#include <Python.h>#include <stdio.h>#include <stddef.h>  #include <frameobject.h>/* back port from Python 3 */#ifndef Py_BUILD_ASSERT_EXPR/* Assert a build-time dependency, as an expression.   Your compile will fail if the condition isn't true, or can't be evaluated   by the compiler. This can be used in an expression: its value is 0.   Example:   #define foo_to_char(foo)  \       ((char *)(foo)        \        + Py_BUILD_ASSERT_EXPR(offsetof(struct foo, string) == 0))   Written by Rusty Russell, public domain, http://ccodearchive.net/ */#define Py_BUILD_ASSERT_EXPR(cond) \    (sizeof(char [1 - 2*!(cond)]) - 1)#endif#ifndef Py_MEMBER_SIZE/* Get the size of a structure member in bytes */#define Py_MEMBER_SIZE(type, member) sizeof(((type *)0)->member)#endif/* A definition from Stackless Python */#ifndef Py_TPFLAGS_HAVE_STACKLESS_CALL#define Py_TPFLAGS_HAVE_STACKLESS_CALL (1UL<<15)#endif/* A portable test, that does not initialize the Stackless subsystem.  */#define IS_STACKLESS_PYTHON() PyType_HasFeature(&PyFunction_Type, Py_TPFLAGS_HAVE_STACKLESS_CALL)/* The offset of the PyFrameObject fields "f_code" and "f_localsplus" differs between  * C-Python and Stackless Python. Therefore the offset has to be computed at run-time. */#define PYFRAME_LOCALSPLUS_OFFSET \  ((void)Py_BUILD_ASSERT_EXPR(sizeof(PyFrameObject) == offsetof(PyFrameObject, f_localsplus) + Py_MEMBER_SIZE(PyFrameObject, f_localsplus)), \   (PyFrame_Type.tp_basicsize - Py_MEMBER_SIZE(PyFrameObject, f_localsplus)))#define PYFRAME_CODE_OFFSET \  ((void)Py_BUILD_ASSERT_EXPR(sizeof(PyFrameObject) == offsetof(PyFrameObject, f_localsplus) + Py_MEMBER_SIZE(PyFrameObject, f_localsplus)), \   (IS_STACKLESS_PYTHON() ? (PyFrame_Type.tp_basicsize - Py_MEMBER_SIZE(PyFrameObject, f_localsplus) - Py_MEMBER_SIZE(PyFrameObject, f_code)) : \    (offsetof(PyFrameObject, f_back) + Py_MEMBER_SIZE(PyFrameObject, f_back))))/* Portable (between C-Python and Stackless) macros for PyFrameObject */#define PYFRAME_BACK(frame)          ((frame)->f_back)#define PYFRAME_CODE(frame)          (*((PyCodeObject **)(((char *)(frame)) + PYFRAME_CODE_OFFSET)))#define PYFRAME_BUILTINS(frame)      ((frame)->f_builtins)#define PYFRAME_GLOBALS(frame)       ((frame)->f_globals)#define PYFRAME_LOCALS(frame)        ((frame)->f_locals)#define PYFRAME_VALUESTACK(frame)    ((frame)->f_valuestack)#define PYFRAME_STACKTOP(frame)      ((frame)->f_stacktop)#define PYFRAME_TRACE(frame)         ((frame)->f_trace)#define PYFRAME_TRACE_LINES(frame)   ((frame)->f_trace_opcodes)#define PYFRAME_TRACE_OPCODES(frame) ((frame)->f_trace_lines)#define PYFRAME_GEN(frame)           ((frame)->f_gen)#define PYFRAME_EXC_TYPE(frame)      ((frame)->f_exc_type)#define PYFRAME_EXC_VALUE(frame)     ((frame)->f_exc_value)#define PYFRAME_EXC_TRACEBACK(frame) ((frame)->f_exc_traceback)#define PYFRAME_TSTATE(frame)        ((frame)->f_tstate)#define PYFRAME_LASTI(frame)         ((frame)->f_lasti)#define PYFRAME_LINENO(frame)        ((frame)->f_lineno)#define PYFRAME_IBLOCK(frame)        ((frame)->f_iblock)#define PYFRAME_EXECUTING(frame)     ((frame)->f_executing)#define PYFRAME_BLOCKSTACK(frame)    ((frame)->f_blockstack)#define PYFRAME_LOCALSPLUS(frame)    ((PyObject **)(((char *)(frame)) + PYFRAME_LOCALSPLUS_OFFSET))#ifdef STACKLESS#define PYFRAME_EXECUTE(frame)       ((frame)->f_execute)#endif/***************************************************** * Minimal extension module code below this line *****************************************************/#if PY_MAJOR_VERSION >= 3static struct PyModuleDef framedemomodule = {    PyModuleDef_HEAD_INIT,    "framedemo",   /* name of module */    NULL,          /* module documentation, may be NULL */    -1,            /* size of per-interpreter state of the module,                      or -1 if the module keeps state in global variables. */};PyMODINIT_FUNCPyInit_framedemo(void)#elsevoidinitframedemo(void)#endif{    printf("offsetof(PyFrame_Object, f_localsplus) = %zu\n", PYFRAME_LOCALSPLUS_OFFSET);    printf("offsetof(PyFrame_Object, f_code) = %zu\n", PYFRAME_CODE_OFFSET);#if PY_MAJOR_VERSION >= 3    return PyModule_Create(&framedemomodule);#else    Py_InitModule("framedemo", NULL);#endif}

from distutils.core import setup, Extensionmodule1 = Extension('framedemo', sources = ['framedemomodule.c'])setup (name = 'FrameDemo',       version = '0.0',       description = 'This demo shows how to access a PyFrameObject',       ext_modules = [module1])