From memory, trying to use a XULRunner build in this way is tricky, due to
the directory layout used by that tech.  It might be necessary to dig into
_xpcom.cpp to see exactly what directory we are calling NS_InitXPCOM2()
with, and if that directory is appropriate for a xulrunner app.

Mark
-----Original Message-----
From: pyxpcom-bounces@[...].com
[mailto:pyxpcom-bounces@[...].com]On Behalf Of Ryan Sturmer
Sent: Friday, 6 July 2007 6:17 AM
To: pyxpcom@[...].com
Subject: [pyxpcom] 'import components' issue with xpcom and python 2.5.1


I'm working on windows, and I've got an import problem,

when I call:

from xpcom import components

I get an error:

C:\Documents and Settings\rsturmer\My Documents\src\<ipython console>  in
<module> ()

C:\mozilla-src-vc71\mozilla\obj-i686-pc-mingw32\dist\bin\python\xpcom\compon
ents.py in <module> ()
    229
    230 # import xpcom.shutdown late as it depends on us!
-->  231 import shutdown
    232 shutdown.register(_on_shutdown)
    233

C:\mozilla-src-vc71\mozilla\obj-i686-pc-mingw32\dist\bin\python\xpcom\shutdo
wn.py in <module> ()
     49 _handlers = []
     50
--->  51 class _ShutdownObserver:
     52     _com_interfaces_ = interfaces.nsIObserver
     53     def observe(self, service, topic, extra):

C:\mozilla-src-vc71\mozilla\obj-i686-pc-mingw32\dist\bin\python\xpcom\shutdo
wn.py in _ShutdownObserver()
     50
     51 class _ShutdownObserver:
--->  52     _com_interfaces_ = interfaces.nsIObserver
     53     def observe(self, service, topic, extra):
     54         logger = logging.getLogger('xpcom')

C:\mozilla-src-vc71\mozilla\obj-i686-pc-mingw32\dist\bin\python\xpcom\compon
ents.py in __getattr__(self, attr)
    101         if self._dict_data is not None and
self._dict_data.has_key(attr):
    102             return self._dict_data[attr]
-->  103         return self._get_one(attr)
    104     def __getitem__(self, item):
    105         if self._dict_data is not None and
self._dict_data.has_key(item):

C:\mozilla-src-vc71\mozilla\obj-i686-pc-mingw32\dist\bin\python\xpcom\compon
ents.py in _get_one(self, name)
    151             # Present a better exception message, and give a more
useful error code.
    152             import nsError
-->  153             raise xpcom.COMException(nsError.NS_ERROR_NO_INTERFACE,
"The interface '%s' does not exist" % (name,))
    154         return _Interface(item.GetName(), item.GetIID())
    155

<class 'xpcom.Exception'> : -2147467262 (-2147467262)

It apparently can't find the interface.... I went into the /dist/bin/python
directory, (I'm using the latest trunk, as of a week or so ago) and mucked
about with the source a bit (just put some debug print statements in there)
The interface it can't find is the nsIObserver, which makes me think maybe
python simply can't find the component registry?  I've made sure that
/dist/bin and /dist/bin/python are on my path... it doesn't have any
(apparent) issue finding xpcom.dll and its kin, but I get this import error
everytime I try to do anything.

The odd thing is, I've successfully built an example program with xulrunner,
where I have a button that when pressed, calls out to an xpcom component
written in python, that returns a random number that's displayed with a
javascript alert....that component calls the same import, but when executed,
apparently doesn't give me any trouble, because it performs its intended
function.

It's obnoxious not to be able to work these things interactively from within
the python shell.  Any clues?

--
"The preceding program contained violent scenes of a graphic nature.  Time
travelers with nervous dispositions may wish to listen to something else for
the past half hour."
-John Marsh
"The Hitchhikers Guide to the Galaxy"

Ryan Sturmer
ryansturmer@[...].com
http://www.gogglemarks.net/

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