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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>作業系統工具 — Python 3.7.0 說明文件</title>

title="在 Python 3.7.0 說明文件中搜尋"

href="../_static/opensearch.xml"/>

</head><body>

<ul>

<a href="../genindex.html" title="General Index"

accesskey="I">索引</a></li>

<a href="../py-modindex.html" title="Python 模組索引"

>模組</a> |</li>

<a href="import.html" title="匯入模組"

accesskey="N">下一頁</a> |</li>

<a href="utilities.html" title="工具"

accesskey="P">上一頁</a> |</li>

<li><img src="../_static/py.png" alt=""

style="vertical-align: middle; margin-top: -1px"/></li>

<li><a href="https://www.python.org/">Python</a> »</li>

<li>

zh_TW

3.7.0

<a href="../index.html">Documentation </a> »

</li>

<li class="nav-item nav-item-1"><a href="index.html" >Python / C API 參考手冊</a> »</li>

</form>

</div>

</li>

</ul>

</div>

<h1>作業系統工具<a class="headerlink" href="#operating-system-utilities" title="本標題的永久連結">¶</a></h1>

<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyOS_FSPath</code>(<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a> *path)<a class="headerlink" href="#c.PyOS_FSPath" title="本定義的永久連結">¶</a></dt>

<dd>Return value: New reference.Return the file system representation for path. If the object is a

incremented. If the object implements the <a class="reference internal" href="../library/os.html#os.PathLike" title="os.PathLike"><code class="xref py py-class docutils literal notranslate">os.PathLike</code></a> interface,

then <a class="reference internal" href="../library/os.html#os.PathLike.__fspath__" title="os.PathLike.__fspath__"><code class="xref py py-meth docutils literal notranslate">__fspath__()</code></a> is returned as long as it is a

<a class="reference internal" href="../library/stdtypes.html#str" title="str"><code class="xref py py-class docutils literal notranslate">str</code></a> or <a class="reference internal" href="../library/stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate">bytes</code></a> object. Otherwise <a class="reference internal" href="../library/exceptions.html#TypeError" title="TypeError"><code class="xref py py-exc docutils literal notranslate">TypeError</code></a> is raised

and <code class="docutils literal notranslate">NULL</code> is returned.

3.6 版新加入.

</div>

</dd></dl>

int <code class="descname">Py_FdIsInteractive</code>(FILE *fp, const char *filename)<a class="headerlink" href="#c.Py_FdIsInteractive" title="本定義的永久連結">¶</a></dt>

<dd>Return true (nonzero) if the standard I/O file fp with name filename is

deemed interactive. This is the case for files for which <code class="docutils literal notranslate">isatty(fileno(fp))</code>

is true. If the global flag <a class="reference internal" href="init.html#c.Py_InteractiveFlag" title="Py_InteractiveFlag"><code class="xref c c-data docutils literal notranslate">Py_InteractiveFlag</code></a> is true, this function

also returns true if the filename pointer is NULL or if the name is equal to

one of the strings <code class="docutils literal notranslate">'<stdin>'</code> or <code class="docutils literal notranslate">'???'</code>.

</dd></dl>

void <code class="descname">PyOS_BeforeFork</code>()<a class="headerlink" href="#c.PyOS_BeforeFork" title="本定義的永久連結">¶</a></dt>

<dd>Function to prepare some internal state before a process fork. This

should be called before calling <code class="xref c c-func docutils literal notranslate">fork()</code> or any similar function

that clones the current process.

Only available on systems where <code class="xref c c-func docutils literal notranslate">fork()</code> is defined.

3.7 版新加入.

</div>

</dd></dl>

void <code class="descname">PyOS_AfterFork_Parent</code>()<a class="headerlink" href="#c.PyOS_AfterFork_Parent" title="本定義的永久連結">¶</a></dt>

<dd>Function to update some internal state after a process fork. This

should be called from the parent process after calling <code class="xref c c-func docutils literal notranslate">fork()</code>

or any similar function that clones the current process, regardless

of whether process cloning was successful.

Only available on systems where <code class="xref c c-func docutils literal notranslate">fork()</code> is defined.

3.7 版新加入.

