Archived:How to embed Python in Symbian C++

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Created: cyke64 (12 Apr 2007)
Last edited: hamishwillee (31 May 2013)

It's pretty common to want to extend S60 Python by adding functionality available to the underlying S60 C++ APIs. You can extend Python with C++. But, you can also embed a Python interpreter inside !

Add the following code, which does a lot of setup, but calls the function foo in the module Bar.

 TInt retVal(KErrNone);
// Create a Python interpreter
CSPyInterpreter* it = CSPyInterpreter::NewInterpreterL();
// Save state of any current Python interpreter, and acquire the
// interpreter lock
char *module_name = "Bar" ;
char *foo = "foo" ;
char *response = NULL ;
TInt32 r_len = 0 ;
PyObject *pModule = PyImport_ImportModule(module_name) ;
if ( pModule != NULL )
PyObject *module_dict = PyModule_GetDict(pModule);
PyObject *expression = PyDict_GetItemString(module_dict, pre_handler);
PyObject *arglist = Py_BuildValue("(s#)", aString.Ptr(),aString.Length()) ;
PyObject *result = PyEval_CallObject(expression, arglist);
response = PyString_AsString( result ) ;
r_len = strlen( response ) ;
// Make a Symbian descriptor pointer to the char * response
TPtrC8 symResponse((TUint8*)response, r_len ) ;
// Clean-up, and restore thread state

# module Bar.py
# function 'foo' in the module 'Bar'.
# A string value is passed to the Python function
# and a string value is returned
def foo(message):
return 'foo got message: ' + message

link : documentation Python Chapter 9.1 Extending and embedding

This page was last modified on 31 May 2013, at 04:03.
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