| 网站首页 | 业界新闻 | 小组 | 威客 | 人才 | 下载频道 | 博客 | 代码贴 | 在线编程 | 编程论坛
欢迎加入我们,一同切磋技术
用户名:   
 
密 码:  
共有 6000 人关注过本帖
标题:求助,关于sys模块文件在哪个文件中
只看楼主 加入收藏
wjphero
Rank: 1
等 级:新手上路
帖 子:5
专家分:0
注 册:2011-1-5
结帖率:100%
收藏
已结贴  问题点数:0 回复次数:10 
求助,关于sys模块文件在哪个文件中
大虾帮忙,编写python代码时,经常在前面加入import sys,不知这个sys是在哪个文件中,怎样修改sys模块中的内容?
搜索更多相关主题的帖子: python import 
2011-01-05 15:18
lampeter123
Rank: 16Rank: 16Rank: 16Rank: 16
等 级:版主
威 望:54
帖 子:2508
专家分:6424
注 册:2009-1-30
收藏
得分:20 
程序代码:
# AUTO-GENERATED FILE -- DO NOT EDIT
# OVERRIDES FILE: static-pi-files\1.5\sysoverride.py

""" This module provides access to some objects used or maintained by the
interpreter and to functions that interact strongly with the interpreter.

Dynamic objects:

argv -- command line arguments; argv[0] is the script pathname if known
path -- module search path; path[0] is the script directory, else ''
modules -- dictionary of loaded modules

displayhook -- called to show results in an interactive session
excepthook -- called to handle any uncaught exception other than SystemExit
  To customize printing in an interactive session or to install a custom
  top-level exception handler, assign other functions to replace these.

exitfunc -- if sys.exitfunc exists, this routine is called when Python exits
  Assigning to sys.exitfunc is deprecated; use the atexit module instead.

stdin -- standard input file object; used by raw_input() and input()
stdout -- standard output file object; used by the print statement
stderr -- standard error object; used for error messages
  By assigning other file objects (or objects that behave like files)
  to these, it is possible to redirect all of the interpreter's I/O.

last_type -- type of last uncaught exception
last_value -- value of last uncaught exception
last_traceback -- traceback of last uncaught exception
  These three are only available in an interactive session after a
  traceback has been printed.

exc_type -- type of exception currently being handled
exc_value -- value of exception currently being handled
exc_traceback -- traceback of exception currently being handled
  The function exc_info() should be used instead of these three,
  because it is thread-safe.

Static objects:

maxint -- the largest supported integer (the smallest is -maxint-1)
maxunicode -- the largest supported character
builtin_module_names -- tuple of module names built into this interpreter
version -- the version of this interpreter as a string
version_info -- version information as a tuple
hexversion -- version information encoded as a single integer
copyright -- copyright notice pertaining to this interpreter
platform -- platform identifier
executable -- pathname of this Python interpreter
prefix -- prefix used to find the Python library
exec_prefix -- prefix used to find the machine-specific Python library
dllhandle -- [Windows only] integer handle of the Python DLL
winver -- [Windows only] version number of the Python DLL
__stdin__ -- the original stdin; don't touch!
__stdout__ -- the original stdout; don't touch!
__stderr__ -- the original stderr; don't touch!
__displayhook__ -- the original displayhook; don't touch!
__excepthook__ -- the original excepthook; don't touch!

Functions:

displayhook() -- print an object to the screen, and save it in __builtin__._
excepthook() -- print an exception and its traceback to sys.stderr
exc_info() -- return thread-safe information about the current exception
exc_clear() -- clear the exception state for the current thread
exit() -- exit the interpreter by raising SystemExit
getdlopenflags() -- returns flags to be used for dlopen() calls
getrefcount() -- return the reference count for an object (plus one :-)
getrecursionlimit() -- return the max recursion depth for the interpreter
setcheckinterval() -- control how often the interpreter checks for events
setdlopenflags() -- set the flags to be used for dlopen() calls
setprofile() -- set the global profiling function
setrecursionlimit() -- set the max recursion depth for the interpreter
settrace() -- set the global debug tracing function

 """

def __displayhook__(object):
  """ displayhook(object) -> None

 
  Print an object to sys.stdout and also save it in __builtin__.
   """
  return None

def __excepthook__(exctype, value, traceback):
  """ excepthook(exctype, value, traceback) -> None

 
  Handle an exception by displaying it with a traceback on sys.stderr.
   """
  return None

def _current_frames(arg):
  """ _current_frames() -> dictionary

 
  Return a dictionary mapping each current thread T's thread id to T's
  current stack frame.

 
  This function should be used for specialized purposes only. """
  return {}

def _getframe(depth=None):
  """ _getframe([depth]) -> frameobject

 
  Return a frame object from the call stack.  If optional integer depth is
  given, return the frame object that many calls below the top of the stack.
  If that is deeper than the call stack, ValueError is raised.  The default
  for depth is zero, returning the frame at the top of the call stack.

 
  This function should be used for internal and specialized
  purposes only. """
  return None

api_version = 1013
byteorder = 'little'

def call_tracing(func, args):
  """ call_tracing(func, args) -> object

 
  Call func(*args), while tracing is enabled.  The tracing state is
  saved, and restored afterwards.  This is intended to be called from
  a debugger from a checkpoint, to recursively debug some other code. """
  return None

def callstats(arg):
  """ callstats() -> tuple of integers

 
  Return a tuple of function call statistics, if CALL_PROFILE was defined
  when Python was built.  Otherwise, return None.

 
  When enabled, this function returns detailed, implementation-specific
  details about the number of function calls executed. The return value is
  a 11-tuple where the entries in the tuple are counts of:
  0. all function calls
  1. calls to PyFunction_Type objects
  2. PyFunction calls that do not create an argument tuple
  3. PyFunction calls that do not create an argument tuple
     and bypass PyEval_EvalCodeEx()
  4. PyMethod calls
  5. PyMethod calls on bound methods
  6. PyType calls
  7. PyCFunction calls
  8. generator calls
  9. All other calls
  10. Number of stack pops performed by call_function() """
  return ()

def displayhook(object):
  """ displayhook(object) -> None

 
  Print an object to sys.stdout and also save it in __builtin__.
   """
  return None

def exc_clear(arg):
  """ exc_clear() -> None

 
  Clear global information on the current exception.  Subsequent calls to
  exc_info() will return (None,None,None) until another exception is raised
  in the current thread or the execution stack returns to a frame where
  another exception is being handled. """
  return None

def exc_info(arg):
  """ exc_info() -> (type, value, traceback)

 
  Return information about the most recent exception caught by an except
  clause in the current stack frame or in an older stack frame. """
  return (None, None, None)

def excepthook(exctype, value, traceback):
  """ excepthook(exctype, value, traceback) -> None

 
  Handle an exception by displaying it with a traceback on sys.stderr.
   """
  return None

def exit(status=None):
  """ exit([status])

 
  Exit the interpreter by raising SystemExit(status).
  If the status is omitted or None, it defaults to zero (i.e., success).
  If the status is numeric, it will be used as the system exit status.
  If it is another kind of object, it will be printed and the system
  exit status will be one (i.e., failure). """
  pass

def getcheckinterval(arg):
  """ getcheckinterval() -> current check interval; see setcheckinterval(). """
  return 1

def getdefaultencoding(arg):
  """ getdefaultencoding() -> string

 
  Return the current default string encoding used by the Unicode
  implementation. """
  return ""

def getfilesystemencoding(arg):
  """ getfilesystemencoding() -> string

 
  Return the encoding used to convert Unicode filenames in
  operating system filenames. """
  return ""

def getrecursionlimit(arg):
  """ getrecursionlimit()

