[python-win32] Problem registering Python COM object

[Mark Hammond]

On 13/08/2009 1:42 PM, Gary Smith wrote:
> Re:  Problem registering Python COM object (suddenly)
>
> Hi,
>
> I’ve been volunteering for the Research Dept. of Selby Botanical Gardens
> here in Sarasota, FL. In support of my project I wrote a Python COM
> server to extend Python’s regular expression capabilities to VB. (I’m
> aware of VB regular expression support, which doesn’t include look-behinds.)
>
> The computer I use at the Gardens has XP SP2 and Access 2003. Two or
> three weeks ago I installed Pywin32 (Active State) at the Gardens by
> downloading the latest version of 2.5 (build 211?). At home I run Active
> State 2.5 211.1.
>
> I believe the software is up-to-date. When I originally installed my
> Python COM object, the Access application ran flawlessly. However, after
> a week’s absence, I can’t even seem to register the COM object (which
> has changed).

What do you mean you can't register it?  What error do you get when you try?

> The symptoms occur during a query that computes a value using the COM
> object. I get the Access message “Error ??? the object doesn’t support
> that method”. If I stop the query with a break point in VB, I can see
> that my object exists (probably from the DIM statement). However, it
> doesn’t seem to be associated with the Python COM object.

Assuming you *can* register it but just fail to use it, you may like to 
google for using --debug when registering, then using the win32trace 
module to look at lots of debug messages which will be spewed out as the 
object is instantiated and attempted to be used.  It could be as simple 
as a syntax error in your .py file...

Cheers,

Mark
>
> Everything works swimmingly at my development computer. Between last
> week’s visit and today’s visit, things won’t work at the Gardens.
>
> The computer there is very low on C: disk space. Could this have an
> effect on win32com’s registration of the COM object?
>
> Is there a method for positive validation that the object is registered?
> The Tools…References menu item doesn’t help, and at my development
> computer it doesn’t show up as an ActiveX component, although it is
> obviously registered and accessible to VB. Also
> Application.COMAddins.Item() doesn’t show it on either machine. This is
> puzzling.
>
> I’ve run out of leads. Any clues, anyone? The code follows, although I
> don’t believe it is the code, but rather some external condition of
> which I’m unaware.
>
> Here is the Python code:
>
> class reObj:
>
> import pythoncom
>
> import re
>
> import string
>
> _public_methods_ =
> ["allMatches","substitute","replaceAll","occurs","listem"]
>
> _reg_progid_ = "Python.reObj"
>
> _reg_clsid_ = pythoncom.CreateGuid()
>
> def __init__ (self):
>
> pass
>
> def allMatches(self, pattern, str):
>
> import re
>
> import string
>
> result=''
>
> matchGroup=re.search(pattern,str)
>
> while matchGroup<>None:
>
> (start,end)=matchGroup.span()
>
> result = result + ", " + str[start:end]
>
> str=str.replace(str[start:end],'',1)
>
> matchGroup=re.search(pattern,str)
>
> return result[2:]
>
> def substitute(self,str,pattern,replacement,count=1):
>
> str=str.replace(pattern,replacement,count)
>
> return str
>
> def replaceAll(self,str,pattern,replacement):
>
> str=str.replace(pattern,replacement)
>
> return str
>
> def occurs(self,str,pattern):
>
> result=''
>
> matchGroup=re.search(pattern,str)
>
> count=0
>
> while matchGroup<>None:
>
> count=count+1
>
> (start,end)=matchGroup.span()
>
> str=str.replace(str[start:end],'',1)
>
> matchGroup=re.search(pattern,str)
>
> return (count)
>
> if __name__ == '__main__':
>
> import win32com.server.register
>
> win32com.server.register.UseCommandLine(reObj)
>
> And here is the VB code that calls it:
>
> Public Function fLatitude(str As String) As String
>
> Dim degreesPattern As String
>
> Dim minutesPattern As String
>
> Dim secondsPattern As String
>
> Dim degrees As String
>
> Dim minutes As String
>
> Dim seconds As String
>
> Dim s As String
>
> Dim ns As String
>
> Dim r As Object
>
> Set r = CreateObject("Python.reObj")
>
> degreesPattern = "(\d+(\.\d+)?[@])"
>
> minutesPattern = "(\s?\d+(\.\d+)?[!])"
>
> secondsPattern = "(\s?\d+(\.\d+)?[=])"
>
> latitudePattern = "(\d+(\.\d+)?[@!=]\s?)+[NS](?=[\s\.,;]|$)"
>
> agn = fAgnosticLatLong(str)
>
> s = r.allMatches(latitudePattern, agn)
>
> If Len(s) = 0 Then
>
> fLatitude = ""
>
> Exit Function
>
> End If
>
> ns = Right(s, 1)
>
> degrees = r.allMatches(degreesPattern, s)
>
> minutes = r.allMatches(minutesPattern, s)
>
> seconds = r.allMatches(secondsPattern, s)
>
> degrees = r.replaceAll(degrees, "@", "*")
>
> minutes = r.replaceAll(minutes, "!", "'")
>
> seconds = r.replaceAll(seconds, "=", """")
>
> fLatitude = degrees & minutes & seconds & ns
>
> Set r = Nothing
>
> End Function
>
> Works perfectly at home, but not at all (now) at the pro-bono client.
>
> If you’ve read this far, my deepest thanks,
>
> Cheers, Gary
>
> ___________________________________
>
> "Even for practical purposes theory generally turns out the most
> important thing in the end." Oliver Wendell Holmes.
>
>
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