buttonAbbrechen,
QtCore.SIGNAL("clicked()"), self.onClose)
self.connect(self.buttonsql,
QtCore.SIGNAL("clicked()"), self.onsql)
def onsql(self):
login=self.login_text_box.toPlainText()
from calc import get_variables #sql query
self.get_variables=get_variables(login)
#calls a class´ __init__ in another file in my direcotry
def onOK(self):
login=self.login_text_box.toPlainText()
self.get_variables.plot(login)
#calls another function in my class "calc"
def onClose(self):
print("bye!")
self.close()
app = QtGui.QApplication(sys.argv)
dialog = MeinDialog()
dialog.show()
I also tried to get an .exe using cx_freeze and after trying to making build as described here Cx_Freeze: I have the same problem: The Main-Window of the GUI
pops up and disappears again

Just add app.exec_() at the end of your code. Your code was running well in Spyder because Spyder uses PyQt and had the main loop of events already running.

You should add app.exex_() at the end of your code, it is used to dispatch all PyQt GUI threads message or other threads info message.

install module snapshot python

I am using wxPython to build the GUI for my application. I built the GUI using wxFormBuilder. But when bring the code into my python application, and launch it the window pops up then closes instantly. I am using the XRC for my GUI as well. I am given no error message in the console either while using PyDev with Eclipse.
Python code to launch GUI: http://pastebin.com/jBYWerd9
XRC code: http://pastebin.com/QVEcuX0i

I think you just need
def main():
app = VisualController(redirect=False)
app.MainLoop() #you need this
return #after calling Mainloop you will not get here until your main window is destroyed

The problem is two-fold. As Joran mentioned, you need to actually create an instance of your App class and call the MainLoop() method. The second piece is that you need to actually load the frame from the XRC file and Show it. Change your code to something like this:
import wx
from wx import xrc
class VisualController(wx.App):
def OnInit(self):
self.res = xrc.XmlResource('data/GUI.xrc')
frame = self.res.LoadFrame(None, "MyFrame1")
frame.Show()
return True
def main():
app = VisualController(redirect=False)
app.MainLoop()
if __name__ == '__main__':
main()
If you don't load the frame and show it, then the app doesn't do anything and just exits when it finishes running the OnInit() method. Here are a few links on using XRC:
http://www.blog.pythonlibrary.org/2010/05/11/wxpython-an-introduction-to-xrc/
http://wiki.wxpython.org/XRCTutorial
http://wiki.wxpython.org/UsingXmlResources

Different behaviour between python console and python script

I am experiencing different behaviour on the same code using the python console and a python script.
The code is as follows:
import gtk
import webkit
win = gtk.Window()
win.show()
web = webkit.WebView()
win.add(web)
web.show()
web.open("http://www.google.com")
When running the code in the python console, the output is a new frame that contains the google main page.
When running the code as a script, the result is a void frame. It closes very fast but even if I use a delay function, the webkit is not added to the frame.
How is it possible?
Furthermore, using PyDev IDE it flags: "unresolved import: gtk",
but if i run the project, the program starts without problem of compilation. is it normal?

Add
gtk.main()
to the end of your script. This starts the gtk event loop.
import gtk
import webkit
class App(object):
def __init__(self):
win = gtk.Window()
win.connect("destroy", self.destroy)
web = webkit.WebView()
web.open("http://www.google.com")
win.add(web)
web.show()
win.show()
def destroy(self, widget, data = None):
gtk.main_quit()
app = App()
gtk.main()

My guess is that the console keeps the python session open, while at the end of the script the program closes. When the script closes, it takes everything it created with it.
Something to test this theory: if you type "exit" in the console do you see the interface shut down in the same manner? If so, think of some code (e.g. a pause like a raw_input) that will allow the script to stay open.
Good luck!

wxPython with ScriptingBridge causes Seg Fault on exit

This is a very odd situation that I can not seem to figure out. I'm writing an application with wxPython on OSX Lion (wxpython version 2,9,3,1).
Whenever I import from ScriptingBridge and do something as simple as create a frame and then close it, it does not close cleanly and seg faults upon closing. Give this code a try:
from ScriptingBridge import *
import wx
class Test(wx.Frame):
def __init__(self, parent, title):
super(Test, self).__init__(parent, title=title, size=(300, 200))
self.Show()
app = wx.App()
Test(None, 'Hello')
app.MainLoop()
After running this code, just simply close it. It should seg fault. Now, simply comment out the ScriptingBridge import and run it again and close it. No Seg Fault.
What makes this even stranger is that if you just create a script that imports ScriptingBridge and yet does not import wxPython, once the script exits, it will not seg fault... It appears it's a combination between the two.
Has anyone seen this and have they found a work around for it? I'd like my app to exit cleanly if possible.

wx.app object must be created first

My code is pretty straight forward, but I keep getting the error below. I researched the error and it pretty much says IDLE and my own GUI are screwing each other up, but I don't really know how to avoid it. I mean, if I just click on the .py file for my GUI without having IDLE open, I get the same error.
Any ideas?
Python 2.7
Windows XP
import wx
class applicationName(wx.Frame):
def __init__(self, parent, id):
wx.Frame.__init__(self, parent, id, 'Title', size=(300,200))
panel = wx.Panel(self)
box = wx.TextEntryDialog(None, "How old are you?", "Title", "default text")
if box.ShowModal() == wx.ID_OK:
answer = box.GetValue()
if __name__ =='__main__':
app = wx.PySimpleApp()
frame = applicationName(parent=None, id=-1)
frame.Show()
app.MainLoop()
Error:
PyNoAppError: The wx.App object must be created first!

I guess you encountered this problem when you were debugging your program second time.
You can add the line at the end of the code.
del app
I hope it can help you.

Your __init__ function is not indented properly. It should be
def __init__(self, parent, id):
wx.Frame.__init__(self, parent, id, 'Title', size=(300,200))
panel = wx.Panel(self)
box = wx.TextEntryDialog(None, "How old are you?", "Title", "default text")
if box.ShowModal() == wx.ID_OK:
answer = box.GetValue()

Quoted from: http://wxpython-users.1045709.n5.nabble.com/PyNoAppError-The-wx-App-object-must-be-created-first-td2362821.html
The key is to use an editor/IDE that runs the Python code you are
editing in an external process, rather than running it in the same
process as the editor itself.

Try closing the terminal/console and re-running it (if the option is available).
worked for me when i got this massage in Spyder (3.3.2) when ran similar code to the above.

Running this inside Psychopy builder, adding the following to the beginning of the experiment helped:
import wx
tmpApp = wx.PySimpleApp()

I had the same problem, but the:
del app
close the window and stop the kernel, so it was not of great help
I found that this worked for me:
app=[]; app = wx.App(None)
whitout the app=[]-part, the program run once, but not the second time when it stops and gives the "wx.app object must be created first"-error
Hope this can be of use for others.
Per