 
  Return the current value of the recursion limit, the maximum depth
  of the Python interpreter stack.  This limit prevents infinite
  recursion from causing an overflow of the C stack and crashing Python. """
  pass

def getrefcount(object):
  """ getrefcount(object) -> integer

 
  Return the reference count of object.  The count returned is generally
  one higher than you might expect, because it includes the (temporary)
  reference as an argument to getrefcount(). """
  return 1

def getwindowsversion(arg):
  """ getwindowsversion()

 
  Return information about the running version of Windows.
  The result is a tuple of (major, minor, build, platform, text)
  All elements are numbers, except text which is a string.
  Platform may be 0 for win32s, 1 for Windows 9x/ME, 2 for Windows NT/2000/XP
   """
  pass

maxunicode = 65535
meta_path = []
path_hooks = []
path_importer_cache = {}

def setcheckinterval(n):
  """ setcheckinterval(n)

 
  Tell the Python interpreter to check for asynchronous events every
  n instructions.  This also affects how often thread switches occur. """
  pass

def setprofile(function):
  """ setprofile(function)

 
  Set the profiling function.  It will be called on each function call
  and return.  See the profiler chapter in the library manual. """
  pass

def setrecursionlimit(n):
  """ setrecursionlimit(n)

 
  Set the maximum depth of the Python interpreter stack to n.  This
  limit prevents infinite recursion from causing an overflow of the C
  stack and crashing Python.  The highest possible limit is platform-
  dependent. """
  pass

def settrace(function):
  """ settrace(function)

 
  Set the global debug tracing function.  It will be called on each
  function call.  See the debugger chapter in the library manual. """
  pass

subversion = ()
version_info = ()
warnoptions = []
# BEGIN MANUAL OVERRIDES FROM static-pi-files\1.5\sysoverride.py
stdout = file(__file__)
prefix = ''
maxint = 0
__stdin__ = file(__file__)
exc_type = None
executable = ''
winver = 0
copyright = ''
builtin_module_names = ()
exc_traceback = None
exec_prefix = ''
platform = ''
version = ''
exc_value = None
last_traceback = None
argv = []
__stdout__ = file(__file__)
path = []
__stderr__ = file(__file__)
dllhandle = 0
exitfunc = None
stdin = file(__file__)
modules = {}
last_type = None
stderr = file(__file__)
last_value = None
hexversion = 17105408

# END MANUAL OVERRIDES

我是用Wing IDE查看的,如果修改了sys内容,可能会让系统瘫痪, 要三思而行

你的优秀和我的人生无关!!!!
    
    我要过的,是属于我自己的生活~~~
2011-01-05 15:50
wjphero
Rank: 1
等 级:新手上路
帖 子:5
专家分:0
注 册:2011-1-5
收藏
得分:0 
回复 2楼 lampeter123
楼上的大侠能否告知上面的代码是在哪个文件中的啊?好像没有找到sysoverride.py这个文件啊。我用的是python 2.5

[ 本帖最后由 wjphero 于 2011-1-5 16:45 编辑 ]
2011-01-05 16:42
wjphero
Rank: 1
等 级:新手上路
帖 子:5
专家分:0
注 册:2011-1-5
收藏
得分:0 
/* System module */

/*
Various bits of information used by the interpreter are collected in
module 'sys'.
Function member:
- exit(sts): raise SystemExit
Data members:
- stdin, stdout, stderr: standard file objects
- modules: the table of modules (dictionary)
- path: module search path (list of strings)
- argv: script arguments (list of strings)
- ps1, ps2: optional primary and secondary prompts (strings)
*/

#include "Python.h"
#include "code.h"
#include "frameobject.h"
#include "eval.h"

#include "osdefs.h"

#ifdef MS_WINDOWS
#define WIN32_LEAN_AND_MEAN
#include "windows.h"
#endif /* MS_WINDOWS */

#ifdef MS_COREDLL
extern void *PyWin_DLLhModule;
/* A string loaded from the DLL at startup: */
extern const char *PyWin_DLLVersionString;
#endif

#ifdef __VMS
#include <unixlib.h>
#endif

#ifdef MS_WINDOWS
#include <windows.h>
#endif

#ifdef HAVE_LANGINFO_H
#include <locale.h>
#include <langinfo.h>
#endif

PyObject *
PySys_GetObject(char *name)
{
    PyThreadState *tstate = PyThreadState_GET();
    PyObject *sd = tstate->interp->sysdict;
    if (sd == NULL)
        return NULL;
    return PyDict_GetItemString(sd, name);
}

FILE *
PySys_GetFile(char *name, FILE *def)
{
    FILE *fp = NULL;
    PyObject *v = PySys_GetObject(name);
    if (v != NULL && PyFile_Check(v))
        fp = PyFile_AsFile(v);
    if (fp == NULL)
        fp = def;
    return fp;
}

int
PySys_SetObject(char *name, PyObject *v)
{
    PyThreadState *tstate = PyThreadState_GET();
    PyObject *sd = tstate->interp->sysdict;
    if (v == NULL) {
        if (PyDict_GetItemString(sd, name) == NULL)
            return 0;
        else
            return PyDict_DelItemString(sd, name);
    }
    else
        return PyDict_SetItemString(sd, name, v);
}

static PyObject *
sys_displayhook(PyObject *self, PyObject *o)
{
    PyObject *outf;
    PyInterpreterState *interp = PyThreadState_GET()->interp;
    PyObject *modules = interp->modules;
    PyObject *builtins = PyDict_GetItemString(modules, "__builtin__");

    if (builtins == NULL) {
        PyErr_SetString(PyExc_RuntimeError, "lost __builtin__");
        return NULL;
    }

    /* Print value except if None */
    /* After printing, also assign to '_' */
    /* Before, set '_' to None to avoid recursion */
    if (o == Py_None) {
        Py_INCREF(Py_None);
        return Py_None;
    }
    if (PyObject_SetAttrString(builtins, "_", Py_None) != 0)
        return NULL;
    if (Py_FlushLine() != 0)
        return NULL;
    outf = PySys_GetObject("stdout");
    if (outf == NULL) {
        PyErr_SetString(PyExc_RuntimeError, "lost sys.stdout");
        return NULL;
    }
    if (PyFile_WriteObject(o, outf, 0) != 0)
        return NULL;
    PyFile_SoftSpace(outf, 1);
    if (Py_FlushLine() != 0)
        return NULL;
    if (PyObject_SetAttrString(builtins, "_", o) != 0)
        return NULL;
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(displayhook_doc,
"displayhook(object) -> None\n"
"\n"
"Print an object to sys.stdout and also save it in __builtin__.\n"
);

static PyObject *
sys_excepthook(PyObject* self, PyObject* args)
{
    PyObject *exc, *value, *tb;
    if (!PyArg_UnpackTuple(args, "excepthook", 3, 3, &exc, &value, &tb))
        return NULL;
    PyErr_Display(exc, value, tb);
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(excepthook_doc,
"excepthook(exctype, value, traceback) -> None\n"
"\n"
"Handle an exception by displaying it with a traceback on sys.stderr.\n"
);

static PyObject *
sys_exc_info(PyObject *self, PyObject *noargs)
{
    PyThreadState *tstate;
    tstate = PyThreadState_GET();
    return Py_BuildValue(
        "(OOO)",
        tstate->exc_type != NULL ? tstate->exc_type : Py_None,
        tstate->exc_value != NULL ? tstate->exc_value : Py_None,
        tstate->exc_traceback != NULL ?
            tstate->exc_traceback : Py_None);
}

