asyncio-task.po

# Copyright (C) 2001-2024, Python Software Foundation
# This file is distributed under the same license as the Python package.
#
# Translators:
msgid ""
msgstr ""
"Project-Id-Version: Python 3.13\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2024-10-13 00:14+0000\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"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Plural-Forms: nplurals=1; plural=0;\n"

#: ../../library/asyncio-task.rst:6
msgid "Coroutines and Tasks"
msgstr "協程與任務"

#: ../../library/asyncio-task.rst:8
msgid ""
"This section outlines high-level asyncio APIs to work with coroutines and "
"Tasks."
msgstr ""

#: ../../library/asyncio-task.rst:19 ../../library/asyncio-task.rst:148
msgid "Coroutines"
msgstr "協程"

#: ../../library/asyncio-task.rst:21
msgid "**Source code:** :source:`Lib/asyncio/coroutines.py`"
msgstr "**原始碼：**\\ :source:`Lib/asyncio/coroutines.py`"

#: ../../library/asyncio-task.rst:25
msgid ""
":term:`Coroutines <coroutine>` declared with the async/await syntax is the "
"preferred way of writing asyncio applications.  For example, the following "
"snippet of code prints \"hello\", waits 1 second, and then prints \"world\"::"
msgstr ""

#: ../../library/asyncio-task.rst:30
msgid ""
">>> import asyncio\n"
"\n"
">>> async def main():\n"
"...     print('hello')\n"
"...     await asyncio.sleep(1)\n"
"...     print('world')\n"
"\n"
">>> asyncio.run(main())\n"
"hello\n"
"world"
msgstr ""
">>> import asyncio\n"
"\n"
">>> async def main():\n"
"...     print('hello')\n"
"...     await asyncio.sleep(1)\n"
"...     print('world')\n"
"\n"
">>> asyncio.run(main())\n"
"hello\n"
"world"

#: ../../library/asyncio-task.rst:41
msgid ""
"Note that simply calling a coroutine will not schedule it to be executed::"
msgstr ""

#: ../../library/asyncio-task.rst:44
msgid ""
">>> main()\n"
"<coroutine object main at 0x1053bb7c8>"
msgstr ""
">>> main()\n"
"<coroutine object main at 0x1053bb7c8>"

#: ../../library/asyncio-task.rst:47
msgid "To actually run a coroutine, asyncio provides the following mechanisms:"
msgstr ""

#: ../../library/asyncio-task.rst:49
msgid ""
"The :func:`asyncio.run` function to run the top-level entry point \"main()\" "
"function (see the above example.)"
msgstr ""

#: ../../library/asyncio-task.rst:52
msgid ""
"Awaiting on a coroutine.  The following snippet of code will print \"hello\" "
"after waiting for 1 second, and then print \"world\" after waiting for "
"*another* 2 seconds::"
msgstr ""

#: ../../library/asyncio-task.rst:56
msgid ""
"import asyncio\n"
"import time\n"
"\n"
"async def say_after(delay, what):\n"
"    await asyncio.sleep(delay)\n"
"    print(what)\n"
"\n"
"async def main():\n"
"    print(f\"started at {time.strftime('%X')}\")\n"
"\n"
"    await say_after(1, 'hello')\n"
"    await say_after(2, 'world')\n"
"\n"
"    print(f\"finished at {time.strftime('%X')}\")\n"
"\n"
"asyncio.run(main())"
msgstr ""
"import asyncio\n"
"import time\n"
"\n"
"async def say_after(delay, what):\n"
"    await asyncio.sleep(delay)\n"
"    print(what)\n"
"\n"
"async def main():\n"
"    print(f\"started at {time.strftime('%X')}\")\n"
"\n"
"    await say_after(1, 'hello')\n"
"    await say_after(2, 'world')\n"
"\n"
"    print(f\"finished at {time.strftime('%X')}\")\n"
"\n"
"asyncio.run(main())"

#: ../../library/asyncio-task.rst:73
msgid "Expected output::"
msgstr "預期的輸出： ::"

#: ../../library/asyncio-task.rst:75
msgid ""
"started at 17:13:52\n"
"hello\n"
"world\n"
"finished at 17:13:55"
msgstr ""
"started at 17:13:52\n"
"hello\n"
"world\n"
"finished at 17:13:55"