</div>

</dd></dl>

void <code class="descname">PyOS_AfterFork_Child</code>()<a class="headerlink" href="#c.PyOS_AfterFork_Child" title="本定義的永久連結">¶</a></dt>

<dd>Function to update internal interpreter state after a process fork.

This must be called from the child process after calling <code class="xref c c-func docutils literal notranslate">fork()</code>,

or any similar function that clones the current process, if there is

any chance the process will call back into the Python interpreter.

Only available on systems where <code class="xref c c-func docutils literal notranslate">fork()</code> is defined.

3.7 版新加入.

</div>

也參考

<a class="reference internal" href="../library/os.html#os.register_at_fork" title="os.register_at_fork"><code class="xref py py-func docutils literal notranslate">os.register_at_fork()</code></a> allows registering custom Python functions

to be called by <a class="reference internal" href="#c.PyOS_BeforeFork" title="PyOS_BeforeFork"><code class="xref c c-func docutils literal notranslate">PyOS_BeforeFork()</code></a>,

<a class="reference internal" href="#c.PyOS_AfterFork_Parent" title="PyOS_AfterFork_Parent"><code class="xref c c-func docutils literal notranslate">PyOS_AfterFork_Parent()</code></a> and <a class="reference internal" href="#c.PyOS_AfterFork_Child" title="PyOS_AfterFork_Child"><code class="xref c c-func docutils literal notranslate">PyOS_AfterFork_Child()</code></a>.

</div>

</dd></dl>

void <code class="descname">PyOS_AfterFork</code>()<a class="headerlink" href="#c.PyOS_AfterFork" title="本定義的永久連結">¶</a></dt>

<dd>Function to update some internal state after a process fork; this should be

called in the new process if the Python interpreter will continue to be used.

If a new executable is loaded into the new process, this function does not need

to be called.

3.7 版後已棄用: This function is superseded by <a class="reference internal" href="#c.PyOS_AfterFork_Child" title="PyOS_AfterFork_Child"><code class="xref c c-func docutils literal notranslate">PyOS_AfterFork_Child()</code></a>.

</div>

</dd></dl>

int <code class="descname">PyOS_CheckStack</code>()<a class="headerlink" href="#c.PyOS_CheckStack" title="本定義的永久連結">¶</a></dt>

<dd>Return true when the interpreter runs out of stack space. This is a reliable

check, but is only available when <code class="xref py py-const docutils literal notranslate">USE_STACKCHECK</code> is defined (currently

on Windows using the Microsoft Visual C++ compiler). <code class="xref py py-const docutils literal notranslate">USE_STACKCHECK</code>

will be defined automatically; you should never change the definition in your

own code.

</dd></dl>

PyOS_sighandler_t <code class="descname">PyOS_getsig</code>(int i)<a class="headerlink" href="#c.PyOS_getsig" title="本定義的永久連結">¶</a></dt>

<dd>Return the current signal handler for signal i. This is a thin wrapper around

either <code class="xref c c-func docutils literal notranslate">sigaction()</code> or <code class="xref c c-func docutils literal notranslate">signal()</code>. Do not call those functions

directly! <code class="xref c c-type docutils literal notranslate">PyOS_sighandler_t</code> is a typedef alias for <code class="xref c c-type docutils literal notranslate">void

(*)(int)</code>.

</dd></dl>

PyOS_sighandler_t <code class="descname">PyOS_setsig</code>(int i, PyOS_sighandler_t h)<a class="headerlink" href="#c.PyOS_setsig" title="本定義的永久連結">¶</a></dt>

<dd>Set the signal handler for signal i to be h; return the old signal handler.

This is a thin wrapper around either <code class="xref c c-func docutils literal notranslate">sigaction()</code> or <code class="xref c c-func docutils literal notranslate">signal()</code>. Do

not call those functions directly! <code class="xref c c-type docutils literal notranslate">PyOS_sighandler_t</code> is a typedef

alias for <code class="xref c c-type docutils literal notranslate">void (*)(int)</code>.