PyDoc_STRVAR(exc_info_doc,
"exc_info() -> (type, value, traceback)\n\
\n\
Return information about the most recent exception caught by an except\n\
clause in the current stack frame or in an older stack frame."
);

static PyObject *
sys_exc_clear(PyObject *self, PyObject *noargs)
{
    PyThreadState *tstate = PyThreadState_GET();
    PyObject *tmp_type, *tmp_value, *tmp_tb;
    tmp_type = tstate->exc_type;
    tmp_value = tstate->exc_value;
    tmp_tb = tstate->exc_traceback;
    tstate->exc_type = NULL;
    tstate->exc_value = NULL;
    tstate->exc_traceback = NULL;
    Py_XDECREF(tmp_type);
    Py_XDECREF(tmp_value);
    Py_XDECREF(tmp_tb);
    /* For b/w compatibility */
    PySys_SetObject("exc_type", Py_None);
    PySys_SetObject("exc_value", Py_None);
    PySys_SetObject("exc_traceback", Py_None);
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(exc_clear_doc,
"exc_clear() -> None\n\
\n\
Clear global information on the current exception.  Subsequent calls to\n\
exc_info() will return (None,None,None) until another exception is raised\n\
in the current thread or the execution stack returns to a frame where\n\
another exception is being handled."
);

static PyObject *
sys_exit(PyObject *self, PyObject *args)
{
    PyObject *exit_code = 0;
    if (!PyArg_UnpackTuple(args, "exit", 0, 1, &exit_code))
        return NULL;
    /* Raise SystemExit so callers may catch it or clean up. */
    PyErr_SetObject(PyExc_SystemExit, exit_code);
    return NULL;
}

PyDoc_STRVAR(exit_doc,
"exit([status])\n\
\n\
Exit the interpreter by raising SystemExit(status).\n\
If the status is omitted or None, it defaults to zero (i.e., success).\n\
If the status is numeric, it will be used as the system exit status.\n\
If it is another kind of object, it will be printed and the system\n\
exit status will be one (i.e., failure)."
);

#ifdef Py_USING_UNICODE

static PyObject *
sys_getdefaultencoding(PyObject *self)
{
    return PyString_FromString(PyUnicode_GetDefaultEncoding());
}

PyDoc_STRVAR(getdefaultencoding_doc,
"getdefaultencoding() -> string\n\
\n\
Return the current default string encoding used by the Unicode \n\
implementation."
);

static PyObject *
sys_setdefaultencoding(PyObject *self, PyObject *args)
{
    char *encoding;
    if (!PyArg_ParseTuple(args, "s:setdefaultencoding", &encoding))
        return NULL;
    if (PyUnicode_SetDefaultEncoding(encoding))
            return NULL;
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(setdefaultencoding_doc,
"setdefaultencoding(encoding)\n\
\n\
Set the current default string encoding used by the Unicode implementation."
);

static PyObject *
sys_getfilesystemencoding(PyObject *self)
{
    if (Py_FileSystemDefaultEncoding)
        return PyString_FromString(Py_FileSystemDefaultEncoding);
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(getfilesystemencoding_doc,
"getfilesystemencoding() -> string\n\
\n\
Return the encoding used to convert Unicode filenames in\n\
operating system filenames."
);

#endif

/*
 * Cached interned string objects used for calling the profile and
 * trace functions.  Initialized by trace_init().
 */
static PyObject *whatstrings[7] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};

static int
trace_init(void)
{
    static char *whatnames[7] = {"call", "exception", "line", "return",
                    "c_call", "c_exception", "c_return"};
    PyObject *name;
    int i;
    for (i = 0; i < 7; ++i) {
        if (whatstrings[i] == NULL) {
            name = PyString_InternFromString(whatnames[i]);
            if (name == NULL)
                return -1;
            whatstrings[i] = name;
                }
    }
    return 0;
}


static PyObject *
call_trampoline(PyThreadState *tstate, PyObject* callback,
        PyFrameObject *frame, int what, PyObject *arg)
{
    PyObject *args = PyTuple_New(3);
    PyObject *whatstr;
    PyObject *result;

    if (args == NULL)
        return NULL;
    Py_INCREF(frame);
    whatstr = whatstrings[what];
    Py_INCREF(whatstr);
    if (arg == NULL)
        arg = Py_None;
    Py_INCREF(arg);
    PyTuple_SET_ITEM(args, 0, (PyObject *)frame);
    PyTuple_SET_ITEM(args, 1, whatstr);
    PyTuple_SET_ITEM(args, 2, arg);

    /* call the Python-level function */
    PyFrame_FastToLocals(frame);
    result = PyEval_CallObject(callback, args);
    PyFrame_LocalsToFast(frame, 1);
    if (result == NULL)
        PyTraceBack_Here(frame);

    /* cleanup */
    Py_DECREF(args);
    return result;
}

static int
profile_trampoline(PyObject *self, PyFrameObject *frame,
           int what, PyObject *arg)
{
    PyThreadState *tstate = frame->f_tstate;
    PyObject *result;

    if (arg == NULL)
        arg = Py_None;
    result = call_trampoline(tstate, self, frame, what, arg);
    if (result == NULL) {
        PyEval_SetProfile(NULL, NULL);
        return -1;
    }
    Py_DECREF(result);
    return 0;
}

static int
trace_trampoline(PyObject *self, PyFrameObject *frame,
         int what, PyObject *arg)
{
    PyThreadState *tstate = frame->f_tstate;
    PyObject *callback;
    PyObject *result;

    if (what == PyTrace_CALL)
        callback = self;
    else
        callback = frame->f_trace;
    if (callback == NULL)
        return 0;
    result = call_trampoline(tstate, callback, frame, what, arg);
    if (result == NULL) {
        PyEval_SetTrace(NULL, NULL);
        Py_XDECREF(frame->f_trace);
        frame->f_trace = NULL;
        return -1;
    }
    if (result != Py_None) {
        PyObject *temp = frame->f_trace;
        frame->f_trace = NULL;
        Py_XDECREF(temp);
        frame->f_trace = result;
    }
    else {
        Py_DECREF(result);
    }
    return 0;
}

static PyObject *
sys_settrace(PyObject *self, PyObject *args)
{
    if (trace_init() == -1)
        return NULL;
    if (args == Py_None)
        PyEval_SetTrace(NULL, NULL);
    else
        PyEval_SetTrace(trace_trampoline, args);
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(settrace_doc,
"settrace(function)\n\
\n\
Set the global debug tracing function.  It will be called on each\n\
function call.  See the debugger chapter in the library manual."
);

static PyObject *
sys_setprofile(PyObject *self, PyObject *args)
{
    if (trace_init() == -1)
        return NULL;
    if (args == Py_None)
        PyEval_SetProfile(NULL, NULL);
    else
        PyEval_SetProfile(profile_trampoline, args);
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(setprofile_doc,
"setprofile(function)\n\
\n\
Set the profiling function.  It will be called on each function call\n\
and return.  See the profiler chapter in the library manual."
);

static PyObject *
sys_setcheckinterval(PyObject *self, PyObject *args)
{
    if (!PyArg_ParseTuple(args, "i:setcheckinterval", &_Py_CheckInterval))
        return NULL;
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(setcheckinterval_doc,
"setcheckinterval(n)\n\
\n\
Tell the Python interpreter to check for asynchronous events every\n\
n instructions.  This also affects how often thread switches occur."
);

static PyObject *
sys_getcheckinterval(PyObject *self, PyObject *args)
{
    return PyInt_FromLong(_Py_CheckInterval);
}

