Hi guys,

For the last month or so I've been trying to develop a piece of a program 
which enters numbers into an excel spreadsheet. I've managed to get it to go 
from the interactive interpreter, but as soon as I put those same commands 
into a file, I get errors:

--<snip> --
Traceback (most recent call last):
  File "wedderburn.py", line 467, in idle
    self.xlapp.adddata((command,args))
  File "C:\Documents and 
Settings\Administrator\Desktop\wedderburn\excelspread.py", line 58, in 
adddata
    self.app.ActiveSheet.Cells(self.x,self.y).Value = d #insert the data into 
the sheet.
  File "C:\PYTHON23\lib\site-packages\win32com\client\dynamic.py", line 154, 
in __call__
    return 
self._get_good_object_(self._oleobj_.Invoke(*allArgs),self._olerepr_.defaultDispatchName,Non
e)
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, None, None, 
None, 0, -2146827284), None)
--</snip> --

This is the file "excelspread.py":

-<snip> -
#!/usr/bin/python

import os,sys

if os.name != 'nt':
	print "we're not in a win32 environment, so excel logging will not be 
available."
	sys.exit(1)

try:
	import win32com.client
except:
		print "you don't seem to have the python windows/COM extensions 
installed!\n\nget them from: http://www.python.org/windows/"
		sys.exit(1)


'''This file contains functions and classes to append information to an excel 
spreadsheet.'''

class app:
	def __init__(self,title="Weight SpreadSheet:"):

		#we have to start excel with a spreadsheet, and put up the title.

		self.x = self.y = self.width = 0
		
		self.app = win32com.client.Dispatch("Excel.Application")
		self.app.Visible = 1
		self.app.Workbooks.Add()

		#set the title:
		self.app.ActiveSheet.Cells(1,1).Value = title
		self.y += 1

		self.initial = 1
		self.cols = {}


		#that's it as far as initialisation goes...

	def adddata(self,values):
		# values will be a two part list. he first part will always contain the
		# text string 'DATA'. THe second part will be a list of lists. these
		# inner lists will contain two values. the first will be a header code,
		# the second item will be the actual data. this from the dummy driver:
		#
		# return 
['DATA',[['CODENO','0125846'],['NETWEIGHT',netw],['GROSSWEIGHT',grossw],['TARE',tare]]]
		#
		code,data = values	#unpack the values.

		self.x = 0
		self.y += 1
		
		if self.initial:
			#this is the first time we have added data to the spreadsheet. we need to 
set up
			#the column headers.
			for chunk in data:
				c,d = chunk						#unpack the code chunk
				self.cols[c] = self.x			#add entry to cols dictionary.
				self.app.ActiveSheet.Cells(self.x,self.y).Value = d	#insert the data into 
the sheet.
				self.x += 1 					#incriment the x column
			self.initial = 0
		else:
			for chunk in data:
				c,d = chunk #unpack the code chunk.
				self.x = self.cols.get(c,10)    #put error messages in col 10
				self.app.ActiveSheet.Cells(self.x,self.y).Value = d
			
					
if __name__ == '__main__':
	xl = app()
	# this is the format that data is sent to the class:
	
xl.adddata(['DATA'[['HEADER1','VALUE1'],['HEADER2','VALUE2'],['HEADER3','VALUE3'],['HEADER4'
,'VALUE','4']]])
	
xl.adddata(['DATA'[['HEADER1','VALUE1'],['HEADER2','VALUE2'],['HEADER3','VALUE3'],['HEADER4'
,'VALUE','4']]])
	
xl.adddata(['DATA'[['HEADER1','VALUE1'],['HEADER2','VALUE2'],['HEADER3','VALUE3'],['HEADER4'
,'VALUE','4']]])
	
xl.adddata(['DATA'[['HEADER1','VALUE1'],['HEADER2','VALUE2'],['HEADER3','VALUE3'],['HEADER4'
,'VALUE','4']]])
	
xl.adddata(['DATA'[['HEADER1','VALUE1'],['HEADER2','VALUE2'],['HEADER3','VALUE3'],['HEADER4'
,'VALUE','4']]])
	
xl.adddata(['DATA'[['HEADER1','VALUE1'],['HEADER2','VALUE2'],['HEADER3','VALUE3'],['HEADER4'
,'VALUE','4']]])
	
-</snip> -


Normally I wouldn't paste an entire file in anemail, but I'm really stuck. Can 
anyone point me in the right direction? part of the problem is that the 
exception error messages are so meaninglkess, and there is almost no 
documentation about library calls for the com32.client module. (guess I could 
always try and read the source code...)

Thanks,
-- 
Thomi Richards,
http://once.sourceforge.net/




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