wxpython - passing arg to wx.app OnInit

[Stuart McGraw]

I have a wxPython app, conventionally structured
with a Application class derived from wx.App.
My problem is that the app accepts a command
line argument that must be acted upon within the
OnInit() method of the Application class. How do
I pass it cleanly from main() into app.OnInit()? In
the simplified example below, dbfn is the piece of
info that is in main() that OnInit() needs to use.
Is a global variable is the only way? :-(

class Application (wx.App):
def OnInit (self):
oper = Operations (dbfn);
frame = Frame (None, -1, "Title", oper)
self.SetTopWind ow (frame)
return True

def main ():
dbfn = sys.args[1]
app = Application (redirect=0)
app.MainLoop ()

Apologies if the answer is (or should be) obvious... this
is my first time using wxWindows and I am still rather new
to Python.

[Peter Hansen]

Re: wxpython - passing arg to wx.app OnInit

Stuart McGraw wrote:[color=blue]
> I have a wxPython app, conventionally structured
> with a Application class derived from wx.App.
> My problem is that the app accepts a command
> line argument that must be acted upon within the
> OnInit() method of the Application class. How do
> I pass it cleanly from main() into app.OnInit()? In
> the simplified example below, dbfn is the piece of
> info that is in main() that OnInit() needs to use.
> Is a global variable is the only way? :-([/color]

There are various ways, but the simplest is to accept that sys.argv is
*already* a "global" and just to access it directly from the
Application's OnInit() method.

This wiki page demonstrates:

http://wiki.wxpython.org/index.cgi/UsingCommandLineArguments

-Peter

[Stuart McGraw]

Re: wxpython - passing arg to wx.app OnInit


"Peter Hansen" <peter@engcorp. com> wrote in message news:7pGdnfmqQo JJG8beRVn-iA@powergate.ca ...[color=blue]
> Stuart McGraw wrote:[color=green]
> > I have a wxPython app, conventionally structured
> > with a Application class derived from wx.App.
> > My problem is that the app accepts a command
> > line argument that must be acted upon within the
> > OnInit() method of the Application class. How do
> > I pass it cleanly from main() into app.OnInit()? In
> > the simplified example below, dbfn is the piece of
> > info that is in main() that OnInit() needs to use.
> > Is a global variable is the only way? :-([/color]
>
> There are various ways, but the simplest is to accept that sys.argv is
> *already* a "global" and just to access it directly from the
> Application's OnInit() method.
>
> This wiki page demonstrates:
> http://wiki.wxpython.org/index.cgi/U...dLineArguments
>
> -Peter[/color]

I simplied the my code for posting. In my real program, the
thing being passed is not a command line argument per se,
but the result of signifigant processing dependent on the
command line argument. I do not want to repeat that
processing in the wx.App method.
Would you elaborate on the other ways?

[Peter Hansen]

Re: wxpython - passing arg to wx.app OnInit

Stuart McGraw wrote:[color=blue]
> I simplied the my code for posting. In my real program, the
> thing being passed is not a command line argument per se,
> but the result of signifigant processing dependent on the
> command line argument. I do not want to repeat that
> processing in the wx.App method.
> Would you elaborate on the other ways?[/color]

In that case, override __init__ something like this:

class Application(wx. App):
def __init__(self, *pargs, clargs=None, **kwargs):
self.clargs = clargs or [] # store reference to args

# call parent class initializer
wx.App.__init__ (self, *pargs, **kwargs)

def OnInit(self):
# use self.clargs here


app = Application(red irect=0, clargs=[dbfn])

or whatever... I just guessed at what you meant to do with dbfn though,
but I think the basic idea is clear enough.

-Peter