[pywin32-bugs] [ pywin32-Bugs-1582720 ] Python long integers aren't translated to Variant/long

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Bugs item #1582720, was opened at 2006-10-23 19:02
Message generated for change (Comment added) made by mhammond
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Category: com
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Matt (matthiaskirst)
Assigned to: Nobody/Anonymous (nobody)
Summary: Python long integers aren't translated to Variant/long

Initial Comment:
Since Version 208 Python long integers are not 
translated to Variant/long type anymore.
I think that is on purpose since long integers have 
undefined precision. 
But isn't it possible to gracefully convert to Variant/
long like in the versions up to 207?
Maybe there is existing code around that can be broken 
by the above mentioned behaviour (like my one).

Test code:

import pythoncom

class Test:
    _public_methods_ = [ 'Test' ]
    _reg_progid_ = "Python.COMTest3"
    _reg_clsid_ = "{2D7DD06A-83D3-4F31-848C-
57AFA22A650D}"
    _reg_clsctx_ = pythoncom.CLSCTX_INPROC_SERVER

    def Test( self ):
        a = long( 0 )
        return a
    
if __name__ == "__main__":
    import win32com.server.register
    print "Registering..."
    win32com.server.register.UseCommandLine( Test )

In VB:

Private Sub Form_Load()

    Dim p As Object
    Dim a
    
    Set p = CreateObject("Python.COMTest3")
    a = p.Test()

End Sub

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>Comment By: Mark Hammond (mhammond)
Date: 2007-08-27 18:39

Message:
Logged In: YES 
user_id=14198
Originator: NO

Yes, we should still use VT_I4 if the value fits, and I broke that.  I
just fixed it, so your example should work again in the next build.

Checking in com/win32com/src/oleargs.cpp;
new revision: 1.39; previous revision: 1.38

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Comment By: yiwamoto (yiwamoto)
Date: 2006-12-12 21:59

Message:
Logged In: YES 
user_id=1666448
Originator: NO

I supporse this problem occurs under VB(VBA) only.
Since version 208, type conversion(Python type --> COM variant type)
program
uses 'VT_UI4'(unsigned int) COM variant type instead of 'VT_I4'(signed
int).

But, VB(VBA) don't support unsigned int type.
I don't know how to solve this problem.

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