Finally I solved the problem using the attached function to release the
com object
def ReleaseDocumentReference(self,doc):
if not is_tracked( doc._oleobj_):
x=doc._oleobj_
if is_tracked(x):
print "Now x is traked"
addr = int(repr(x).split()[-1][2:-1], 16)
from ctypes import *
from comtypes.automation import IDispatch
from _ctypes import CopyComPointer
p = POINTER(IDispatch)()
cast(byref(p), POINTER(c_void_p))[0] = addr
if is_tracked(p):
print "Now is traked"
p.Release()
the problem was due to the doc._oleobj_ that contains the PyIDispatch
object that was not tracked by the garbage collector ..
regards,
Matteo
Il 12/09/2012 03:00, Andrew MacIntyre ha scritto:
[sorry for top post]
CPython uses reference counting; when the reference count drops to 0,
the object is deleted and its memory returned to the heap.
CPython's garbage collector is there to attempt to resolve situations
where the reference count is not being allowed to drop to 0 (such as
via circular references). CPython's garbage collector isn't the same
as garbage collection in other languages (such as Java).
Setting a variable to None in CPython will definitely force an object
to be deleted if its reference count drops to zero.
The garbage collector has an additional function (run as a
side-effect) which may give the impression of delayed cleanup -- when
it is run, it checks the state of Python's private memory allocator,
and if there are unused memory chunks in the private heap it will
return them to the OS.
-------------------------> "These thoughts are mine alone!" <---------
Andrew MacIntyre Operations Branch
tel: +61 2 6219 5356 Communications Infrastructure Division
fax: +61 2 6253 3277 Australian Communications & Media Authority
email: andrew.macint...@acma.gov.au
<mailto:andrew.macint...@acma.gov.au>http://www.acma.gov.au/
*From:*python-win32
[mailto:python-win32-bounces+andrew.macintyre=acma.gov...@python.org]
*On Behalf Of *Randy Syring
*Sent:* Wednesday, 12 September 2012 12:09 AM
*To:* python-win32@python.org
*Subject:* Re: [python-win32] how can I do marshall.ReleaseComObject
in python ?? [SEC=UNCLASSIFIED]
I'm not sure how this applies to COM and the python interface to it,
but just setting a value to None doesn't usually force the object to
go away in Python. That won't happen until it is garbage collected,
which you can force if needed:
http://docs.python.org/library/gc.html
---------------------------------------------
Randy Syring
Development & Executive Director
Level 12 Technologies <https://www.lev12.com/>
Direct: 502-276-0459
Office: 502-212-9913
Principled People, Technology that Works
On 09/11/2012 09:35 AM, Matteo Boscolo wrote:
I try with both method but with no result:
the code is this :
def GerPropValue2(self,name):
try:
oiDoc,ent=self._getCurrentEnt
if ent!=None:
props=ent.Properties(True)
return "aaa" # Go out here for testing pourpuse
for i in range(0, len(props)): # check the len it
could give some error
logging.debug('_getProp : property found
%s',str(props[i].Parent.Name))
if props[i].Parent.Name==name:
return props[i].Value
return None
finally:
del ent
del props
del oiDoc
props=None
tdProp=None
oiDoc=None
ent=None
there is any way to debug how is the object deleted ?
regards,
Matteo
Il 11/09/2012 02:47, Andrew MacIntyre ha scritto:
[sorry for top-post]
You probably need to release the Python object that is
wrapping the COM object.
Given a variable x holding a COM object reference, either:
del x
or
x = None
should force release of any COM object reference.
Which to use depends on taste and context -- the latter
approach for example being perhaps more usual when dealing
with object attributes.
-------------------------> "These thoughts are mine alone!"
<---------
Andrew MacIntyre Operations Branch
tel: +61 2 6219 5356 Communications Infrastructure Division
fax: +61 2 6253 3277 Australian Communications & Media
Authority
email: andrew.macint...@acma.gov.au
<mailto:andrew.macint...@acma.gov.au> http://www.acma.gov.au/
*From:*python-win32
[mailto:python-win32-bounces+andrew.macintyre=acma.gov...@python.org]
*On Behalf Of *Matteo Boscolo
*Sent:* Tuesday, 11 September 2012 4:00 AM
*To:* python-win32@python.org <mailto:python-win32@python.org>
*Subject:* [python-win32] how can I do
marshall.ReleaseComObject in python ??
Hi All,
I'm Working on a cad program using the it's com interface
I have a python com object in witch I call a method as follows ..
props=ent.Properties(True)
#Ent is a IDocument
this method is working well, and return a tuple of
ITDProperty that are the property of the document.
The problem is when I close the document from the Cad
application, the Cad application is unable to close the
document because there is some reference still active.
I tried several way using the gc.collect(), to set to null
each document pointer but with no result.
I tried to do the some kind of operation with c# and using the
Marshal.ReleaseComObject(doc);, where doc is the IDocument,
and document is released and I'm free to close it from the
interface.
*now the question is how can I do the some staff as
ReleaseComObject dose in python ?*
its the Release method of the |IUnknown|interface the right
way to do that ?
any hint is really appreciated, thanks
Regards,
Matteo
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