I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
11  3137 
Teja wrote:
I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
If COM is not thread safe, then use processes
hg wrote:
Teja wrote:
I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
If COM is not thread safe, then use processes
Thanks a LOT for your reply...... Can u please tell me how to
processes......
"Teja" <te*********@gm ail.comwrote:
>I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
An actual traceback would help.
At a guess, when using COM in a thread
you need to call pythoncom.CoIni tialize and
CoUninitialize yourself.
Roger
Teja wrote:
hg wrote:
>Teja wrote:
>>I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
If COM is not thread safe, then use processes
Thanks a LOT for your reply...... Can u please tell me how to
processes......
I gather pywin32 gives you the trick to do it (CreateProcess ?) as I
gather "fork"ing is not available under Windows.
Roger Upole wrote:
"Teja" <te*********@gm ail.comwrote:
I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
An actual traceback would help.
At a guess, when using COM in a thread
you need to call pythoncom.CoIni tialize and
CoUninitialize yourself.
Roger
Actually Roger, this is the scenario....
I create a COM object at the beginnning of the main thread. In the sub
thread, I need to access the same instance of the COM object. If it
were a normal object ie. not a COM obj, i was able to do it. But if it
were a COM object, its giving an attribute error? Should I pass a COM
object to the thread. If so How? Please let me know ASAP... Thnks
hg wrote:
Teja wrote:
hg wrote:
Teja wrote:
I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
If COM is not thread safe, then use processes
Thanks a LOT for your reply...... Can u please tell me how to
processes......
I gather pywin32 gives you the trick to do it (CreateProcess ?) as I
gather "fork"ing is not available under Windows.
Hg, This is the scenario..
I create a COM object in main. I need to access that object in a thread
or subprocess or whatever. Can u pls tell me how to do it. Its a COM
object.
Thnks
"Teja" <te*********@gm ail.comwrote:
>
Roger Upole wrote:
>"Teja" <te*********@gm ail.comwrote:
>I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
An actual traceback would help.
At a guess, when using COM in a thread
you need to call pythoncom.CoIni tialize and
CoUninitiali ze yourself.
Roger
Actually Roger, this is the scenario....
I create a COM object at the beginnning of the main thread. In the sub
thread, I need to access the same instance of the COM object. If it
were a normal object ie. not a COM obj, i was able to do it. But if it
were a COM object, its giving an attribute error? Should I pass a COM
object to the thread. If so How? Please let me know ASAP... Thnks
To pass COM objects between threads, usually they'll need to be marshaled
using pythoncom.CoMar shalInterThread InterfaceInStre am, and unmarshaled
with pythoncom.CoGet InterfaceAndRel easeStream.
Roger
Roger Upole wrote:
"Teja" <te*********@gm ail.comwrote:
Roger Upole wrote:
"Teja" <te*********@gm ail.comwrote:
I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
An actual traceback would help.
At a guess, when using COM in a thread
you need to call pythoncom.CoIni tialize and
CoUninitialize yourself.
Roger
Actually Roger, this is the scenario....
I create a COM object at the beginnning of the main thread. In the sub
thread, I need to access the same instance of the COM object. If it
were a normal object ie. not a COM obj, i was able to do it. But if it
were a COM object, its giving an attribute error? Should I pass a COM
object to the thread. If so How? Please let me know ASAP... Thnks
To pass COM objects between threads, usually they'll need to be marshaled
using pythoncom.CoMar shalInterThread InterfaceInStre am, and unmarshaled
with pythoncom.CoGet InterfaceAndRel easeStream.
Roger
I really appreciate your quick reply....Can u please let me know how to
do marshalling and unmarshalling or any good refrences to do it.
Because i tried to do it. I got some errors ans so I left it...
Thnks again...
"Teja" <te*********@gm ail.comwrote:
>
Roger Upole wrote:
>"Teja" <te*********@gm ail.comwrote:
>
Roger Upole wrote:
"Teja" <te*********@gm ail.comwrote:
I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????
An actual traceback would help.
At a guess, when using COM in a thread
you need to call pythoncom.CoIni tialize and
CoUninitiali ze yourself.
Roger
Actually Roger, this is the scenario....
I create a COM object at the beginnning of the main thread. In the sub
thread, I need to access the same instance of the COM object. If it
were a normal object ie. not a COM obj, i was able to do it. But if it
were a COM object, its giving an attribute error? Should I pass a COM
object to the thread. If so How? Please let me know ASAP... Thnks
To pass COM objects between threads, usually they'll need to be marshaled
using pythoncom.CoMar shalInterThread InterfaceInStre am, and unmarshaled
with pythoncom.CoGet InterfaceAndRel easeStream.
Roger
I really appreciate your quick reply....Can u please let me know how to
do marshalling and unmarshalling or any good refrences to do it.
Because i tried to do it. I got some errors ans so I left it...
Thnks again...
Here's a simple example using Internet Explorer.
import win32com.client , pythoncom, thread
ie=win32com.cli ent.Dispatch('i nternetexplorer .application')
ie.Visible=1
def nav(istream, dest):
pythoncom.CoIni tialize()
d=pythoncom.CoG etInterfaceAndR eleaseStream(is tream, pythoncom.IID_I Dispatch)
my_ie=win32com. client.Dispatch (d)
my_ie.Navigate( dest)
pythoncom.CoUni nitialize()
s=pythoncom.CoM arshalInterThre adInterfaceInSt ream(pythoncom. IID_IDispatch,i e)
thread.start_ne w_thread(nav, (s, 'www.google.com '))
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