scipy tutorial - Baustatik-Info-Server

SciPy Reference Guide, Release 0.8.dev
>>> a = 1
>>> inline("",[’a’])
The argument conversion code inserted for a is:
/* argument conversion code */
int a = py_to_int (get_variable("a",raw_locals,raw_globals),"a");
get_variable() reads the variable a from the local and global namespaces. py_to_int() has the following
form:
static int py_to_int(PyObject* py_obj,char* name)
{
if (!py_obj || !PyInt_Check(py_obj))
handle_bad_type(py_obj,"int", name);
return (int) PyInt_AsLong(py_obj);
}
Similarly, the float and complex conversion routines look like:
static double py_to_float(PyObject* py_obj,char* name)
{
if (!py_obj || !PyFloat_Check(py_obj))
handle_bad_type(py_obj,"float", name);
return PyFloat_AsDouble(py_obj);
}
static std::complex py_to_complex(PyObject* py_obj,char* name)
{
if (!py_obj || !PyComplex_Check(py_obj))
handle_bad_type(py_obj,"complex", name);
return std::complex(PyComplex_RealAsDouble(py_obj),
PyComplex_ImagAsDouble(py_obj));
}
NumPy conversions do not require any clean up code.
String, List, Tuple, and Dictionary Conversion
Strings, Lists, Tuples and Dictionary conversions are all converted to SCXX types by default. For the following code,
>>> a = [1]
>>> inline("",[’a’])
The argument conversion code inserted for a is:
/* argument conversion code */
Py::List a = py_to_list(get_variable("a",raw_locals,raw_globals),"a");
get_variable() reads the variable a from the local and global namespaces. py_to_list() and its friends has
the following form:
static Py::List py_to_list(PyObject* py_obj,char* name)
{
if (!py_obj || !PyList_Check(py_obj))
handle_bad_type(py_obj,"list", name);
106 Chapter 1. SciPy Tutorial