#: ../../library/asyncio-task.rst:80
msgid ""
"The :func:`asyncio.create_task` function to run coroutines concurrently as "
"asyncio :class:`Tasks <Task>`."
msgstr ""

#: ../../library/asyncio-task.rst:83
msgid ""
"Let's modify the above example and run two ``say_after`` coroutines "
"*concurrently*::"
msgstr ""

#: ../../library/asyncio-task.rst:86
msgid ""
"async def main():\n"
"    task1 = asyncio.create_task(\n"
"        say_after(1, 'hello'))\n"
"\n"
"    task2 = asyncio.create_task(\n"
"        say_after(2, 'world'))\n"
"\n"
"    print(f\"started at {time.strftime('%X')}\")\n"
"\n"
"    # Wait until both tasks are completed (should take\n"
"    # around 2 seconds.)\n"
"    await task1\n"
"    await task2\n"
"\n"
"    print(f\"finished at {time.strftime('%X')}\")"
msgstr ""

#: ../../library/asyncio-task.rst:102
msgid ""
"Note that expected output now shows that the snippet runs 1 second faster "
"than before::"
msgstr ""

#: ../../library/asyncio-task.rst:105
msgid ""
"started at 17:14:32\n"
"hello\n"
"world\n"
"finished at 17:14:34"
msgstr ""
"started at 17:14:32\n"
"hello\n"
"world\n"
"finished at 17:14:34"

#: ../../library/asyncio-task.rst:110
msgid ""
"The :class:`asyncio.TaskGroup` class provides a more modern alternative to :"
"func:`create_task`. Using this API, the last example becomes::"
msgstr ""

#: ../../library/asyncio-task.rst:114
msgid ""
"async def main():\n"
"    async with asyncio.TaskGroup() as tg:\n"
"        task1 = tg.create_task(\n"
"            say_after(1, 'hello'))\n"
"\n"
"        task2 = tg.create_task(\n"
"            say_after(2, 'world'))\n"
"\n"
"        print(f\"started at {time.strftime('%X')}\")\n"
"\n"
"    # The await is implicit when the context manager exits.\n"
"\n"
"    print(f\"finished at {time.strftime('%X')}\")"
msgstr ""

#: ../../library/asyncio-task.rst:128
msgid "The timing and output should be the same as for the previous version."
msgstr ""

#: ../../library/asyncio-task.rst:130
msgid ":class:`asyncio.TaskGroup`."
msgstr ":class:`asyncio.TaskGroup`。"

#: ../../library/asyncio-task.rst:137
msgid "Awaitables"
msgstr ""

#: ../../library/asyncio-task.rst:139
msgid ""
"We say that an object is an **awaitable** object if it can be used in an :"
"keyword:`await` expression.  Many asyncio APIs are designed to accept "
"awaitables."
msgstr ""

#: ../../library/asyncio-task.rst:143
msgid ""
"There are three main types of *awaitable* objects: **coroutines**, "
"**Tasks**, and **Futures**."
msgstr ""

#: ../../library/asyncio-task.rst:149
msgid ""
"Python coroutines are *awaitables* and therefore can be awaited from other "
"coroutines::"
msgstr ""

#: ../../library/asyncio-task.rst:152
msgid ""
"import asyncio\n"
"\n"
"async def nested():\n"
"    return 42\n"
"\n"
"async def main():\n"
"    # Nothing happens if we just call \"nested()\".\n"
"    # A coroutine object is created but not awaited,\n"
"    # so it *won't run at all*.\n"
"    nested()  # will raise a \"RuntimeWarning\".\n"
"\n"
"    # Let's do it differently now and await it:\n"
"    print(await nested())  # will print \"42\".\n"
"\n"
"asyncio.run(main())"
msgstr ""

#: ../../library/asyncio-task.rst:170
msgid ""
"In this documentation the term \"coroutine\" can be used for two closely "
"related concepts:"
msgstr ""

#: ../../library/asyncio-task.rst:173
msgid "a *coroutine function*: an :keyword:`async def` function;"
msgstr ""

#: ../../library/asyncio-task.rst:175
msgid ""
"a *coroutine object*: an object returned by calling a *coroutine function*."
msgstr ""

#: ../../library/asyncio-task.rst:180
msgid "Tasks"
msgstr ""

