[pywin32-bugs] [ pywin32-Bugs-1935488 ] gencache and Delphi Currency

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Bugs item #1935488, was opened at 2008-04-06 02:49
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: Santi Wangkerkoon (santiwk)
Assigned to: Nobody/Anonymous (nobody)
Summary: gencache and Delphi Currency

Initial Comment:
Delphi snippet:
procedure Setprice(PriceLevel: Smallint;
pVal: Currency);
	
As pywin32-210's makepy and gencache comes:
def Setprice(self,
PriceLevel=defaultNamedNotOptArg,
arg1=defaultUnnamedArg):
return self._oleobj_.InvokeTypes(4, LCID, 4, (24, 0), ((2, 0), (6, 1)),PriceLevel, arg1)
			
Calling Setprice() causes Variant exception!
I had to change the above python from 
(6, 1) to (4, 1) 
The effect is to change
(pVal: Currency) to (pVal: Single)
	
Is there any other way around ?

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>Comment By: Mark Hammond (mhammond)
Date: 2008-04-09 07:19

Message:
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Thanks for testing this so quickly!  I believe there is no auto conversion
as it is impossible to convert between floats and decimals without losing
precision (ie, one of the main reasons decimal/currency exists is because
it is so much more accurate than floats - and losing this extra accuracy
silently would be bad.

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Comment By: Santi Wangkerkoon (santiwk)
Date: 2008-04-09 02:20

Message:
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pywin32-210.9.win32-py2.5 works great!

I just wonder why there is no implicit conversion between
float/double and Decimal. But that is python story, not pywin32's.

Thank you Mr Hammond, for your promptly fix.

>>> from win32com.client import Dispatch
>>> from decimal import Decimal
>>> Ax = Dispatch('Pycurr.PyCurrency')
>>> Ax.SetpriceCurr(Decimal('100.0'))
>>> Ax.SetpriceCurr(100.0)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<COMObject Pycurr.PyCurrency>", line 2, in SetpriceCurr
TypeError: Currency object must be either a tuple of 2 longs or a Decimal
instance (got float).

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Comment By: Mark Hammond (mhammond)
Date: 2008-04-08 21:55

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I think I just checked in a fix for this.  Would it be possible for you to
test starship.python.net/crew/mhammond/pywin32-210.9.win32-py2.5.exe ?

Checking in TestSources/PyCOMTest/PyCOMImpl.cpp;
new revision: 1.18; previous revision: 1.17
Checking in TestSources/PyCOMTest/PyCOMImpl.h;
new revision: 1.16; previous revision: 1.15
Checking in TestSources/PyCOMTest/PyCOMTest.idl;
new revision: 1.17; previous revision: 1.16
Checking in win32com/src/oleargs.cpp;
new revision: 1.41; previous revision: 1.40
Checking in win32com/src/include/PythonCOM.h;
new revision: 1.27; previous revision: 1.26
Checking in win32com/test/testPyComTest.py;
new revision: 1.30; previous revision: 1.29


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Comment By: Santi Wangkerkoon (santiwk)
Date: 2008-04-08 00:06

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Delete psrvr.zip (Typelib and TRegSvr).
TRegSvr is not required, just run PyCurr.exe
for register.



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Comment By: Santi Wangkerkoon (santiwk)
Date: 2008-04-07 06:05

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psrvr.exe source code is not available,
so I write a small PyCurr.exe for your testing.

Here is the screen shot:

c:\>tregsvr PyCurr.exe

>>> from win32com.client import Dispatch
>>> Ax = Dispatch('PyCurr.PyCurrency')
>>> Ax.SetpriceFloat(100.0)
>>> Ax.SetpriceDouble(100.0)
>>> Ax.SetpriceCurr(100.0)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<COMObject PyCurr.PyCurrency>", line 2, in SetpriceCurr
TypeError: The VARIANT type is unknown (00000006)
File Added: PyCurr.zip

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Comment By: Santi Wangkerkoon (santiwk)
Date: 2008-04-06 17:12

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The typelib is in .exe file.
So I send it with register tool.
(regsvr32 won't work.)

The steps I test :-
...tregsvr psrvr.exe
...makepy.py: psrvr 1.0
File Added: psrvr.zip

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Comment By: Mark Hammond (mhammond)
Date: 2008-04-06 09:08

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I can't think if why this would have changed. Is it possible the COM
object itself changed?  Can you send me the typelib?

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