asyncio-subprocess.po

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# Leon H., 2017
msgid ""
msgstr ""
"Project-Id-Version: Python 3.13\n"
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"POT-Creation-Date: 2024-09-03 11:11+0800\n"
"PO-Revision-Date: 2018-05-23 14:39+0000\n"
"Last-Translator: Adrian Liaw <adrianliaw2000@gmail.com>\n"
"Language-Team: Chinese - TAIWAN (https://github.com/python/python-docs-zh-"
"tw)\n"
"Language: zh_TW\n"
"MIME-Version: 1.0\n"
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"Plural-Forms: nplurals=1; plural=0;\n"

#: ../../library/asyncio-subprocess.rst:7
msgid "Subprocesses"
msgstr "子行程"

#: ../../library/asyncio-subprocess.rst:9
msgid ""
"**Source code:** :source:`Lib/asyncio/subprocess.py`, :source:`Lib/asyncio/"
"base_subprocess.py`"
msgstr ""
"**原始碼：**\\ :source:`Lib/asyncio/subprocess.py`、:source:`Lib/asyncio/"
"base_subprocess.py`"

#: ../../library/asyncio-subprocess.rst:14
msgid ""
"This section describes high-level async/await asyncio APIs to create and "
"manage subprocesses."
msgstr ""

#: ../../library/asyncio-subprocess.rst:19
msgid ""
"Here's an example of how asyncio can run a shell command and obtain its "
"result::"
msgstr ""

#: ../../library/asyncio-subprocess.rst:22
msgid ""
"import asyncio\n"
"\n"
"async def run(cmd):\n"
"    proc = await asyncio.create_subprocess_shell(\n"
"        cmd,\n"
"        stdout=asyncio.subprocess.PIPE,\n"
"        stderr=asyncio.subprocess.PIPE)\n"
"\n"
"    stdout, stderr = await proc.communicate()\n"
"\n"
"    print(f'[{cmd!r} exited with {proc.returncode}]')\n"
"    if stdout:\n"
"        print(f'[stdout]\\n{stdout.decode()}')\n"
"    if stderr:\n"
"        print(f'[stderr]\\n{stderr.decode()}')\n"
"\n"
"asyncio.run(run('ls /zzz'))"
msgstr ""
"import asyncio\n"
"\n"
"async def run(cmd):\n"
"    proc = await asyncio.create_subprocess_shell(\n"
"        cmd,\n"
"        stdout=asyncio.subprocess.PIPE,\n"
"        stderr=asyncio.subprocess.PIPE)\n"
"\n"
"    stdout, stderr = await proc.communicate()\n"
"\n"
"    print(f'[{cmd!r} exited with {proc.returncode}]')\n"
"    if stdout:\n"
"        print(f'[stdout]\\n{stdout.decode()}')\n"
"    if stderr:\n"
"        print(f'[stderr]\\n{stderr.decode()}')\n"
"\n"
"asyncio.run(run('ls /zzz'))"

#: ../../library/asyncio-subprocess.rst:40
msgid "will print::"
msgstr ""

#: ../../library/asyncio-subprocess.rst:42
msgid ""
"['ls /zzz' exited with 1]\n"
"[stderr]\n"
"ls: /zzz: No such file or directory"
msgstr ""
"['ls /zzz' exited with 1]\n"
"[stderr]\n"
"ls: /zzz: No such file or directory"

#: ../../library/asyncio-subprocess.rst:46
msgid ""
"Because all asyncio subprocess functions are asynchronous and asyncio "
"provides many tools to work with such functions, it is easy to execute and "
"monitor multiple subprocesses in parallel.  It is indeed trivial to modify "
"the above example to run several commands simultaneously::"
msgstr ""

#: ../../library/asyncio-subprocess.rst:51
msgid ""
"async def main():\n"
"    await asyncio.gather(\n"
"        run('ls /zzz'),\n"
"        run('sleep 1; echo \"hello\"'))\n"
"\n"
"asyncio.run(main())"
msgstr ""
"async def main():\n"
"    await asyncio.gather(\n"
"        run('ls /zzz'),\n"
"        run('sleep 1; echo \"hello\"'))\n"
"\n"
"asyncio.run(main())"

#: ../../library/asyncio-subprocess.rst:58
msgid "See also the `Examples`_ subsection."
msgstr "另請參閱\\ `Examples`_。"

#: ../../library/asyncio-subprocess.rst:62
msgid "Creating Subprocesses"
msgstr "建立子行程"

#: ../../library/asyncio-subprocess.rst:67
msgid "Create a subprocess."
msgstr ""

#: ../../library/asyncio-subprocess.rst:69
#: ../../library/asyncio-subprocess.rst:87
msgid ""
"The *limit* argument sets the buffer limit for :class:`StreamReader` "
"wrappers for :attr:`Process.stdout` and :attr:`Process.stderr` (if :const:"
"`subprocess.PIPE` is passed to *stdout* and *stderr* arguments)."
msgstr ""

