You could try using DispatchEx to make sure you always
get a new instance of Excel.
Roger
"Ransom" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]
> Hey folks...
>
> Newbie here. I'm working with win32com launching, closing and
> re-launching Excel grabbing output and doing stuff.
>
> Well, on some occasions, I get the following error:
>
>
> Traceback (most recent call last):
> File "checkrates.py", line 95, in ?
> newdata = getNewData(testcases1)
> File "checkrates.py", line 62, in getNewData
> excel.Workbooks.Open(docdir + 'TOSrat2006_09.xls')
> File "C:\Python24\lib\site-packages\win32com\client\dynamic.py", line
> 496, in __getattr__
> raise AttributeError, "%s.%s" % (self._username_, attr)
> AttributeError: Excel.Application.Workbooks
>
> Sometimes the code runs fine. Sometimes I get this error. The code in
> question is:
>
> import string
> from win32com.client import Dispatch
> docdir = 'E:\\scripts\\Python\\RSAutomation\\'
>
>
> def getOldData(testcases):
> #open excel
> excel = Dispatch("Excel.Application")
> excel.Workbooks.Open(docdir + 'TOSrat2006_07.xls')
>
> oldoutputlist = []
> for rsinput in testcases.xreadlines():
>
> inputlist = string.split(rsinput, ',')
>
> # iterate through and update spreadheet input
> cellx = range(3,51)
> values = range(0,48)
> for i,r in zip(cellx, values):
>
> excel.ActiveSheet.Cells(i,2).Value = inputlist[r]
>
> #read spreadsheet output and cat to outputlist
> premium = excel.ActiveSheet.Cells(32,6).Value
> oldoutputlist.append(premium)
> # close up excel
> excel.ActiveWorkbook.Close(SaveChanges=0)
> excel.Quit()
> del excel
> return oldoutputlist
>
> def getNewData(testcases):
> # open excel
> excel = Dispatch("Excel.Application")
> excel.Workbooks.Open(docdir + 'TOSrat2006_09.xls')
> newoutputlist = []
> for rsinput in testcases.xreadlines():
>
> inputlist = string.split(rsinput, ',')
>
> # iterate through and update spreadsheet input
> cellx = range(3,51)
> values = range(0,48)
> for i,r in zip(cellx, values):
>
> excel.ActiveSheet.Cells(i,2).Value = inputlist[r]
>
> # read ratesheet output and cat to outputlist
> premium = excel.ActiveSheet.Cells(32,6).Value
> newoutputlist.append(premium)
> excel.ActiveWorkbook.Close(SaveChanges=0)
> excel.Quit()
> del excel
> return newoutputlist
>
> if __name__ == "__main__":
> testcases = open('arse_testcases.csv','r')
> testcases1 = open('arse_testcases.csv','r')
> olddata = getOldData(testcases)
> newdata = getNewData(testcases1)
>
> print olddata
> print newdata
>
>
> It seems like Python or COM is having a hard time freeing up (or
> closing down) excel prior to the "getNewData" function running and it
> is stepping on itself. I thought the stuff I'm doing at the end of
> getOldData should successfully shut down excel.
>
> Any advice, criticism, flames are appreciated.
>
> Cheers!
>
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