PyDoc_STRVAR(getcheckinterval_doc,
"getcheckinterval() -> current check interval; see setcheckinterval()."
);

#ifdef WITH_TSC
static PyObject *
sys_settscdump(PyObject *self, PyObject *args)
{
    int bool;
    PyThreadState *tstate = PyThreadState_Get();

    if (!PyArg_ParseTuple(args, "i:settscdump", &bool))
        return NULL;
    if (bool)
        tstate->interp->tscdump = 1;
    else
        tstate->interp->tscdump = 0;
    Py_INCREF(Py_None);
    return Py_None;

}

PyDoc_STRVAR(settscdump_doc,
"settscdump(bool)\n\
\n\
If true, tell the Python interpreter to dump VM measurements to\n\
stderr.  If false, turn off dump.  The measurements are based on the\n\
processor's time-stamp counter."
);
#endif /* TSC */

static PyObject *
sys_setrecursionlimit(PyObject *self, PyObject *args)
{
    int new_limit;
    if (!PyArg_ParseTuple(args, "i:setrecursionlimit", &new_limit))
        return NULL;
    if (new_limit <= 0) {
        PyErr_SetString(PyExc_ValueError,
                "recursion limit must be positive");
        return NULL;
    }
    Py_SetRecursionLimit(new_limit);
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(setrecursionlimit_doc,
"setrecursionlimit(n)\n\
\n\
Set the maximum depth of the Python interpreter stack to n.  This\n\
limit prevents infinite recursion from causing an overflow of the C\n\
stack and crashing Python.  The highest possible limit is platform-\n\
dependent."
);

static PyObject *
sys_getrecursionlimit(PyObject *self)
{
    return PyInt_FromLong(Py_GetRecursionLimit());
}

PyDoc_STRVAR(getrecursionlimit_doc,
"getrecursionlimit()\n\
\n\
Return the current value of the recursion limit, the maximum depth\n\
of the Python interpreter stack.  This limit prevents infinite\n\
recursion from causing an overflow of the C stack and crashing Python."
);

#ifdef MS_WINDOWS
PyDoc_STRVAR(getwindowsversion_doc,
"getwindowsversion()\n\
\n\
Return information about the running version of Windows.\n\
The result is a tuple of (major, minor, build, platform, text)\n\
All elements are numbers, except text which is a string.\n\
Platform may be 0 for win32s, 1 for Windows 9x/ME, 2 for Windows NT/2000/XP\n\
"
);

static PyObject *
sys_getwindowsversion(PyObject *self)
{
    OSVERSIONINFO ver;
    ver.dwOSVersionInfoSize = sizeof(ver);
    if (!GetVersionEx(&ver))
        return PyErr_SetFromWindowsErr(0);
    return Py_BuildValue("HHHHs",
                         ver.dwMajorVersion,
                         ver.dwMinorVersion,
                         ver.dwBuildNumber,
                         ver.dwPlatformId,
                         ver.szCSDVersion);
}

#endif /* MS_WINDOWS */

#ifdef HAVE_DLOPEN
static PyObject *
sys_setdlopenflags(PyObject *self, PyObject *args)
{
    int new_val;
        PyThreadState *tstate = PyThreadState_GET();
    if (!PyArg_ParseTuple(args, "i:setdlopenflags", &new_val))
        return NULL;
        if (!tstate)
        return NULL;
        tstate->interp->dlopenflags = new_val;
    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(setdlopenflags_doc,
"setdlopenflags(n) -> None\n\
\n\
Set the flags that will be used for dlopen() calls. Among other\n\
things, this will enable a lazy resolving of symbols when importing\n\
a module, if called as sys.setdlopenflags(0)\n\
To share symbols across extension modules, call as\n\
sys.setdlopenflags(dl.RTLD_NOW|dl.RTLD_GLOBAL)"
);

static PyObject *
sys_getdlopenflags(PyObject *self, PyObject *args)
{
        PyThreadState *tstate = PyThreadState_GET();
        if (!tstate)
        return NULL;
        return PyInt_FromLong(tstate->interp->dlopenflags);
}

PyDoc_STRVAR(getdlopenflags_doc,
"getdlopenflags() -> int\n\
\n\
Return the current value of the flags that are used for dlopen()\n\
calls. The flag constants are defined in the dl module."
);
#endif

#ifdef USE_MALLOPT
/* Link with -lmalloc (or -lmpc) on an SGI */
#include <malloc.h>

static PyObject *
sys_mdebug(PyObject *self, PyObject *args)
{
    int flag;
    if (!PyArg_ParseTuple(args, "i:mdebug", &flag))
        return NULL;
    mallopt(M_DEBUG, flag);
    Py_INCREF(Py_None);
    return Py_None;
}
#endif /* USE_MALLOPT */

static PyObject *
sys_getrefcount(PyObject *self, PyObject *arg)
{
    return PyInt_FromSsize_t(arg->ob_refcnt);
}

#ifdef Py_REF_DEBUG
static PyObject *
sys_gettotalrefcount(PyObject *self)
{
    return PyInt_FromSsize_t(_Py_GetRefTotal());
}
#endif /* Py_REF_DEBUG */

PyDoc_STRVAR(getrefcount_doc,
"getrefcount(object) -> integer\n\
\n\
Return the reference count of object.  The count returned is generally\n\
one higher than you might expect, because it includes the (temporary)\n\
reference as an argument to getrefcount()."
);

#ifdef COUNT_ALLOCS
static PyObject *
sys_getcounts(PyObject *self)
{
    extern PyObject *get_counts(void);

    return get_counts();
}
#endif

PyDoc_STRVAR(getframe_doc,
"_getframe([depth]) -> frameobject\n\
\n\
Return a frame object from the call stack.  If optional integer depth is\n\
given, return the frame object that many calls below the top of the stack.\n\
If that is deeper than the call stack, ValueError is raised.  The default\n\
for depth is zero, returning the frame at the top of the call stack.\n\
\n\
This function should be used for internal and specialized\n\
purposes only."
);

static PyObject *
sys_getframe(PyObject *self, PyObject *args)
{
    PyFrameObject *f = PyThreadState_GET()->frame;
    int depth = -1;

    if (!PyArg_ParseTuple(args, "|i:_getframe", &depth))
        return NULL;

    while (depth > 0 && f != NULL) {
        f = f->f_back;
        --depth;
    }
    if (f == NULL) {
        PyErr_SetString(PyExc_ValueError,
                "call stack is not deep enough");
        return NULL;
    }
    Py_INCREF(f);
    return (PyObject*)f;
}

PyDoc_STRVAR(current_frames_doc,
"_current_frames() -> dictionary\n\
\n\
Return a dictionary mapping each current thread T's thread id to T's\n\
current stack frame.\n\
\n\
This function should be used for specialized purposes only."
);

static PyObject *
sys_current_frames(PyObject *self, PyObject *noargs)
{
    return _PyThread_CurrentFrames();
}

