gobject.connect

[BarthPi]

Hi everyone,

I am new to this mailing list. I am working on a program to perform data analysis in python. This program is based on a library already developped, that uses pygtk to create data-handling objects. 

This data object inherits from gobject.GObject, and defines a few signals "new-data-point".

I would like to connect this signal to a few functions, specifying the arguments of these functions. I have read the PyGTK webpage (http://www.pygtk.org/docs/pygobject/class-gobject.html#method-gobject--connect), which specifies that i just have to concatenate in the "connect" call the arguments: "object.connect("signal_name",handler,arg1,arg2,arg3)

I therefore have written: 

data.connect("new-data-point", handler,'text')

and defined the handler function as suggested: def handler(object,arg1,arg2,arg3)

def handler(data,argument):

    print data

    print argument

However, when i do execute the "connect" function, i get the error message: 

"connect takes exactly 3 arguments (4 given). 

Could you tell me how i could then specify arguments for the functions to be called when the signal is given ? 

Bests,

Pierre

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[Timo List]

Op 23-04-12 12:44, Pierre Barthelemy schreef:

> Hi everyone,
>
> I am new to this mailing list. I am working on a program to perform
> data analysis in python. This program is based on a library already
> developped, that uses pygtk to create data-handling objects.
> This data object inherits from gobject.GObject, and defines a few
> signals "new-data-point".
>
> I would like to connect this signal to a few functions, specifying the
> arguments of these functions. I have read the PyGTK webpage
> (http://www.pygtk.org/docs/pygobject/class-gobject.html#method-gobject--connect),
> which specifies that i just have to concatenate in the "connect" call
> the arguments: "object.connect("signal_name",handler,arg1,arg2,arg3)
>
> I therefore have written:
>
> data.connect("new-data-point", handler,'text')
>
>
> and defined the handler function as suggested: def
> handler(object,arg1,arg2,arg3)
>
> def handler(data,argument):
>     print data
>     print argument
>
> However, when i do execute the "connect" function, i get the error
> message:
> "connect takes exactly 3 arguments (4 given).

It could be a couple of things, but the easiest way to find out is (and
this applies to all Python functions in the future when you encounter
this exception):
def handler(*args):
     print args

And see for yourself which arguments are passed.

If the error is in the data.connect() call, try with only one argument
and see if it passes, then two, then ...
Without code, it's impossible for us to say what it expects.

Cheers,
Timo

>
> Could you tell me how i could then specify arguments for the functions
> to be called when the signal is given ?
>
> Bests,
>
> Pierre
>
>
> _______________________________________________
> pygtk mailing list   pygtk@...
> http://www.daa.com.au/mailman/listinfo/pygtk
> Read the PyGTK FAQ: http://faq.pygtk.org/

_______________________________________________
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Read the PyGTK FAQ: http://faq.pygtk.org/