</dd></dl>

wchar_t* <code class="descname">Py_DecodeLocale</code>(const char* arg, size_t *size)<a class="headerlink" href="#c.Py_DecodeLocale" title="本定義的永久連結">¶</a></dt>

<dd>Decode a byte string from the locale encoding with the <a class="reference internal" href="../library/codecs.html#surrogateescape">surrogateescape

error handler</a>: undecodable bytes are decoded as

characters in range U+DC80..U+DCFF. If a byte sequence can be decoded as a

surrogate character, escape the bytes using the surrogateescape error

handler instead of decoding them.

Encoding, highest priority to lowest priority:

<li><code class="docutils literal notranslate">UTF-8</code> on macOS and Android;</li>

<li><code class="docutils literal notranslate">UTF-8</code> if the Python UTF-8 mode is enabled;</li>

<li><code class="docutils literal notranslate">ASCII</code> if the <code class="docutils literal notranslate">LC_CTYPE</code> locale is <code class="docutils literal notranslate">"C"</code>,

<code class="docutils literal notranslate">nl_langinfo(CODESET)</code> returns the <code class="docutils literal notranslate">ASCII</code> encoding (or an alias),

and <code class="xref c c-func docutils literal notranslate">mbstowcs()</code> and <code class="xref c c-func docutils literal notranslate">wcstombs()</code> functions uses the

<code class="docutils literal notranslate">ISO-8859-1</code> encoding.</li>

<li>the current locale encoding.</li>

</ul>

Return a pointer to a newly allocated wide character string, use

<a class="reference internal" href="memory.html#c.PyMem_RawFree" title="PyMem_RawFree"><code class="xref c c-func docutils literal notranslate">PyMem_RawFree()</code></a> to free the memory. If size is not <code class="docutils literal notranslate">NULL</code>, write

the number of wide characters excluding the null character into <code class="docutils literal notranslate">*size</code>

Return <code class="docutils literal notranslate">NULL</code> on decoding error or memory allocation error. If size is

not <code class="docutils literal notranslate">NULL</code>, <code class="docutils literal notranslate">*size</code> is set to <code class="docutils literal notranslate">(size_t)-1</code> on memory error or set to

<code class="docutils literal notranslate">(size_t)-2</code> on decoding error.

Decoding errors should never happen, unless there is a bug in the C

library.

Use the <a class="reference internal" href="#c.Py_EncodeLocale" title="Py_EncodeLocale"><code class="xref c c-func docutils literal notranslate">Py_EncodeLocale()</code></a> function to encode the character string

back to a byte string.

也參考

The <a class="reference internal" href="unicode.html#c.PyUnicode_DecodeFSDefaultAndSize" title="PyUnicode_DecodeFSDefaultAndSize"><code class="xref c c-func docutils literal notranslate">PyUnicode_DecodeFSDefaultAndSize()</code></a> and

<a class="reference internal" href="unicode.html#c.PyUnicode_DecodeLocaleAndSize" title="PyUnicode_DecodeLocaleAndSize"><code class="xref c c-func docutils literal notranslate">PyUnicode_DecodeLocaleAndSize()</code></a> functions.

</div>

3.5 版新加入.

</div>

3.7 版更變: The function now uses the UTF-8 encoding in the UTF-8 mode.

</div>

</dd></dl>

char* <code class="descname">Py_EncodeLocale</code>(const wchar_t *text, size_t *error_pos)<a class="headerlink" href="#c.Py_EncodeLocale" title="本定義的永久連結">¶</a></dt>

<dd>Encode a wide character string to the locale encoding with the

<a class="reference internal" href="../library/codecs.html#surrogateescape">surrogateescape error handler</a>: surrogate characters

in the range U+DC80..U+DCFF are converted to bytes 0x80..0xFF.

Encoding, highest priority to lowest priority:

<li><code class="docutils literal notranslate">UTF-8</code> on macOS and Android;</li>

<li><code class="docutils literal notranslate">UTF-8</code> if the Python UTF-8 mode is enabled;</li>

<code class="docutils literal notranslate">ISO-8859-1</code> encoding.</li>

<li>the current locale encoding.</li>

</ul>

The function uses the UTF-8 encoding in the Python UTF-8 mode.

