Hello, You may already seen that either below two ways the code will work:
1. currStock = ab.Stocks.__getitem__( nStockIdx) (# instead of using Item) 2. loop without using the index variable for stock in ab.Stocks: print stock.Ticker The new question brought why the Item method has the power to render ab.Stocks sometimes null, or seems so: (<== as revealed by the snake lanaguage's complaint about Nonetype object is not callable) ? Regards, SW ________________________________ From: pwa72x <[email protected]> To: [email protected] Sent: Friday, May 29, 2009 3:55:16 AM Subject: [amibroker] Re: python, COM and AB > You've done a search of the forum archives for Python, right? Yes, unfortunately there doesn't seem to be anything about this. I've got a couple of other ideas to try: * Early binding of Python. * Passing a variant from Python to other non-Amibroker COM object. * Passing a variant to one of the variable parameter methods in Amibroker. Thanks, Peter. --- In amibro...@yahoogrou ps.com, dingo <waledi...@. ..> wrote: > > You've done a search of the forum archives for Python, right? > > d > > On Wed, May 27, 2009 at 2:26 AM, pwa72x <peter.aberline@ ...> wrote: > > > Hi, > > > > I can see now that the parameter types are different. The Markets item > > method takes an integer and the Stocks method takes a variant. > > > > According to the win32com docs, > > http://oreilly. com/catalog/ pythonwin32/ chapter/ch12. html#24074, > > PythonWin > > will map python types to a variant automagically, so it should just work. > > Perhaps this is an issue with late binding, and that I should force it to > > use early binding? > > > > Any ideas anyone? > > > > Thanks > > Peter. > > > > --- In amibro...@yahoogrou ps.com, "pwa72x" <peter.aberline@ > wrote: > > > > > > Hi, > > > > > > I'm using Python and the PyWin32 extensions to allow COM iterop with AB. > > > > > > I'm trying to call the Item method on a Stocks object, but I'm getting > > the error below. > > > Confusingly, doing the same thing on the Markets object works fine. Can > > anyone suggest what is happening here? > > > > > > Thanks > > > Peter > > > > > > ############ ######### ######### ######### ######### > > > import win32com.client > > > > > > def doWork(): > > > ab = win32com.client. Dispatch( "Broker.Applicat ion") > > > > > > bLoadLSE = > > ab.LoadDatabase( "E:\data\ AmiBroker\ Amibroker_ databases\ LSE"); > > > if bLoadLSE == False: > > > print "Could not load the LSE database" > > > return > > > > > > nNumMarkets = ab.Markets.Count > > > print "\nNumMarkets is %d " % nNumMarkets > > > for nMarketIdx in range(nNumMarkets) : > > > currMarket = ab.Markets.Item( nMarketIdx) > > > print currMarket.Name > > > > > > nNumStocks = ab.Stocks.Count; > > > print "\nNumStocks is %d " % nNumStocks > > > for nStockIdx in range(nNumStocks) : > > > print "StockIdx is %d" % nStockIdx > > > currStock = ab.Stocks.Item( nStockIdx) # <---- fails here > > > print currStock.Ticker > > > > > > if __name__ == "__main__": > > > doWork() > > > > > > ############ ######### ######### ######### ######### > > > > > > Output: > > > E:\data\python> python posting.py > > > > > > NumStocks is 714 > > > StockIdx is 0 > > > Traceback (most recent call last): > > > File "posting.py" , line 25, in <module> > > > doWork() > > > File "posting.py" , line 21, in doWork > > > currStock = ab.Stocks.Item( nStockIdx) # <---- fails here > > > TypeError: 'NoneType' object is not callable > > > > > > > > > > > > > ------------ --------- --------- ------ > > > > **** IMPORTANT PLEASE READ **** > > This group is for the discussion between users only. > > This is *NOT* technical support channel. > > > > TO GET TECHNICAL SUPPORT send an e-mail directly to > > SUPPORT {at} amibroker.com > > > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at > > http://www..amibroker.com/feedback/ > > (submissions sent via other channels won't be considered) > > > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > > http://www.amibroker.com/devlog/ > > > > Yahoo! Groups Links > > > > > > > > >