#: ../../library/asyncio-task.rst:181
msgid "*Tasks* are used to schedule coroutines *concurrently*."
msgstr ""

#: ../../library/asyncio-task.rst:183
msgid ""
"When a coroutine is wrapped into a *Task* with functions like :func:`asyncio."
"create_task` the coroutine is automatically scheduled to run soon::"
msgstr ""

#: ../../library/asyncio-task.rst:187
msgid ""
"import asyncio\n"
"\n"
"async def nested():\n"
"    return 42\n"
"\n"
"async def main():\n"
"    # Schedule nested() to run soon concurrently\n"
"    # with \"main()\".\n"
"    task = asyncio.create_task(nested())\n"
"\n"
"    # \"task\" can now be used to cancel \"nested()\", or\n"
"    # can simply be awaited to wait until it is complete:\n"
"    await task\n"
"\n"
"asyncio.run(main())"
msgstr ""

#: ../../library/asyncio-task.rst:205
msgid "Futures"
msgstr ""

#: ../../library/asyncio-task.rst:206
msgid ""
"A :class:`Future` is a special **low-level** awaitable object that "
"represents an **eventual result** of an asynchronous operation."
msgstr ""

#: ../../library/asyncio-task.rst:209
msgid ""
"When a Future object is *awaited* it means that the coroutine will wait "
"until the Future is resolved in some other place."
msgstr ""

#: ../../library/asyncio-task.rst:212
msgid ""
"Future objects in asyncio are needed to allow callback-based code to be used "
"with async/await."
msgstr ""

#: ../../library/asyncio-task.rst:215
msgid ""
"Normally **there is no need** to create Future objects at the application "
"level code."
msgstr ""

#: ../../library/asyncio-task.rst:218
msgid ""
"Future objects, sometimes exposed by libraries and some asyncio APIs, can be "
"awaited::"
msgstr ""

#: ../../library/asyncio-task.rst:221
msgid ""
"async def main():\n"
"    await function_that_returns_a_future_object()\n"
"\n"
"    # this is also valid:\n"
"    await asyncio.gather(\n"
"        function_that_returns_a_future_object(),\n"
"        some_python_coroutine()\n"
"    )"
msgstr ""

#: ../../library/asyncio-task.rst:230
msgid ""
"A good example of a low-level function that returns a Future object is :meth:"
"`loop.run_in_executor`."
msgstr ""

#: ../../library/asyncio-task.rst:235
msgid "Creating Tasks"
msgstr ""

#: ../../library/asyncio-task.rst:237
msgid "**Source code:** :source:`Lib/asyncio/tasks.py`"
msgstr "**原始碼：**\\ :source:`Lib/asyncio/tasks.py`"

#: ../../library/asyncio-task.rst:243
msgid ""
"Wrap the *coro* :ref:`coroutine <coroutine>` into a :class:`Task` and "
"schedule its execution.  Return the Task object."
msgstr ""

#: ../../library/asyncio-task.rst:246
msgid ""
"If *name* is not ``None``, it is set as the name of the task using :meth:"
"`Task.set_name`."
msgstr ""

#: ../../library/asyncio-task.rst:249
msgid ""
"An optional keyword-only *context* argument allows specifying a custom :"
"class:`contextvars.Context` for the *coro* to run in. The current context "
"copy is created when no *context* is provided."
msgstr ""

#: ../../library/asyncio-task.rst:253
msgid ""
"The task is executed in the loop returned by :func:`get_running_loop`, :exc:"
"`RuntimeError` is raised if there is no running loop in current thread."
msgstr ""

#: ../../library/asyncio-task.rst:259
msgid ""
":meth:`asyncio.TaskGroup.create_task` is a new alternative leveraging "
"structural concurrency; it allows for waiting for a group of related tasks "
"with strong safety guarantees."
msgstr ""

#: ../../library/asyncio-task.rst:265
msgid ""
"Save a reference to the result of this function, to avoid a task "
"disappearing mid-execution. The event loop only keeps weak references to "
"tasks. A task that isn't referenced elsewhere may get garbage collected at "
"any time, even before it's done. For reliable \"fire-and-forget\" background "
"tasks, gather them in a collection::"
msgstr ""