PyDoc_STRVAR(call_tracing_doc,
"call_tracing(func, args) -> object\n\
\n\
Call func(*args), while tracing is enabled.  The tracing state is\n\
saved, and restored afterwards.  This is intended to be called from\n\
a debugger from a checkpoint, to recursively debug some other code."
);

static PyObject *
sys_call_tracing(PyObject *self, PyObject *args)
{
    PyObject *func, *funcargs;
    if (!PyArg_UnpackTuple(args, "call_tracing", 2, 2, &func, &funcargs))
        return NULL;
    return _PyEval_CallTracing(func, funcargs);
}

PyDoc_STRVAR(callstats_doc,
"callstats() -> tuple of integers\n\
\n\
Return a tuple of function call statistics, if CALL_PROFILE was defined\n\
when Python was built.  Otherwise, return None.\n\
\n\
When enabled, this function returns detailed, implementation-specific\n\
details about the number of function calls executed. The return value is\n\
a 11-tuple where the entries in the tuple are counts of:\n\
0. all function calls\n\
1. calls to PyFunction_Type objects\n\
2. PyFunction calls that do not create an argument tuple\n\
3. PyFunction calls that do not create an argument tuple\n\
   and bypass PyEval_EvalCodeEx()\n\
4. PyMethod calls\n\
5. PyMethod calls on bound methods\n\
6. PyType calls\n\
7. PyCFunction calls\n\
8. generator calls\n\
9. All other calls\n\
10. Number of stack pops performed by call_function()"
);

#ifdef __cplusplus
extern "C" {
#endif

#ifdef Py_TRACE_REFS
/* Defined in objects.c because it uses static globals if that file */
extern PyObject *_Py_GetObjects(PyObject *, PyObject *);
#endif

#ifdef DYNAMIC_EXECUTION_PROFILE
/* Defined in ceval.c because it uses static globals if that file */
extern PyObject *_Py_GetDXProfile(PyObject *,  PyObject *);
#endif
2011-01-06 10:07
wjphero
Rank: 1
等 级:新手上路
帖 子:5
专家分:0
注 册:2011-1-5
收藏
得分:0 
#ifdef __cplusplus
}
#endif

static PyMethodDef sys_methods[] = {
    /* Might as well keep this in alphabetic order */
    {"callstats", (PyCFunction)PyEval_GetCallStats, METH_NOARGS,
     callstats_doc},
    {"_current_frames", sys_current_frames, METH_NOARGS,
     current_frames_doc},
    {"displayhook",    sys_displayhook, METH_O, displayhook_doc},
    {"exc_info",    sys_exc_info, METH_NOARGS, exc_info_doc},
    {"exc_clear",    sys_exc_clear, METH_NOARGS, exc_clear_doc},
    {"excepthook",    sys_excepthook, METH_VARARGS, excepthook_doc},
    {"exit",    sys_exit, METH_VARARGS, exit_doc},
#ifdef Py_USING_UNICODE
    {"getdefaultencoding", (PyCFunction)sys_getdefaultencoding,
     METH_NOARGS, getdefaultencoding_doc},
#endif
#ifdef HAVE_DLOPEN
    {"getdlopenflags", (PyCFunction)sys_getdlopenflags, METH_NOARGS,
     getdlopenflags_doc},
#endif
#ifdef COUNT_ALLOCS
    {"getcounts",    (PyCFunction)sys_getcounts, METH_NOARGS},
#endif
#ifdef DYNAMIC_EXECUTION_PROFILE
    {"getdxp",    _Py_GetDXProfile, METH_VARARGS},
#endif
#ifdef Py_USING_UNICODE
    {"getfilesystemencoding", (PyCFunction)sys_getfilesystemencoding,
     METH_NOARGS, getfilesystemencoding_doc},
#endif
#ifdef Py_TRACE_REFS
    {"getobjects",    _Py_GetObjects, METH_VARARGS},
#endif
#ifdef Py_REF_DEBUG
    {"gettotalrefcount", (PyCFunction)sys_gettotalrefcount, METH_NOARGS},
#endif
    {"getrefcount",    (PyCFunction)sys_getrefcount, METH_O, getrefcount_doc},
    {"getrecursionlimit", (PyCFunction)sys_getrecursionlimit, METH_NOARGS,
     getrecursionlimit_doc},
    {"_getframe", sys_getframe, METH_VARARGS, getframe_doc},
#ifdef MS_WINDOWS
    {"getwindowsversion", (PyCFunction)sys_getwindowsversion, METH_NOARGS,
     getwindowsversion_doc},
#endif /* MS_WINDOWS */
#ifdef USE_MALLOPT
    {"mdebug",    sys_mdebug, METH_VARARGS},
#endif
#ifdef Py_USING_UNICODE
    {"setdefaultencoding", sys_setdefaultencoding, METH_VARARGS,
     setdefaultencoding_doc},
#endif
    {"setcheckinterval",    sys_setcheckinterval, METH_VARARGS,
     setcheckinterval_doc},
    {"getcheckinterval",    sys_getcheckinterval, METH_NOARGS,
     getcheckinterval_doc},
#ifdef HAVE_DLOPEN
    {"setdlopenflags", sys_setdlopenflags, METH_VARARGS,
     setdlopenflags_doc},
#endif
    {"setprofile",    sys_setprofile, METH_O, setprofile_doc},
    {"setrecursionlimit", sys_setrecursionlimit, METH_VARARGS,
     setrecursionlimit_doc},
#ifdef WITH_TSC
    {"settscdump", sys_settscdump, METH_VARARGS, settscdump_doc},
#endif
    {"settrace",    sys_settrace, METH_O, settrace_doc},
    {"call_tracing", sys_call_tracing, METH_VARARGS, call_tracing_doc},
    {NULL,        NULL}        /* sentinel */
};

static PyObject *
list_builtin_module_names(void)
{
    PyObject *list = PyList_New(0);
    int i;
    if (list == NULL)
        return NULL;
    for (i = 0; PyImport_Inittab[i].name != NULL; i++) {
        PyObject *name = PyString_FromString(
            PyImport_Inittab[i].name);
        if (name == NULL)
            break;
        PyList_Append(list, name);
        Py_DECREF(name);
    }
    if (PyList_Sort(list) != 0) {
        Py_DECREF(list);
        list = NULL;
    }
    if (list) {
        PyObject *v = PyList_AsTuple(list);
        Py_DECREF(list);
        list = v;
    }
    return list;
}

static PyObject *warnoptions = NULL;

void
PySys_ResetWarnOptions(void)
{
    if (warnoptions == NULL || !PyList_Check(warnoptions))
        return;
    PyList_SetSlice(warnoptions, 0, PyList_GET_SIZE(warnoptions), NULL);
}

void
PySys_AddWarnOption(char *s)
{
    PyObject *str;

    if (warnoptions == NULL || !PyList_Check(warnoptions)) {
        Py_XDECREF(warnoptions);
        warnoptions = PyList_New(0);
        if (warnoptions == NULL)
            return;
    }
    str = PyString_FromString(s);
    if (str != NULL) {
        PyList_Append(warnoptions, str);
        Py_DECREF(str);
    }
}

