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How to make friends python with win32 api
- 1. How to makefriends of Python and Win32 API Connecting the Python to a Win32 API provided by a stock broker
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- 5. Issues COM to purePython object conversion Flow (events, async methods) handling Multithreading support Extensibility
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- 8. What I’ve found pywin32package on sourceforge.net by Mark Hammond python interpreter builds: ActiveState, Anaconda, Canopy with pywin32 Python Programming On Win32 by Mark Hammond and Andy Robinson no actual documentation on activestate.com
- 9. Pywin32 workflow Make Handle Eventsclass Make client object with DispatchWithEve nts method Use API methods on python object
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- 11. Event class class ClientEvents: defOnAddBar(self, row, nrows, symbol, interval, datetime, open, high, low, close, volume, open_int): pass # some logic …
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- 13. Cool tool Make folderpython_folderLibsite- packageswin32comgen_py Run 'win32comclientmakepy.py' (eg, run it from the command window, or double-click on it) and a list will be presented. Select the Type Library. It will generate python wrapper classes from COM Library with all available methods.
- 14. Convert DateTime objects defpytime_2_datetime(pythime): return dt(year=pythime.year, month=pythime.month, day=pythime.day, hour=pythime.hour, minute=pythime.minute, second=pythime.second) def datetime_2_pytime(datetime): return pywintypes.Time(time .mktime(datetime.timetuple()))
- 15. Solution v. 0.1 COMto pure Python object conversion Flow (events, async methods) handling
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- 18. Workflow Add event queue Create custom Manager Makeproxy to COM Object Get pure python Events queue Use proxy and queue from other threads
- 19. Modify Event class,part 1 class ClientEvents: def __init__(self): self.event_queue = Manager().Queue() def get_event_queue(self): return self.event_queue …
- 20. Modify Event class,part 2 class ClientEvents: … def OnAddBar(self, row, nrows, symbol, interval, datetime, open, high, low, close, volume, open_int): self.event_queue.put_nowait(('AddBar', row, nrows, symbol, interval, pytime_2_datetime(datetime), open, high, low, close, volume, open_int))
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- 22. Add client method defget_com_server(): CoInitializeEx(COINIT_MULTITHREADED) clnt = client.DispatchWithEvents('COM.Server.1', ClientEvents) CoUninitialize() return clnt
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- 24. Fix DateTime bug,part 1 class ClientEvents: def GetBarsSer(self, symbol, interval, since, count): self.GetBars(symbol, interval, datetime_2_pytime(since), count)
- 25. Fix DateTime bug,part 2 ComManager.register('get_com_server', callable=get_com_server, exposed=('CancelBidAsks', 'CancelOrder', 'GetBars', 'GetMoneyAccount', …, 'get_event_queue', 'GetBarsSer'))
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- 27. Use as server,server code if __name__ == '__main__': freeze_support() m = ComManager(address=('127.0.0.1', port, authkey='authkey').get_server() .serve_forever()
- 28. Use as server,client code … manager = ComManager(address='address', port, authkey='authkey') manager.connect() com_server =manager.get_com_server() com_event_queue = com_server.get_event_queue()
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- 30. In code use frompackage_mame import ComManager if __name__ == '__main__': freeze_support() manager = ComManager() manager.start() com_server = manager.get_com_server() com_event_queue = com_server.get_event_queue()
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