#: ../../library/asyncio-task.rst:272
msgid ""
"background_tasks = set()\n"
"\n"
"for i in range(10):\n"
"    task = asyncio.create_task(some_coro(param=i))\n"
"\n"
"    # Add task to the set. This creates a strong reference.\n"
"    background_tasks.add(task)\n"
"\n"
"    # To prevent keeping references to finished tasks forever,\n"
"    # make each task remove its own reference from the set after\n"
"    # completion:\n"
"    task.add_done_callback(background_tasks.discard)"
msgstr ""

#: ../../library/asyncio-task.rst:287 ../../library/asyncio-task.rst:1188
msgid "Added the *name* parameter."
msgstr "新增 *name* 參數。"

#: ../../library/asyncio-task.rst:290 ../../library/asyncio-task.rst:1195
msgid "Added the *context* parameter."
msgstr "新增 *context* 參數。"

#: ../../library/asyncio-task.rst:295
msgid "Task Cancellation"
msgstr ""

#: ../../library/asyncio-task.rst:297
msgid ""
"Tasks can easily and safely be cancelled. When a task is cancelled, :exc:"
"`asyncio.CancelledError` will be raised in the task at the next opportunity."
msgstr ""

#: ../../library/asyncio-task.rst:301
msgid ""
"It is recommended that coroutines use ``try/finally`` blocks to robustly "
"perform clean-up logic. In case :exc:`asyncio.CancelledError` is explicitly "
"caught, it should generally be propagated when clean-up is complete. :exc:"
"`asyncio.CancelledError` directly subclasses :exc:`BaseException` so most "
"code will not need to be aware of it."
msgstr ""

#: ../../library/asyncio-task.rst:307
msgid ""
"The asyncio components that enable structured concurrency, like :class:"
"`asyncio.TaskGroup` and :func:`asyncio.timeout`, are implemented using "
"cancellation internally and might misbehave if a coroutine swallows :exc:"
"`asyncio.CancelledError`. Similarly, user code should not generally call :"
"meth:`uncancel <asyncio.Task.uncancel>`. However, in cases when suppressing :"
"exc:`asyncio.CancelledError` is truly desired, it is necessary to also call "
"``uncancel()`` to completely remove the cancellation state."
msgstr ""

#: ../../library/asyncio-task.rst:319
msgid "Task Groups"
msgstr ""

#: ../../library/asyncio-task.rst:321
msgid ""
"Task groups combine a task creation API with a convenient and reliable way "
"to wait for all tasks in the group to finish."
msgstr ""

#: ../../library/asyncio-task.rst:326
msgid ""
"An :ref:`asynchronous context manager <async-context-managers>` holding a "
"group of tasks. Tasks can be added to the group using :meth:`create_task`. "
"All tasks are awaited when the context manager exits."
msgstr ""

#: ../../library/asyncio-task.rst:335
msgid ""
"Create a task in this task group. The signature matches that of :func:"
"`asyncio.create_task`. If the task group is inactive (e.g. not yet entered, "
"already finished, or in the process of shutting down), we will close the "
"given ``coro``."
msgstr ""

#: ../../library/asyncio-task.rst:343
msgid "Close the given coroutine if the task group is not active."
msgstr ""

#: ../../library/asyncio-task.rst:345 ../../library/asyncio-task.rst:550
#: ../../library/asyncio-task.rst:723 ../../library/asyncio-task.rst:781
#: ../../library/asyncio-task.rst:807 ../../library/asyncio-task.rst:847
msgid "Example::"
msgstr "範例： ::"

#: ../../library/asyncio-task.rst:347
msgid ""
"async def main():\n"
"    async with asyncio.TaskGroup() as tg:\n"
"        task1 = tg.create_task(some_coro(...))\n"
"        task2 = tg.create_task(another_coro(...))\n"
"    print(f\"Both tasks have completed now: {task1.result()}, {task2."
"result()}\")"
msgstr ""

#: ../../library/asyncio-task.rst:353
msgid ""
"The ``async with`` statement will wait for all tasks in the group to finish. "
"While waiting, new tasks may still be added to the group (for example, by "
"passing ``tg`` into one of the coroutines and calling ``tg.create_task()`` "
"in that coroutine). Once the last task has finished and the ``async with`` "
"block is exited, no new tasks may be added to the group."
msgstr ""

