[pygtk] gobject.connect

[Timo]

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
>
>
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