UnboundLocalError problems
Terry Reedy
tjreedy at udel.edu
Sun Jun 29 18:53:26 EDT 2008
Mr SZ wrote:
>
> Hi,
>
> I am writing a small script that changes my pidgin status to away when I
> lock my screen.I'm using the DBUS API for pidgin and
> gnome-screensaver.Here's the code:
>
> #!/usr/bin/env python
>
> import dbus, gobject
> from dbus.mainloop.glib import DBusGMainLoop
> dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
> bus = dbus.SessionBus()
>
> obj = bus.get_object("im.pidgin.purple.PurpleService",
> "/im/pidgin/purple/PurpleObject")
> purple = dbus.Interface(obj, "im.pidgin.purple.PurpleInterface")
>
>
> STATUS_AVAILABLE = 2
> STATUS_AWAY = 5
>
> ORIG_TYPE = 0
> ORIG_MSG = ""
>
>
> def my_func2(IsEnabled):
you need
global ORIG_TYPE,ORIG_MSG
> if IsEnabled:
> ORIG_TYPE,ORIG_MSG = get_current()
because this otherwise marks them as local.
[snip]
> When I run it,it errors out at :
>
> set_status(ORIG_TYPE,ORIG_MSG)
>
> giving the error "UnboundLocalError: local variable 'ORIG_TYPE'
> referenced before assignment" .This happens
In the future, copy and paste the full traceback, which often has
additional useful information -- like the line # of the call -- which is
not so obvious to someone who has not read the code.
>
> Aren't ORIG_TYPE and ORIG_MSG global variables? Where am I going
> wrong?Everything works fine if I set the arguments manually to the
> set_status function.
*Any* assignment to a name, including with def, class, import, and
augmented assignment, even if the statement is unreachable and cannot be
executed, marks the name as local -- unless you specify it as global (or
nonlocal in 3.0).
tjr
More information about the Python-list
mailing list