#: ../../library/asyncio-subprocess.rst:73
#: ../../library/asyncio-subprocess.rst:91
msgid "Return a :class:`~asyncio.subprocess.Process` instance."
msgstr ""

#: ../../library/asyncio-subprocess.rst:75
msgid ""
"See the documentation of :meth:`loop.subprocess_exec` for other parameters."
msgstr ""

#: ../../library/asyncio-subprocess.rst:78
#: ../../library/asyncio-subprocess.rst:105
msgid "Removed the *loop* parameter."
msgstr ""

#: ../../library/asyncio-subprocess.rst:85
msgid "Run the *cmd* shell command."
msgstr ""

#: ../../library/asyncio-subprocess.rst:93
msgid ""
"See the documentation of :meth:`loop.subprocess_shell` for other parameters."
msgstr ""

#: ../../library/asyncio-subprocess.rst:98
msgid ""
"It is the application's responsibility to ensure that all whitespace and "
"special characters are quoted appropriately to avoid `shell injection "
"<https://en.wikipedia.org/wiki/Shell_injection#Shell_injection>`_ "
"vulnerabilities. The :func:`shlex.quote` function can be used to properly "
"escape whitespace and special shell characters in strings that are going to "
"be used to construct shell commands."
msgstr ""

#: ../../library/asyncio-subprocess.rst:110
msgid ""
"Subprocesses are available for Windows if a :class:`ProactorEventLoop` is "
"used. See :ref:`Subprocess Support on Windows <asyncio-windows-subprocess>` "
"for details."
msgstr ""

#: ../../library/asyncio-subprocess.rst:116
msgid ""
"asyncio also has the following *low-level* APIs to work with subprocesses: :"
"meth:`loop.subprocess_exec`, :meth:`loop.subprocess_shell`, :meth:`loop."
"connect_read_pipe`, :meth:`loop.connect_write_pipe`, as well as the :ref:"
"`Subprocess Transports <asyncio-subprocess-transports>` and :ref:`Subprocess "
"Protocols <asyncio-subprocess-protocols>`."
msgstr ""

#: ../../library/asyncio-subprocess.rst:124
msgid "Constants"
msgstr "常數"

#: ../../library/asyncio-subprocess.rst:129
msgid "Can be passed to the *stdin*, *stdout* or *stderr* parameters."
msgstr ""

#: ../../library/asyncio-subprocess.rst:131
msgid ""
"If *PIPE* is passed to *stdin* argument, the :attr:`Process.stdin <asyncio."
"subprocess.Process.stdin>` attribute will point to a :class:`StreamWriter` "
"instance."
msgstr ""

#: ../../library/asyncio-subprocess.rst:135
msgid ""
"If *PIPE* is passed to *stdout* or *stderr* arguments, the :attr:`Process."
"stdout <asyncio.subprocess.Process.stdout>` and :attr:`Process.stderr "
"<asyncio.subprocess.Process.stderr>` attributes will point to :class:"
"`StreamReader` instances."
msgstr ""

#: ../../library/asyncio-subprocess.rst:143
msgid ""
"Special value that can be used as the *stderr* argument and indicates that "
"standard error should be redirected into standard output."
msgstr ""

#: ../../library/asyncio-subprocess.rst:149
msgid ""
"Special value that can be used as the *stdin*, *stdout* or *stderr* argument "
"to process creation functions.  It indicates that the special file :data:`os."
"devnull` will be used for the corresponding subprocess stream."
msgstr ""

#: ../../library/asyncio-subprocess.rst:155
msgid "Interacting with Subprocesses"
msgstr ""

#: ../../library/asyncio-subprocess.rst:157
msgid ""
"Both :func:`create_subprocess_exec` and :func:`create_subprocess_shell` "
"functions return instances of the *Process* class.  *Process* is a high-"
"level wrapper that allows communicating with subprocesses and watching for "
"their completion."
msgstr ""

#: ../../library/asyncio-subprocess.rst:165
msgid ""
"An object that wraps OS processes created by the :func:"
"`create_subprocess_exec` and :func:`create_subprocess_shell` functions."
msgstr ""

#: ../../library/asyncio-subprocess.rst:169
msgid ""
"This class is designed to have a similar API to the :class:`subprocess."
"Popen` class, but there are some notable differences:"
msgstr ""

#: ../../library/asyncio-subprocess.rst:173
msgid ""
"unlike Popen, Process instances do not have an equivalent to the :meth:"
"`~subprocess.Popen.poll` method;"
msgstr ""

#: ../../library/asyncio-subprocess.rst:176
msgid ""
"the :meth:`~asyncio.subprocess.Process.communicate` and :meth:`~asyncio."
"subprocess.Process.wait` methods don't have a *timeout* parameter: use the :"
"func:`~asyncio.wait_for` function;"
msgstr ""