#: ../../library/asyncio-task.rst:360
msgid ""
"The first time any of the tasks belonging to the group fails with an "
"exception other than :exc:`asyncio.CancelledError`, the remaining tasks in "
"the group are cancelled. No further tasks can then be added to the group. At "
"this point, if the body of the ``async with`` statement is still active (i."
"e., :meth:`~object.__aexit__` hasn't been called yet), the task directly "
"containing the ``async with`` statement is also cancelled. The resulting :"
"exc:`asyncio.CancelledError` will interrupt an ``await``, but it will not "
"bubble out of the containing ``async with`` statement."
msgstr ""

#: ../../library/asyncio-task.rst:370
msgid ""
"Once all tasks have finished, if any tasks have failed with an exception "
"other than :exc:`asyncio.CancelledError`, those exceptions are combined in "
"an :exc:`ExceptionGroup` or :exc:`BaseExceptionGroup` (as appropriate; see "
"their documentation) which is then raised."
msgstr ""

#: ../../library/asyncio-task.rst:377
msgid ""
"Two base exceptions are treated specially: If any task fails with :exc:"
"`KeyboardInterrupt` or :exc:`SystemExit`, the task group still cancels the "
"remaining tasks and waits for them, but then the initial :exc:"
"`KeyboardInterrupt` or :exc:`SystemExit` is re-raised instead of :exc:"
"`ExceptionGroup` or :exc:`BaseExceptionGroup`."
msgstr ""

#: ../../library/asyncio-task.rst:383
msgid ""
"If the body of the ``async with`` statement exits with an exception (so :"
"meth:`~object.__aexit__` is called with an exception set), this is treated "
"the same as if one of the tasks failed: the remaining tasks are cancelled "
"and then waited for, and non-cancellation exceptions are grouped into an "
"exception group and raised. The exception passed into :meth:`~object."
"__aexit__`, unless it is :exc:`asyncio.CancelledError`, is also included in "
"the exception group. The same special case is made for :exc:"
"`KeyboardInterrupt` and :exc:`SystemExit` as in the previous paragraph."
msgstr ""

#: ../../library/asyncio-task.rst:395
msgid ""
"Task groups are careful not to mix up the internal cancellation used to "
"\"wake up\" their :meth:`~object.__aexit__` with cancellation requests for "
"the task in which they are running made by other parties. In particular, "
"when one task group is syntactically nested in another, and both experience "
"an exception in one of their child tasks simultaneously, the inner task "
"group will process its exceptions, and then the outer task group will "
"receive another cancellation and process its own exceptions."
msgstr ""

#: ../../library/asyncio-task.rst:403
msgid ""
"In the case where a task group is cancelled externally and also must raise "
"an :exc:`ExceptionGroup`, it will call the parent task's :meth:`~asyncio."
"Task.cancel` method. This ensures that a :exc:`asyncio.CancelledError` will "
"be raised at the next :keyword:`await`, so the cancellation is not lost."
msgstr ""

#: ../../library/asyncio-task.rst:409
msgid ""
"Task groups preserve the cancellation count reported by :meth:`asyncio.Task."
"cancelling`."
msgstr ""

#: ../../library/asyncio-task.rst:414
msgid ""
"Improved handling of simultaneous internal and external cancellations and "
"correct preservation of cancellation counts."
msgstr ""

#: ../../library/asyncio-task.rst:418
msgid "Terminating a Task Group"
msgstr ""

#: ../../library/asyncio-task.rst:420
msgid ""
"While terminating a task group is not natively supported by the standard "
"library, termination can be achieved by adding an exception-raising task to "
"the task group and ignoring the raised exception:"
msgstr ""

#: ../../library/asyncio-task.rst:424
msgid ""
"import asyncio\n"
"from asyncio import TaskGroup\n"
"\n"
"class TerminateTaskGroup(Exception):\n"
"    \"\"\"Exception raised to terminate a task group.\"\"\"\n"
"\n"
"async def force_terminate_task_group():\n"
"    \"\"\"Used to force termination of a task group.\"\"\"\n"
"    raise TerminateTaskGroup()\n"
"\n"
"async def job(task_id, sleep_time):\n"
"    print(f'Task {task_id}: start')\n"
"    await asyncio.sleep(sleep_time)\n"
"    print(f'Task {task_id}: done')\n"
"\n"
"async def main():\n"
"    try:\n"
"        async with TaskGroup() as group:\n"
"            # spawn some tasks\n"
"            group.create_task(job(1, 0.5))\n"
"            group.create_task(job(2, 1.5))\n"
"            # sleep for 1 second\n"
"            await asyncio.sleep(1)\n"
"            # add an exception-raising task to force the group to terminate\n"
"            group.create_task(force_terminate_task_group())\n"
"    except* TerminateTaskGroup:\n"
"        pass\n"
"\n"
"asyncio.run(main())"
msgstr ""