Return a pointer to a newly allocated byte string, use <a class="reference internal" href="memory.html#c.PyMem_Free" title="PyMem_Free"><code class="xref c c-func docutils literal notranslate">PyMem_Free()</code></a>

to free the memory. Return <code class="docutils literal notranslate">NULL</code> on encoding error or memory allocation

error

If error_pos is not <code class="docutils literal notranslate">NULL</code>, <code class="docutils literal notranslate">*error_pos</code> is set to <code class="docutils literal notranslate">(size_t)-1</code> on

success, or set to the index of the invalid character on encoding error.

Use the <a class="reference internal" href="#c.Py_DecodeLocale" title="Py_DecodeLocale"><code class="xref c c-func docutils literal notranslate">Py_DecodeLocale()</code></a> function to decode the bytes string back

to a wide character string.

3.7 版更變: The function now uses the UTF-8 encoding in the UTF-8 mode.

</div>

也參考

The <a class="reference internal" href="unicode.html#c.PyUnicode_EncodeFSDefault" title="PyUnicode_EncodeFSDefault"><code class="xref c c-func docutils literal notranslate">PyUnicode_EncodeFSDefault()</code></a> and

<a class="reference internal" href="unicode.html#c.PyUnicode_EncodeLocale" title="PyUnicode_EncodeLocale"><code class="xref c c-func docutils literal notranslate">PyUnicode_EncodeLocale()</code></a> functions.

</div>

3.5 版新加入.

</div>

3.7 版更變: The function now supports the UTF-8 mode.

</div>

</dd></dl>

</div>

These are utility functions that make functionality from the <a class="reference internal" href="../library/sys.html#module-sys" title="sys: Access system-specific parameters and functions."><code class="xref py py-mod docutils literal notranslate">sys</code></a> module

accessible to C code. They all work with the current interpreter thread’s

<a class="reference internal" href="../library/sys.html#module-sys" title="sys: Access system-specific parameters and functions."><code class="xref py py-mod docutils literal notranslate">sys</code></a> module’s dict, which is contained in the internal thread state structure.

<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a> *<code class="descname">PySys_GetObject</code>(const char *name)<a class="headerlink" href="#c.PySys_GetObject" title="本定義的永久連結">¶</a></dt>

<dd>Return value: Borrowed reference.Return the object name from the <a class="reference internal" href="../library/sys.html#module-sys" title="sys: Access system-specific parameters and functions."><code class="xref py py-mod docutils literal notranslate">sys</code></a> module or NULL if it does

not exist, without setting an exception.

</dd></dl>

int <code class="descname">PySys_SetObject</code>(const char *name, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a> *v)<a class="headerlink" href="#c.PySys_SetObject" title="本定義的永久連結">¶</a></dt>

<dd>Set name in the <a class="reference internal" href="../library/sys.html#module-sys" title="sys: Access system-specific parameters and functions."><code class="xref py py-mod docutils literal notranslate">sys</code></a> module to v unless v is NULL, in which

case name is deleted from the sys module. Returns <code class="docutils literal notranslate">0</code> on success, <code class="docutils literal notranslate">-1</code>

on error.

</dd></dl>

void <code class="descname">PySys_ResetWarnOptions</code>()<a class="headerlink" href="#c.PySys_ResetWarnOptions" title="本定義的永久連結">¶</a></dt>

<dd>Reset <a class="reference internal" href="../library/sys.html#sys.warnoptions" title="sys.warnoptions"><code class="xref py py-data docutils literal notranslate">sys.warnoptions</code></a> to an empty list. This function may be

called prior to <a class="reference internal" href="init.html#c.Py_Initialize" title="Py_Initialize"><code class="xref c c-func docutils literal notranslate">Py_Initialize()</code></a>.

</dd></dl>

void <code class="descname">PySys_AddWarnOption</code>(const wchar_t *s)<a class="headerlink" href="#c.PySys_AddWarnOption" title="本定義的永久連結">¶</a></dt>

<dd>Append s to <a class="reference internal" href="../library/sys.html#sys.warnoptions" title="sys.warnoptions"><code class="xref py py-data docutils literal notranslate">sys.warnoptions</code></a>. This function must be called prior

to <a class="reference internal" href="init.html#c.Py_Initialize" title="Py_Initialize"><code class="xref c c-func docutils literal notranslate">Py_Initialize()</code></a> in order to affect the warnings filter list.