#: ../../library/asyncio-subprocess.rst:180
msgid ""
"the :meth:`Process.wait() <asyncio.subprocess.Process.wait>` method is "
"asynchronous, whereas :meth:`subprocess.Popen.wait` method is implemented as "
"a blocking busy loop;"
msgstr ""

#: ../../library/asyncio-subprocess.rst:184
msgid "the *universal_newlines* parameter is not supported."
msgstr ""

#: ../../library/asyncio-subprocess.rst:186
msgid "This class is :ref:`not thread safe <asyncio-multithreading>`."
msgstr ""

#: ../../library/asyncio-subprocess.rst:188
msgid ""
"See also the :ref:`Subprocess and Threads <asyncio-subprocess-threads>` "
"section."
msgstr ""

#: ../../library/asyncio-subprocess.rst:193
msgid "Wait for the child process to terminate."
msgstr ""

#: ../../library/asyncio-subprocess.rst:195
msgid "Set and return the :attr:`returncode` attribute."
msgstr ""

#: ../../library/asyncio-subprocess.rst:199
msgid ""
"This method can deadlock when using ``stdout=PIPE`` or ``stderr=PIPE`` and "
"the child process generates so much output that it blocks waiting for the OS "
"pipe buffer to accept more data. Use the :meth:`communicate` method when "
"using pipes to avoid this condition."
msgstr ""

#: ../../library/asyncio-subprocess.rst:207
msgid "Interact with process:"
msgstr ""

#: ../../library/asyncio-subprocess.rst:209
msgid "send data to *stdin* (if *input* is not ``None``);"
msgstr ""

#: ../../library/asyncio-subprocess.rst:210
msgid "closes *stdin*;"
msgstr ""

#: ../../library/asyncio-subprocess.rst:211
msgid "read data from *stdout* and *stderr*, until EOF is reached;"
msgstr ""

#: ../../library/asyncio-subprocess.rst:212
msgid "wait for process to terminate."
msgstr ""

#: ../../library/asyncio-subprocess.rst:214
msgid ""
"The optional *input* argument is the data (:class:`bytes` object) that will "
"be sent to the child process."
msgstr ""

#: ../../library/asyncio-subprocess.rst:217
msgid "Return a tuple ``(stdout_data, stderr_data)``."
msgstr ""

#: ../../library/asyncio-subprocess.rst:219
msgid ""
"If either :exc:`BrokenPipeError` or :exc:`ConnectionResetError` exception is "
"raised when writing *input* into *stdin*, the exception is ignored.  This "
"condition occurs when the process exits before all data are written into "
"*stdin*."
msgstr ""

#: ../../library/asyncio-subprocess.rst:224
msgid ""
"If it is desired to send data to the process' *stdin*, the process needs to "
"be created with ``stdin=PIPE``.  Similarly, to get anything other than "
"``None`` in the result tuple, the process has to be created with "
"``stdout=PIPE`` and/or ``stderr=PIPE`` arguments."
msgstr ""

#: ../../library/asyncio-subprocess.rst:230
msgid ""
"Note, that the data read is buffered in memory, so do not use this method if "
"the data size is large or unlimited."
msgstr ""

#: ../../library/asyncio-subprocess.rst:235
msgid "*stdin* gets closed when `input=None` too."
msgstr ""

#: ../../library/asyncio-subprocess.rst:239
msgid "Sends the signal *signal* to the child process."
msgstr ""

#: ../../library/asyncio-subprocess.rst:243
msgid ""
"On Windows, :py:const:`~signal.SIGTERM` is an alias for :meth:`terminate`. "
"``CTRL_C_EVENT`` and ``CTRL_BREAK_EVENT`` can be sent to processes started "
"with a *creationflags* parameter which includes ``CREATE_NEW_PROCESS_GROUP``."
msgstr ""

#: ../../library/asyncio-subprocess.rst:250
msgid "Stop the child process."
msgstr ""

#: ../../library/asyncio-subprocess.rst:252
msgid ""
"On POSIX systems this method sends :py:const:`~signal.SIGTERM` to the child "
"process."
msgstr ""

#: ../../library/asyncio-subprocess.rst:255
msgid ""
"On Windows the Win32 API function :c:func:`!TerminateProcess` is called to "
"stop the child process."
msgstr ""

#: ../../library/asyncio-subprocess.rst:260
msgid "Kill the child process."
msgstr ""

#: ../../library/asyncio-subprocess.rst:262
msgid ""
"On POSIX systems this method sends :py:data:`SIGKILL` to the child process."
msgstr ""

#: ../../library/asyncio-subprocess.rst:265
msgid "On Windows this method is an alias for :meth:`terminate`."
msgstr ""

