New submission from tyoc <z...@alum.com>:
Hi there, my problem is the following I dont know if this is a python
error, spected behaviour or what, so here I go.
I'm using pyatspi in a console application for retrieve focus events
(you need to enable accessibility if want to check... that is at-spi-
registryd in 'top'):
Example 1: works correctly (focus events printed to stdout).
NOTE: See that the import is inside of 'run' and all the calls to the
module are inside this thread.
FREEZE: No, correct behaviour.
[code start]--------------------------------------------
def cb(eve):
print eve
import threading
class THRE4D(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def run(self):
import pyatspi
print 'spot 0'
pyatspi.Registry.registerEventListener(cb, 'focus')
import gobject
print 'spot 1'
gobject.timeout_add(5000, pyatspi.Registry.stop)
print 'spot 2'
pyatspi.Registry.start()
print 'spot 3'
t = THRE4D()
t.start()
t.join(15000)
print 'joined'
[code end]--------------------------------------------
Example 2: it prints the first event and freeze quit because the
timeout_add.
NOTE:See that I have moved the import and the register to __init__ the
loop is in the new thread.
FREEZE: Yes. Print first event, dont know where it freeze (function),
but has passed 'registerEventListener' and it has entered
'Registry.start()'.
[code start]--------------------------------------------
def cb(eve):
print eve
import threading
class THRE4D(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
import pyatspi
pyatspi.Registry.registerEventListener(cb, 'focus')
def run(self):
import pyatspi
print 'spot 0'
import gobject
print 'spot 1'
gobject.timeout_add(5000, pyatspi.Registry.stop)
print 'spot 2'
pyatspi.Registry.start()
print 'spot 3'
t = THRE4D()
t.start()
t.join(15000)
print 'joined'
[code end]--------------------------------------------
Example 3: It does not print any event at all and it freezes. It only
prints 'spot 0'. The freeze is hard even that timeout_add doest end it
in the time.
NOTE: See that I have only imported pyatspi in '__init__' all the calls
are inside the thread.
FREEZE: Yes. No print of events, freeze inside inside 'accessible.py of
pyatspi' in '_inner' where 'try: return func(self, *args, **kwargs)'.
[code start]--------------------------------------------
def cb(eve):
print eve
import threading
class THRE4D(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
import pyatspi
def run(self):
import pyatspi
print 'spot 0'
pyatspi.Registry.registerEventListener(cb, 'focus')
import gobject
print 'spot 1'
gobject.timeout_add(5000, pyatspi.Registry.stop)
print 'spot 2'
pyatspi.Registry.start()
print 'spot 3'
t = THRE4D()
t.start()
t.join(15000)
print 'joined'
[code end]--------------------------------------------
actual conclusions
* I dont know why importing it 2 times (pyatspi) in different context
of threads launch this problem.
* for a 'quick' solution: The import and the calls should be in the
same thread "specially" 'registerEventListener'.
----------
components: Library (Lib), None
messages: 86975
nosy: tyoc
severity: normal
status: open
title: I need to import the module in the same thread?
type: behavior
versions: Python 2.5
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue5908>
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