</dd></dl>

void <code class="descname">PySys_AddWarnOptionUnicode</code>(<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a> *unicode)<a class="headerlink" href="#c.PySys_AddWarnOptionUnicode" title="本定義的永久連結">¶</a></dt>

<dd>Append unicode to <a class="reference internal" href="../library/sys.html#sys.warnoptions" title="sys.warnoptions"><code class="xref py py-data docutils literal notranslate">sys.warnoptions</code></a>.

Note: this function is not currently usable from outside the CPython

implementation, as it must be called prior to the implicit import of

<a class="reference internal" href="../library/warnings.html#module-warnings" title="warnings: Issue warning messages and control their disposition."><code class="xref py py-mod docutils literal notranslate">warnings</code></a> in <a class="reference internal" href="init.html#c.Py_Initialize" title="Py_Initialize"><code class="xref c c-func docutils literal notranslate">Py_Initialize()</code></a> to be effective, but can’t be

called until enough of the runtime has been initialized to permit the

creation of Unicode objects.

</dd></dl>

void <code class="descname">PySys_SetPath</code>(const wchar_t *path)<a class="headerlink" href="#c.PySys_SetPath" title="本定義的永久連結">¶</a></dt>

<dd>Set <a class="reference internal" href="../library/sys.html#sys.path" title="sys.path"><code class="xref py py-data docutils literal notranslate">sys.path</code></a> to a list object of paths found in path which should

be a list of paths separated with the platform’s search path delimiter

(<code class="docutils literal notranslate">:</code> on Unix, <code class="docutils literal notranslate">;</code> on Windows).

</dd></dl>

void <code class="descname">PySys_WriteStdout</code>(const char *format, ...)<a class="headerlink" href="#c.PySys_WriteStdout" title="本定義的永久連結">¶</a></dt>

<dd>Write the output string described by format to <a class="reference internal" href="../library/sys.html#sys.stdout" title="sys.stdout"><code class="xref py py-data docutils literal notranslate">sys.stdout</code></a>. No

exceptions are raised, even if truncation occurs (see below).

format should limit the total size of the formatted output string to

1000 bytes or less – after 1000 bytes, the output string is truncated.

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.

If a problem occurs, or <a class="reference internal" href="../library/sys.html#sys.stdout" title="sys.stdout"><code class="xref py py-data docutils literal notranslate">sys.stdout</code></a> is unset, the formatted message

is written to the real (C level) stdout.

</dd></dl>

void <code class="descname">PySys_WriteStderr</code>(const char *format, ...)<a class="headerlink" href="#c.PySys_WriteStderr" title="本定義的永久連結">¶</a></dt>

<dd>As <a class="reference internal" href="#c.PySys_WriteStdout" title="PySys_WriteStdout"><code class="xref c c-func docutils literal notranslate">PySys_WriteStdout()</code></a>, but write to <a class="reference internal" href="../library/sys.html#sys.stderr" title="sys.stderr"><code class="xref py py-data docutils literal notranslate">sys.stderr</code></a> or stderr

instead.

</dd></dl>

void <code class="descname">PySys_FormatStdout</code>(const char *format, ...)<a class="headerlink" href="#c.PySys_FormatStdout" title="本定義的永久連結">¶</a></dt>

<dd>Function similar to PySys_WriteStdout() but format the message using

<a class="reference internal" href="unicode.html#c.PyUnicode_FromFormatV" title="PyUnicode_FromFormatV"><code class="xref c c-func docutils literal notranslate">PyUnicode_FromFormatV()</code></a> and don’t truncate the message to an

arbitrary length.

3.2 版新加入.

</div>

</dd></dl>

void <code class="descname">PySys_FormatStderr</code>(const char *format, ...)<a class="headerlink" href="#c.PySys_FormatStderr" title="本定義的永久連結">¶</a></dt>

<dd>As <a class="reference internal" href="#c.PySys_FormatStdout" title="PySys_FormatStdout"><code class="xref c c-func docutils literal notranslate">PySys_FormatStdout()</code></a>, but write to <a class="reference internal" href="../library/sys.html#sys.stderr" title="sys.stderr"><code class="xref py py-data docutils literal notranslate">sys.stderr</code></a> or stderr

instead.

