Running Python-scripts from Symbian C++ code

[markol]

I have trouble running a Python script from Symbian C++ code. Could someone give me an example of this?

I have tried:

-using CSPyInterpreter, but the code does not compile/link correctly. I have added some headers to Symbian SDK's include from "C:\Symbian\7.0s\Series60_v20\python-port-s60\symbian_python\Include", but it doesn't seem to work. This lead to missing io.h, which doesn't seem to exist. I'm using MS VC++.

-using RApaLsSession::StartApp(const CApaCommandLine& aCommandLine), but I don't know what to use in CApaCommandLine::SetDocumentNameL(const TDesC& aDocName). This almost opens the Pyhton script; the title can be seen, but the application does not run. Maybe something to do with ViewUID's, but I haven't found that concept from the documentation.

If someone has done this, I'll appreciate the help.

--Marko

[otsov]

Originally posted by markol


-using CSPyInterpreter, but the code does not compile/link correctly. I have added some headers to Symbian SDK's include from "C:\Symbian\7.0s\Series60_v20\python-port-s60\symbian_python\Include", but it doesn't seem to work. This lead to missing io.h, which doesn't seem to exist. I'm using MS VC++.

This answer only considers the "CSPyInterpreter"-option:

1) In ".mmp"-file you have to have line:

LIBRARY python222.lib

2) Include:

#include "CSPyInterpreter.h"

3) Running a script (you might want to consider wrapping this e.g. with "CAsyncCallBack"):

CSPyInterpreter* iInterpreter;

iInterpreter = CSPyInterpreter::NewInterpreterL();

TBuf8<KMaxFileName> outputBuffer;

... outputBuffer is filled with a proper script name, e.g. "default.py" ...

char *argv[1];
int argc;
argv[0] = (char*)outputBuffer.PtrZ();
argc = 1;

iInterpreter->RunScript(argc, argv);

delete iInterpreter;
iInterpreter = NULL;

4) If your target is ".exe" you might have to increase the stacksize, for example in ".mmp"-file:

EPOCSTACKSIZE 65536

[markol]

Thanks, I think this will do the trick.

It seems, that the CSPyInterpreter is not included in every version of Python for Series60 SDK. My problem is, that I have to use the Symbian 7.0 SDK (and therefore the Python SDK for that). The CSPyInterpreter seems to be included in the Python SDK for Symbian 8.0 (which is Python_1_0_for_Series60_SDK_2nd_ed_FP2).

My next question is, has anyone lauched Python code using Symbian 7.0 SDK? Adding just the CSPyInterpreter.h to the older environment does not work.

--Marko

[simo.salminen]

Here is how you can use other Python C API. This works with latest 1.1.6 alpha.

<code>
CSPyInterpreter* it = CSPyInterpreter::NewInterpreterL();
CleanupStack::PushL(it);
PyEval_RestoreThread(PYTHON_TLS->thread_state);

PyRun_SimpleString("open(r'c:\\foo.txt', 'w').write('hello')\n");

PyEval_SaveThread();
CleanupStack::PopAndDestroy(it);
</code>

One thing that does not seem to work is calls to appuifw module.

[simo.salminen]

Here is how you can print out error messages from Python C API:

First, define following function:
int PythonOutput(const char *buf, int n)
{
HBufC* buf16 = HBufC::NewLC(n);
buf16->Des().Copy(TPtrC8((unsigned char*)buf, n));
RDebug::Print(_L("[PYTHON ERROR]: %S"), buf16);
CleanupStack::PopAndDestroy();
return n;
}


Then, after interpreter is started, do following:
CSPyInterpreter* it = CSPyInterpreter::NewInterpreterL();
CleanupStack::PushL(it);
it->iStdO = &PythonOutput;


Now you can use if (PyErr_Occurred()) { PyErr_Print(); } to find out about errors.

[nithin]

hii,
I'm new to symbian environment....
I've a small problem here...

I'm writing an application which calls for some python functions...

My Symbian-Python directory is in C:\Symbian\8.0a\S60_2nd_FP2\python-port-s60

While my app is in
C:\Symbian\8.0a\S60_2nd_FP2\Series60Ex

So whn i include Symbian-Python as user include in da mmp file of my application, its taking da address as
..\MyApp\group\C:\Symbian\8.0a\S60_2nd_FP2\Series60Ex

I need some help in this regard...its really urgent...so plz reply if some1 can help me in dis regard....