#: ../../library/asyncio-subprocess.rst:269
msgid ""
"Standard input stream (:class:`StreamWriter`) or ``None`` if the process was "
"created with ``stdin=None``."
msgstr ""

#: ../../library/asyncio-subprocess.rst:274
msgid ""
"Standard output stream (:class:`StreamReader`) or ``None`` if the process "
"was created with ``stdout=None``."
msgstr ""

#: ../../library/asyncio-subprocess.rst:279
msgid ""
"Standard error stream (:class:`StreamReader`) or ``None`` if the process was "
"created with ``stderr=None``."
msgstr ""

#: ../../library/asyncio-subprocess.rst:284
msgid ""
"Use the :meth:`communicate` method rather than :attr:`process.stdin.write() "
"<stdin>`, :attr:`await process.stdout.read() <stdout>` or :attr:`await "
"process.stderr.read() <stderr>`. This avoids deadlocks due to streams "
"pausing reading or writing and blocking the child process."
msgstr ""

#: ../../library/asyncio-subprocess.rst:293
msgid "Process identification number (PID)."
msgstr ""

#: ../../library/asyncio-subprocess.rst:295
msgid ""
"Note that for processes created by the :func:`create_subprocess_shell` "
"function, this attribute is the PID of the spawned shell."
msgstr ""

#: ../../library/asyncio-subprocess.rst:300
msgid "Return code of the process when it exits."
msgstr ""

#: ../../library/asyncio-subprocess.rst:302
msgid "A ``None`` value indicates that the process has not terminated yet."
msgstr ""

#: ../../library/asyncio-subprocess.rst:304
msgid ""
"A negative value ``-N`` indicates that the child was terminated by signal "
"``N`` (POSIX only)."
msgstr ""

#: ../../library/asyncio-subprocess.rst:311
msgid "Subprocess and Threads"
msgstr "子行程與線程"

#: ../../library/asyncio-subprocess.rst:313
msgid ""
"Standard asyncio event loop supports running subprocesses from different "
"threads by default."
msgstr ""

#: ../../library/asyncio-subprocess.rst:316
msgid ""
"On Windows subprocesses are provided by :class:`ProactorEventLoop` only "
"(default), :class:`SelectorEventLoop` has no subprocess support."
msgstr ""

#: ../../library/asyncio-subprocess.rst:319
msgid ""
"On UNIX *child watchers* are used for subprocess finish waiting, see :ref:"
"`asyncio-watchers` for more info."
msgstr ""

#: ../../library/asyncio-subprocess.rst:325
msgid ""
"UNIX switched to use :class:`ThreadedChildWatcher` for spawning subprocesses "
"from different threads without any limitation."
msgstr ""

#: ../../library/asyncio-subprocess.rst:328
msgid ""
"Spawning a subprocess with *inactive* current child watcher raises :exc:"
"`RuntimeError`."
msgstr ""

#: ../../library/asyncio-subprocess.rst:331
msgid ""
"Note that alternative event loop implementations might have own limitations; "
"please refer to their documentation."
msgstr ""

#: ../../library/asyncio-subprocess.rst:336
msgid ""
"The :ref:`Concurrency and multithreading in asyncio <asyncio-"
"multithreading>` section."
msgstr ""

#: ../../library/asyncio-subprocess.rst:341
msgid "Examples"
msgstr "範例"

#: ../../library/asyncio-subprocess.rst:343
msgid ""
"An example using the :class:`~asyncio.subprocess.Process` class to control a "
"subprocess and the :class:`StreamReader` class to read from its standard "
"output."
msgstr ""

#: ../../library/asyncio-subprocess.rst:349
msgid ""
"The subprocess is created by the :func:`create_subprocess_exec` function::"
msgstr ""

#: ../../library/asyncio-subprocess.rst:352
msgid ""
"import asyncio\n"
"import sys\n"
"\n"
"async def get_date():\n"
"    code = 'import datetime; print(datetime.datetime.now())'\n"
"\n"
"    # Create the subprocess; redirect the standard output\n"
"    # into a pipe.\n"
"    proc = await asyncio.create_subprocess_exec(\n"
"        sys.executable, '-c', code,\n"
"        stdout=asyncio.subprocess.PIPE)\n"
"\n"
"    # Read one line of output.\n"
"    data = await proc.stdout.readline()\n"
"    line = data.decode('ascii').rstrip()\n"
"\n"
"    # Wait for the subprocess exit.\n"
"    await proc.wait()\n"
"    return line\n"
"\n"
"date = asyncio.run(get_date())\n"
"print(f\"Current date: {date}\")"
msgstr ""

#: ../../library/asyncio-subprocess.rst:376
msgid ""
"See also the :ref:`same example <asyncio_example_subprocess_proto>` written "
"using low-level APIs."
msgstr ""