3.2 版新加入.

</div>

</dd></dl>

void <code class="descname">PySys_AddXOption</code>(const wchar_t *s)<a class="headerlink" href="#c.PySys_AddXOption" title="本定義的永久連結">¶</a></dt>

<dd>Parse s as a set of <a class="reference internal" href="../using/cmdline.html#id5"><code class="xref std std-option docutils literal notranslate">-X</code></a> options and add them to the current

options mapping as returned by <a class="reference internal" href="#c.PySys_GetXOptions" title="PySys_GetXOptions"><code class="xref c c-func docutils literal notranslate">PySys_GetXOptions()</code></a>. This function

may be called prior to <a class="reference internal" href="init.html#c.Py_Initialize" title="Py_Initialize"><code class="xref c c-func docutils literal notranslate">Py_Initialize()</code></a>.

3.2 版新加入.

</div>

</dd></dl>

<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a> *<code class="descname">PySys_GetXOptions</code>()<a class="headerlink" href="#c.PySys_GetXOptions" title="本定義的永久連結">¶</a></dt>

<dd>Return value: Borrowed reference.Return the current dictionary of <a class="reference internal" href="../using/cmdline.html#id5"><code class="xref std std-option docutils literal notranslate">-X</code></a> options, similarly to

<a class="reference internal" href="../library/sys.html#sys._xoptions" title="sys._xoptions"><code class="xref py py-data docutils literal notranslate">sys._xoptions</code></a>. On error, NULL is returned and an exception is

set.

3.2 版新加入.

</div>

</dd></dl>

</div>

<h1>行程（Process）控制<a class="headerlink" href="#process-control" title="本標題的永久連結">¶</a></h1>

void <code class="descname">Py_FatalError</code>(const char *message)<a class="headerlink" href="#c.Py_FatalError" title="本定義的永久連結">¶</a></dt>

<dd>Print a fatal error message and kill the process. No cleanup is performed.

This function should only be invoked when a condition is detected that would

make it dangerous to continue using the Python interpreter; e.g., when the

object administration appears to be corrupted. On Unix, the standard C library

function <code class="xref c c-func docutils literal notranslate">abort()</code> is called which will attempt to produce a <code class="file docutils literal notranslate">core</code>

file.

</dd></dl>

void <code class="descname">Py_Exit</code>(int status)<a class="headerlink" href="#c.Py_Exit" title="本定義的永久連結">¶</a></dt>

<dd>Exit the current process. This calls <a class="reference internal" href="init.html#c.Py_FinalizeEx" title="Py_FinalizeEx"><code class="xref c c-func docutils literal notranslate">Py_FinalizeEx()</code></a> and then calls the

standard C library function <code class="docutils literal notranslate">exit(status)</code>. If <a class="reference internal" href="init.html#c.Py_FinalizeEx" title="Py_FinalizeEx"><code class="xref c c-func docutils literal notranslate">Py_FinalizeEx()</code></a>

indicates an error, the exit status is set to 120.

3.6 版更變: Errors from finalization no longer ignored.

</div>

</dd></dl>

int <code class="descname">Py_AtExit</code>(void (*func)())<a class="headerlink" href="#c.Py_AtExit" title="本定義的永久連結">¶</a></dt>

<dd>Register a cleanup function to be called by <a class="reference internal" href="init.html#c.Py_FinalizeEx" title="Py_FinalizeEx"><code class="xref c c-func docutils literal notranslate">Py_FinalizeEx()</code></a>. The cleanup

function will be called with no arguments and should return no value. At most

32 cleanup functions can be registered. When the registration is successful,

<a class="reference internal" href="#c.Py_AtExit" title="Py_AtExit"><code class="xref c c-func docutils literal notranslate">Py_AtExit()</code></a> returns <code class="docutils literal notranslate">0</code>; on failure, it returns <code class="docutils literal notranslate">-1</code>. The cleanup

function registered last is called first. Each cleanup function will be called

at most once. Since Python’s internal finalization will have completed before

the cleanup function, no Python APIs should be called by func.

</dd></dl>

</div>

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