在多线程中使用win32com_pywin32多线程

如果要在多个线程中使用win32com，需要使用CoMarshalInterThreadInterfaceInStream()和CoGetInterfaceAndReleaseStream()在线程之间传递实例，因为COMObject不能直接传递给线程：

import pythoncom, win32com.client, threading, time

def start():
    # Initialize
    pythoncom.CoInitialize()

    # Get instance
    xl = win32com.client.Dispatch('Excel.Application')

    # Create id
    xl_id = pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch, xl)

    # Pass the id to the new thread
    thread = threading.Thread(target=run_in_thread, kwargs={'xl_id': xl_id})
    thread.start()

    # Wait for child to finish
    thread.join()

def run_in_thread(xl_id):
    # Initialize
    pythoncom.CoInitialize()

    # Get instance from the id
    xl = win32com.client.Dispatch(
            pythoncom.CoGetInterfaceAndReleaseStream(xl_id, pythoncom.IID_IDispatch)
    )
    time.sleep(5)


if __name__ == '__main__':
    start()
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有关详细信息，请参见：https://mail.python.org/pipermail/python-win32/2008-June/007788.html