/* XXX This doc string is too long to be a single string literal in VC++ 5.0.
   Two literals concatenated works just fine.  If you have a K&R compiler
   or other abomination that however *does* understand longer strings,
   get rid of the !!! comment in the middle and the quotes that surround it. */
PyDoc_VAR(sys_doc) =
PyDoc_STR(
"This module provides access to some objects used or maintained by the\n\
interpreter and to functions that interact strongly with the interpreter.\n\
\n\
Dynamic objects:\n\
\n\
argv -- command line arguments; argv[0] is the script pathname if known\n\
path -- module search path; path[0] is the script directory, else ''\n\
modules -- dictionary of loaded modules\n\
\n\
displayhook -- called to show results in an interactive session\n\
excepthook -- called to handle any uncaught exception other than SystemExit\n\
  To customize printing in an interactive session or to install a custom\n\
  top-level exception handler, assign other functions to replace these.\n\
\n\
exitfunc -- if sys.exitfunc exists, this routine is called when Python exits\n\
  Assigning to sys.exitfunc is deprecated; use the atexit module instead.\n\
\n\
stdin -- standard input file object; used by raw_input() and input()\n\
stdout -- standard output file object; used by the print statement\n\
stderr -- standard error object; used for error messages\n\
  By assigning other file objects (or objects that behave like files)\n\
  to these, it is possible to redirect all of the interpreter's I/O.\n\
\n\
last_type -- type of last uncaught exception\n\
last_value -- value of last uncaught exception\n\
last_traceback -- traceback of last uncaught exception\n\
  These three are only available in an interactive session after a\n\
  traceback has been printed.\n\
\n\
exc_type -- type of exception currently being handled\n\
exc_value -- value of exception currently being handled\n\
exc_traceback -- traceback of exception currently being handled\n\
  The function exc_info() should be used instead of these three,\n\
  because it is thread-safe.\n\
"
)
/* concatenating string here */
PyDoc_STR(
"\n\
Static objects:\n\
\n\
maxint -- the largest supported integer (the smallest is -maxint-1)\n\
maxunicode -- the largest supported character\n\
builtin_module_names -- tuple of module names built into this interpreter\n\
version -- the version of this interpreter as a string\n\
version_info -- version information as a tuple\n\
hexversion -- version information encoded as a single integer\n\
copyright -- copyright notice pertaining to this interpreter\n\
platform -- platform identifier\n\
executable -- pathname of this Python interpreter\n\
prefix -- prefix used to find the Python library\n\
exec_prefix -- prefix used to find the machine-specific Python library\n\
"
)
#ifdef MS_WINDOWS
/* concatenating string here */
PyDoc_STR(
"dllhandle -- [Windows only] integer handle of the Python DLL\n\
winver -- [Windows only] version number of the Python DLL\n\
"
)
#endif /* MS_WINDOWS */
PyDoc_STR(
"__stdin__ -- the original stdin; don't touch!\n\
__stdout__ -- the original stdout; don't touch!\n\
__stderr__ -- the original stderr; don't touch!\n\
__displayhook__ -- the original displayhook; don't touch!\n\
__excepthook__ -- the original excepthook; don't touch!\n\
\n\
Functions:\n\
\n\
displayhook() -- print an object to the screen, and save it in __builtin__._\n\
excepthook() -- print an exception and its traceback to sys.stderr\n\
exc_info() -- return thread-safe information about the current exception\n\
exc_clear() -- clear the exception state for the current thread\n\
exit() -- exit the interpreter by raising SystemExit\n\
getdlopenflags() -- returns flags to be used for dlopen() calls\n\
getrefcount() -- return the reference count for an object (plus one :-)\n\
getrecursionlimit() -- return the max recursion depth for the interpreter\n\
setcheckinterval() -- control how often the interpreter checks for events\n\
setdlopenflags() -- set the flags to be used for dlopen() calls\n\
setprofile() -- set the global profiling function\n\
setrecursionlimit() -- set the max recursion depth for the interpreter\n\
settrace() -- set the global debug tracing function\n\
"
)
/* end of sys_doc */ ;

static int
_check_and_flush (FILE *stream)
{
  int prev_fail = ferror (stream);
  return fflush (stream) || prev_fail ? EOF : 0;
}

/* Subversion branch and revision management */
static const char _patchlevel_revision[] = PY_PATCHLEVEL_REVISION;
static const char headurl[] = "$HeadURL$";
static int svn_initialized;
static char patchlevel_revision[50]; /* Just the number */
static char branch[50];
static char shortbranch[50];
static const char *svn_revision;

static void
svnversion_init(void)
{
    const char *python, *br_start, *br_end, *br_end2, *svnversion;
    Py_ssize_t len;
    int istag;

    if (svn_initialized)
        return;

    python = strstr(headurl, "/python/");
    if (!python)
        Py_FatalError("subversion keywords missing");

    br_start = python + 8;
    br_end = strchr(br_start, '/');
    assert(br_end);

    /* Works even for trunk,
       as we are in trunk/Python/sysmodule.c */
    br_end2 = strchr(br_end+1, '/');

    istag = strncmp(br_start, "tags", 4) == 0;
    if (strncmp(br_start, "trunk", 5) == 0) {
        strcpy(branch, "trunk");
        strcpy(shortbranch, "trunk");

    }
    else if (istag || strncmp(br_start, "branches", 8) == 0) {
        len = br_end2 - br_start;
        strncpy(branch, br_start, len);
        branch[len] = '\0';

        len = br_end2 - (br_end + 1);
        strncpy(shortbranch, br_end + 1, len);
        shortbranch[len] = '\0';
    }
    else {
        Py_FatalError("bad HeadURL");
        return;
    }


    svnversion = _Py_svnversion();
    if (strcmp(svnversion, "exported") != 0)
        svn_revision = svnversion;
    else if (istag) {
        len = strlen(_patchlevel_revision);
        strncpy(patchlevel_revision, _patchlevel_revision + 11,
            len - 13);
        patchlevel_revision[len - 13] = '\0';
        svn_revision = patchlevel_revision;
    }
    else
        svn_revision = "";

    svn_initialized = 1;
}

/* Return svnversion output if available.
   Else return Revision of patchlevel.h if on branch.
   Else return empty string */
const char*
Py_SubversionRevision()
{
    svnversion_init();
    return svn_revision;
}

const char*
Py_SubversionShortBranch()
{
    svnversion_init();
    return shortbranch;
}

PyObject *
_PySys_Init(void)
{
    PyObject *m, *v, *sysdict;
    PyObject *sysin, *sysout, *syserr;
    char *s;
#ifdef MS_WINDOWS
    char buf[128];
#endif

    m = Py_InitModule3("sys", sys_methods, sys_doc);
    if (m == NULL)
        return NULL;
    sysdict = PyModule_GetDict(m);

    {
        /* XXX: does this work on Win/Win64? (see posix_fstat) */
        struct stat sb;
        if (fstat(fileno(stdin), &sb) == 0 &&
            S_ISDIR(sb.st_mode)) {
            /* There's nothing more we can do. */
            /* Py_FatalError() will core dump, so just exit. */
            PySys_WriteStderr("Python error: <stdin> is a directory, cannot continue\n");
            exit(EXIT_FAILURE);
        }
    }

