[pypy-dev] pypy and the comtypes module

Thomas Heller theller at ctypes.org
Thu Feb 19 21:41:48 CET 2009

[I added comtypes-users to the list of recipients, in case any existing
comtypes users is interested in this]

Amaury Forgeot d'Arc schrieb:
> Hello Thomas, hello to all pypy-ers,
> I'm sure you will be interested to know that the ctypes implementation of pypy
> has matured enough to be able to run the comtypes module,
> at least some of the examples I found on the web site:
> http://starship.python.net/crew/theller/comtypes/
> See the copy of a pypy session below.

Really cool to hear this.  I must say that I sometimes look over the commit messages
in the pypy.cvs mailing list (via gmane) and I'm fascinated by the work with ctypes
that is done there!

What I fear is that the day is not far where you know much more than myself about ctypes ;-)

> Not everything works, though.
> For example, the COMError exception does not give any message,
> some errors are caused by the alternate garbage collector of pypy
> (opposed to the determinism of reference counting),
> and I'm sure that I missed many important details...
> At least it is now possible to run the comtypes test suite: some tests
> even pass ;-)
> Hey, I did not know that ctypes and comtypes where so intricate:
> ctypes obviously has features designed for comtypes only (OUT parameters...)
> and ctypes/__init__.py even tries to import comtypes.server.inprocserver!
> But this was all fun, and I learned a lot about ffi and COM from
> reading the code.
> Thanks for these wonderful modules!
> Python 2.5.2 (61966, Feb 17 2009, 13:39:17)
> [PyPy 1.0.0] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> And now for something completely different: ``who am I and if yes, how many?''
>>>>> from comtypes.client import CreateObject
>>>>> xl = CreateObject("Excel.Application")
> # Generating comtypes.gen._00020813_0000_0000_C000_000000000046_0_1_3
> # Generating comtypes.gen._00020430_0000_0000_C000_000000000046_0_2_0
> # Generating comtypes.gen.stdole
> # Generating comtypes.gen._2DF8D04C_5BFA_101B_BDE5_00AA0044DE52_0_2_1
> # Generating comtypes.gen.Office
> # Generating comtypes.gen._0002E157_0000_0000_C000_000000000046_0_5_3
> # Generating comtypes.gen.VBIDE
> # Generating comtypes.gen.Excel
>>>>> xl.Workbooks.Add()
> <POINTER(_Workbook) ptr=0x16af6c at 35>
>>>>> xl.Range("E1").Formula = "=SUM(A1:D1)"
>>>>> print xl.Range("E1").Value
> 0.0
>>>>> xl.Range("A1", "D1").Value = ("Data", 10, 20, 30)
>>>>> print xl.Range("E1").Value
> 60.0
>>>>> xl.Visible = True
> Cheers,

Fantastic!  I wish I had time to use pypy or even participate, but
there is no chance, unfortunately.


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