Data exchange between Delphi and Python (Win)
gagsl-py2 at yahoo.com.ar
Fri Jan 29 23:08:45 CET 2010
En Thu, 28 Jan 2010 05:07:00 -0300, Durumdara <durumdara at gmail.com>
> I have an exotic db, with exotic drivers, and it have buggy ODBC driver.
> But I have native driver - under Delphi.
> I need to access this DB under Pylons (or mod_python).
> I think to COM/OLE, because it is accessable from all program, and I
> to DLL (but DLL have problematic parameterisation).
So, you can query the database in Delphi, and you want to be able to do
that from Python.
Your two ideas are feasible: you may write a DLL (or a COM object) in
Delphi, that takes a query string, executes it, and returns the resulting
data. All in Delphi code, no Python involved. Keep the memory allocation
in Delphi - allocate and return a plain PChar buffer, and include a free()
function to deallocate it when the other side is done using it.
From Python, you may use ctypes  to call the DLL functions, or pywin32
 to invoke the COM object. Both ways are easy enough.
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