    /* Closing the standard FILE* if sys.std* goes aways causes problems
     * for embedded Python usages. Closing them when somebody explicitly
     * invokes .close() might be possible, but the FAQ promises they get
     * never closed. However, we still need to get write errors when
     * writing fails (e.g. because stdout is redirected), so we flush the
     * streams and check for errors before the file objects are deleted.
     * On OS X, fflush()ing stdin causes an error, so we exempt stdin
     * from that procedure.
     */
    sysin = PyFile_FromFile(stdin, "<stdin>", "r", NULL);
    sysout = PyFile_FromFile(stdout, "<stdout>", "w", _check_and_flush);
    syserr = PyFile_FromFile(stderr, "<stderr>", "w", _check_and_flush);
    if (PyErr_Occurred())
        return NULL;
#ifdef MS_WINDOWS
    if(isatty(_fileno(stdin)) && PyFile_Check(sysin)) {
        sprintf(buf, "cp%d", GetConsoleCP());
        if (!PyFile_SetEncoding(sysin, buf))
            return NULL;
    }
    if(isatty(_fileno(stdout)) && PyFile_Check(sysout)) {
        sprintf(buf, "cp%d", GetConsoleOutputCP());
        if (!PyFile_SetEncoding(sysout, buf))
            return NULL;
    }
    if(isatty(_fileno(stderr)) && PyFile_Check(syserr)) {
        sprintf(buf, "cp%d", GetConsoleOutputCP());
        if (!PyFile_SetEncoding(syserr, buf))
            return NULL;
    }
#endif

    PyDict_SetItemString(sysdict, "stdin", sysin);
    PyDict_SetItemString(sysdict, "stdout", sysout);
    PyDict_SetItemString(sysdict, "stderr", syserr);
    /* Make backup copies for cleanup */
    PyDict_SetItemString(sysdict, "__stdin__", sysin);
    PyDict_SetItemString(sysdict, "__stdout__", sysout);
    PyDict_SetItemString(sysdict, "__stderr__", syserr);
    PyDict_SetItemString(sysdict, "__displayhook__",
                             PyDict_GetItemString(sysdict, "displayhook"));
    PyDict_SetItemString(sysdict, "__excepthook__",
                             PyDict_GetItemString(sysdict, "excepthook"));
    Py_XDECREF(sysin);
    Py_XDECREF(sysout);
    Py_XDECREF(syserr);
    PyDict_SetItemString(sysdict, "version",
                 v = PyString_FromString(Py_GetVersion()));
    Py_XDECREF(v);
    PyDict_SetItemString(sysdict, "hexversion",
                 v = PyInt_FromLong(PY_VERSION_HEX));
    Py_XDECREF(v);
    svnversion_init();
    v = Py_BuildValue("(ssz)", "CPython", branch, svn_revision);
    PyDict_SetItemString(sysdict, "subversion", v);
    Py_XDECREF(v);
    /*
     * These release level checks are mutually exclusive and cover
     * the field, so don't get too fancy with the pre-processor!
     */
#if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_ALPHA
    s = "alpha";
#elif PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_BETA
    s = "beta";
#elif PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_GAMMA
    s = "candidate";
#elif PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_FINAL
    s = "final";
#endif

#define SET_SYS_FROM_STRING(key, value)            \
    v = value;                    \
    if (v != NULL)                    \
        PyDict_SetItemString(sysdict, key, v);    \
    Py_XDECREF(v)

    SET_SYS_FROM_STRING("version_info",
                Py_BuildValue("iiisi", PY_MAJOR_VERSION,
                           PY_MINOR_VERSION,
                           PY_MICRO_VERSION, s,
                           PY_RELEASE_SERIAL));
    SET_SYS_FROM_STRING("api_version",
                PyInt_FromLong(PYTHON_API_VERSION));
    SET_SYS_FROM_STRING("copyright",
                PyString_FromString(Py_GetCopyright()));
    SET_SYS_FROM_STRING("platform",
                PyString_FromString(Py_GetPlatform()));
    SET_SYS_FROM_STRING("executable",
                PyString_FromString(Py_GetProgramFullPath()));
    SET_SYS_FROM_STRING("prefix",
                PyString_FromString(Py_GetPrefix()));
    SET_SYS_FROM_STRING("exec_prefix",
                   PyString_FromString(Py_GetExecPrefix()));
    SET_SYS_FROM_STRING("maxint",
                PyInt_FromLong(PyInt_GetMax()));
#ifdef Py_USING_UNICODE
    SET_SYS_FROM_STRING("maxunicode",
                PyInt_FromLong(PyUnicode_GetMax()));
#endif
    SET_SYS_FROM_STRING("builtin_module_names",
                list_builtin_module_names());
    {
        /* Assumes that longs are at least 2 bytes long.
           Should be safe! */
        unsigned long number = 1;
        char *value;

        s = (char *) &number;
        if (s[0] == 0)
            value = "big";
        else
            value = "little";
        SET_SYS_FROM_STRING("byteorder",
                    PyString_FromString(value));
    }
#ifdef MS_COREDLL
    SET_SYS_FROM_STRING("dllhandle",
                PyLong_FromVoidPtr(PyWin_DLLhModule));
    SET_SYS_FROM_STRING("winver",
                PyString_FromString(PyWin_DLLVersionString));
#endif
#undef SET_SYS_FROM_STRING
    if (warnoptions == NULL) {
        warnoptions = PyList_New(0);
    }
    else {
        Py_INCREF(warnoptions);
    }
    if (warnoptions != NULL) {
        PyDict_SetItemString(sysdict, "warnoptions", warnoptions);
    }

    if (PyErr_Occurred())
        return NULL;
    return m;
}

static PyObject *
makepathobject(char *path, int delim)
{
    int i, n;
    char *p;
    PyObject *v, *w;

    n = 1;
    p = path;
    while ((p = strchr(p, delim)) != NULL) {
        n++;
        p++;
    }
    v = PyList_New(n);
    if (v == NULL)
        return NULL;
    for (i = 0; ; i++) {
        p = strchr(path, delim);
        if (p == NULL)
            p = strchr(path, '\0'); /* End of string */
        w = PyString_FromStringAndSize(path, (Py_ssize_t) (p - path));
        if (w == NULL) {
            Py_DECREF(v);
            return NULL;
        }
        PyList_SetItem(v, i, w);
        if (*p == '\0')
            break;
        path = p+1;
    }
    return v;
}

void
PySys_SetPath(char *path)
{
    PyObject *v;
    if ((v = makepathobject(path, DELIM)) == NULL)
        Py_FatalError("can't create sys.path");
    if (PySys_SetObject("path", v) != 0)
        Py_FatalError("can't assign sys.path");
    Py_DECREF(v);
}

static PyObject *
makeargvobject(int argc, char **argv)
{
    PyObject *av;
    if (argc <= 0 || argv == NULL) {
        /* Ensure at least one (empty) argument is seen */
        static char *empty_argv[1] = {""};
        argv = empty_argv;
        argc = 1;
    }
    av = PyList_New(argc);
    if (av != NULL) {
        int i;
        for (i = 0; i < argc; i++) {
#ifdef __VMS
            PyObject *v;

