scipy tutorial - Baustatik-Info-Server

}
return Py::List(py_obj);
static Py::String py_to_string(PyObject* py_obj,char* name)
{
if (!PyString_Check(py_obj))
handle_bad_type(py_obj,"string", name);
return Py::String(py_obj);
}
static Py::Dict py_to_dict(PyObject* py_obj,char* name)
{
if (!py_obj || !PyDict_Check(py_obj))
handle_bad_type(py_obj,"dict", name);
return Py::Dict(py_obj);
}
static Py::Tuple py_to_tuple(PyObject* py_obj,char* name)
{
if (!py_obj || !PyTuple_Check(py_obj))
handle_bad_type(py_obj,"tuple", name);
return Py::Tuple(py_obj);
}
SciPy Reference Guide, Release 0.8.dev
SCXX handles reference counts on for strings, lists, tuples, and dictionaries, so clean up code isn’t necessary.
File Conversion
For the following code,
>>> a = open("bob",’w’)
>>> inline("",[’a’])
The argument conversion code is:
/* argument conversion code */
PyObject* py_a = get_variable("a",raw_locals,raw_globals);
FILE* a = py_to_file(py_a,"a");
get_variable() reads the variable a from the local and global namespaces. py_to_file() converts PyObject*
to a FILE* and increments the reference count of the PyObject*:
FILE* py_to_file(PyObject* py_obj, char* name)
{
if (!py_obj || !PyFile_Check(py_obj))
handle_bad_type(py_obj,"file", name);
}
Py_INCREF(py_obj);
return PyFile_AsFile(py_obj);
Because the PyObject* was incremented, the clean up code needs to decrement the counter
/* cleanup code */
Py_XDECREF(py_a);
1.12. Weave 107