            /* argv[0] is the script pathname if known */
            if (i == 0) {
                char* fn = decc$translate_vms(argv[0]);
                if ((fn == (char *)0) || fn == (char *)-1)
                    v = PyString_FromString(argv[0]);
                else
                    v = PyString_FromString(
                        decc$translate_vms(argv[0]));
            } else
                v = PyString_FromString(argv[i]);
#else
            PyObject *v = PyString_FromString(argv[i]);
#endif
            if (v == NULL) {
                Py_DECREF(av);
                av = NULL;
                break;
            }
            PyList_SetItem(av, i, v);
        }
    }
    return av;
}

void
PySys_SetArgv(int argc, char **argv)
{
#if defined(HAVE_REALPATH)
    char fullpath[MAXPATHLEN];
#elif defined(MS_WINDOWS)
    char fullpath[MAX_PATH];
#endif
    PyObject *av = makeargvobject(argc, argv);
    PyObject *path = PySys_GetObject("path");
    if (av == NULL)
        Py_FatalError("no mem for sys.argv");
    if (PySys_SetObject("argv", av) != 0)
        Py_FatalError("can't assign sys.argv");
    if (path != NULL) {
        char *argv0 = argv[0];
        char *p = NULL;
        Py_ssize_t n = 0;
        PyObject *a;
#ifdef HAVE_READLINK
        char link[MAXPATHLEN+1];
        char argv0copy[2*MAXPATHLEN+1];
        int nr = 0;
        if (argc > 0 && argv0 != NULL && strcmp(argv0, "-c") != 0)
            nr = readlink(argv0, link, MAXPATHLEN);
        if (nr > 0) {
            /* It's a symlink */
            link[nr] = '\0';
            if (link[0] == SEP)
                argv0 = link; /* Link to absolute path */
            else if (strchr(link, SEP) == NULL)
                ; /* Link without path */
            else {
                /* Must join(dirname(argv0), link) */
                char *q = strrchr(argv0, SEP);
                if (q == NULL)
                    argv0 = link; /* argv0 without path */
                else {
                    /* Must make a copy */
                    strcpy(argv0copy, argv0);
                    q = strrchr(argv0copy, SEP);
                    strcpy(q+1, link);
                    argv0 = argv0copy;
                }
            }
        }
#endif /* HAVE_READLINK */
#if SEP == '\\' /* Special case for MS filename syntax */
        if (argc > 0 && argv0 != NULL && strcmp(argv0, "-c") != 0) {
            char *q;
#ifdef MS_WINDOWS
            char *ptemp;
            if (GetFullPathName(argv0,
                       sizeof(fullpath),
                       fullpath,
                       &ptemp)) {
                argv0 = fullpath;
            }
#endif
            p = strrchr(argv0, SEP);
            /* Test for alternate separator */
            q = strrchr(p ? p : argv0, '/');
            if (q != NULL)
                p = q;
            if (p != NULL) {
                n = p + 1 - argv0;
                if (n > 1 && p[-1] != ':')
                    n--; /* Drop trailing separator */
            }
        }
#else /* All other filename syntaxes */
        if (argc > 0 && argv0 != NULL && strcmp(argv0, "-c") != 0) {
#if defined(HAVE_REALPATH)
            if (realpath(argv0, fullpath)) {
                argv0 = fullpath;
            }
#endif
            p = strrchr(argv0, SEP);
        }
        if (p != NULL) {
#ifndef RISCOS
            n = p + 1 - argv0;
#else /* don't include trailing separator */
            n = p - argv0;
#endif /* RISCOS */
#if SEP == '/' /* Special case for Unix filename syntax */
            if (n > 1)
                n--; /* Drop trailing separator */
#endif /* Unix */
        }
#endif /* All others */
        a = PyString_FromStringAndSize(argv0, n);
        if (a == NULL)
            Py_FatalError("no mem for sys.path insertion");
        if (PyList_Insert(path, 0, a) < 0)
            Py_FatalError("sys.path.insert(0) failed");
        Py_DECREF(a);
    }
    Py_DECREF(av);
}


/* APIs to write to sys.stdout or sys.stderr using a printf-like interface.
   Adapted from code submitted by Just van Rossum.

   PySys_WriteStdout(format, ...)
   PySys_WriteStderr(format, ...)

      The first function writes to sys.stdout; the second to sys.stderr.  When
      there is a problem, they write to the real (C level) stdout or stderr;
      no exceptions are raised.

      Both take a printf-style format string as their first argument followed
      by a variable length argument list determined by the format string.

      *** WARNING ***

      The format should limit the total size of the formatted output string to
      1000 bytes.  In particular, this means that no unrestricted "%s" formats
      should occur; these should be limited using "%.<N>s where <N> is a
      decimal number calculated so that <N> plus the maximum size of other
      formatted text does not exceed 1000 bytes.  Also watch out for "%f",
      which can print hundreds of digits for very large numbers.

 */

static void
mywrite(char *name, FILE *fp, const char *format, va_list va)
{
    PyObject *file;
    PyObject *error_type, *error_value, *error_traceback;

    PyErr_Fetch(&error_type, &error_value, &error_traceback);
    file = PySys_GetObject(name);
    if (file == NULL || PyFile_AsFile(file) == fp)
        vfprintf(fp, format, va);
    else {
        char buffer[1001];
        const int written = PyOS_vsnprintf(buffer, sizeof(buffer),
                           format, va);
        if (PyFile_WriteString(buffer, file) != 0) {
            PyErr_Clear();
            fputs(buffer, fp);
        }
        if (written < 0 || (size_t)written >= sizeof(buffer)) {
            const char *truncated = "... truncated";
            if (PyFile_WriteString(truncated, file) != 0) {
                PyErr_Clear();
                fputs(truncated, fp);
            }
        }
    }
    PyErr_Restore(error_type, error_value, error_traceback);
}

void
PySys_WriteStdout(const char *format, ...)
{
    va_list va;

    va_start(va, format);
    mywrite("stdout", stdout, format, va);
    va_end(va);
}

void
PySys_WriteStderr(const char *format, ...)
{
    va_list va;

    va_start(va, format);
    mywrite("stderr", stderr, format, va);
    va_end(va);
}
2011-01-06 10:08
wjphero
Rank: 1
等 级:新手上路
帖 子:5
专家分:0
注 册:2011-1-5
收藏
得分:0 
sys模块对外没有.py文件,它是内置于解释器中的,上面的代码是sys模块的源代码(c语言)。因为sys模块是整个python的基础,因此不要进行轻易的修改。
2011-01-06 10:11
lampeter123
Rank: 16Rank: 16Rank: 16Rank: 16
等 级:版主
威 望:54
帖 子:2508
专家分:6424
注 册:2009-1-30
收藏
得分:0 
记得曾经看过一本书《PYTHON源码剖析》,C语言基础可以读一下。

你的优秀和我的人生无关!!!!
    
    我要过的,是属于我自己的生活~~~
2011-01-06 14:06
jsliuqun
Rank: 1
等 级:新手上路
帖 子:5
专家分:0
注 册:2017-1-3
收藏
得分:0 
回复 3楼 wjphero
请问你贴的这个文件在哪里,怎么打开?
谢谢
2017-01-03 20:38
jsliuqun
Rank: 1
等 级:新手上路
帖 子:5
专家分:0
注 册:2017-1-3
收藏
得分:0 
回复 3楼 wjphero
请问你贴的这个文件在哪里,怎么打开?
谢谢
2017-01-03 20:38
jsliuqun
Rank: 1
等 级:新手上路
帖 子:5
专家分:0
注 册:2017-1-3
收藏
得分:0 
回复 5楼 wjphero
我是python菜鸟,最近才学习GAN.网上下载的代码里几乎都报错:AttributeError: 'module' object has no attribute 'getdlopenflags'
查了是说sys的 getdlopenflags属性只支持unix,可是我的是windows,不会UNIX.....
看到您贴的C语言的sys文件,里面有这个属性.
所以想顺便问下你,有没有可能自己手动更改sys.py把这个属性给加上去呢?
问题比较弱智,希望能得到您的指点.感谢!
2017-01-03 20:44
快速回复:求助,关于sys模块文件在哪个文件中
数据加载中...
 
   



关于我们 | 广告合作 | 编程中国 | 清除Cookies | TOP | 手机版

编程中国 版权所有,并保留所有权利。
Powered by Discuz, Processed in 0.019180 second(s), 7 queries.
Copyright©2004-2024, BCCN.NET, All Rights Reserved