#: ../../library/asyncio-task.rst:456
msgid "Expected output:"
msgstr "預期的輸出： ::"

#: ../../library/asyncio-task.rst:458
msgid ""
"Task 1: start\n"
"Task 2: start\n"
"Task 1: done"
msgstr ""

#: ../../library/asyncio-task.rst:465
msgid "Sleeping"
msgstr ""

#: ../../library/asyncio-task.rst:469
msgid "Block for *delay* seconds."
msgstr ""

#: ../../library/asyncio-task.rst:471
msgid ""
"If *result* is provided, it is returned to the caller when the coroutine "
"completes."
msgstr ""

#: ../../library/asyncio-task.rst:474
msgid ""
"``sleep()`` always suspends the current task, allowing other tasks to run."
msgstr ""

#: ../../library/asyncio-task.rst:477
msgid ""
"Setting the delay to 0 provides an optimized path to allow other tasks to "
"run. This can be used by long-running functions to avoid blocking the event "
"loop for the full duration of the function call."
msgstr ""

#: ../../library/asyncio-task.rst:483
msgid ""
"Example of coroutine displaying the current date every second for 5 seconds::"
msgstr ""

#: ../../library/asyncio-task.rst:486
msgid ""
"import asyncio\n"
"import datetime\n"
"\n"
"async def display_date():\n"
"    loop = asyncio.get_running_loop()\n"
"    end_time = loop.time() + 5.0\n"
"    while True:\n"
"        print(datetime.datetime.now())\n"
"        if (loop.time() + 1.0) >= end_time:\n"
"            break\n"
"        await asyncio.sleep(1)\n"
"\n"
"asyncio.run(display_date())"
msgstr ""
"import asyncio\n"
"import datetime\n"
"\n"
"async def display_date():\n"
"    loop = asyncio.get_running_loop()\n"
"    end_time = loop.time() + 5.0\n"
"    while True:\n"
"        print(datetime.datetime.now())\n"
"        if (loop.time() + 1.0) >= end_time:\n"
"            break\n"
"        await asyncio.sleep(1)\n"
"\n"
"asyncio.run(display_date())"

#: ../../library/asyncio-task.rst:501 ../../library/asyncio-task.rst:599
#: ../../library/asyncio-task.rst:698 ../../library/asyncio-task.rst:872
#: ../../library/asyncio-task.rst:926 ../../library/asyncio-task.rst:983
msgid "Removed the *loop* parameter."
msgstr "移除 *loop* 參數。"

#: ../../library/asyncio-task.rst:504
msgid "Raises :exc:`ValueError` if *delay* is :data:`~math.nan`."
msgstr ""

#: ../../library/asyncio-task.rst:509
msgid "Running Tasks Concurrently"
msgstr ""

#: ../../library/asyncio-task.rst:513
msgid ""
"Run :ref:`awaitable objects <asyncio-awaitables>` in the *aws* sequence "
"*concurrently*."
msgstr ""

#: ../../library/asyncio-task.rst:516
msgid ""
"If any awaitable in *aws* is a coroutine, it is automatically scheduled as a "
"Task."
msgstr ""

#: ../../library/asyncio-task.rst:519
msgid ""
"If all awaitables are completed successfully, the result is an aggregate "
"list of returned values.  The order of result values corresponds to the "
"order of awaitables in *aws*."
msgstr ""

#: ../../library/asyncio-task.rst:523
msgid ""
"If *return_exceptions* is ``False`` (default), the first raised exception is "
"immediately propagated to the task that awaits on ``gather()``.  Other "
"awaitables in the *aws* sequence **won't be cancelled** and will continue to "
"run."
msgstr ""

#: ../../library/asyncio-task.rst:528
msgid ""
"If *return_exceptions* is ``True``, exceptions are treated the same as "
"successful results, and aggregated in the result list."
msgstr ""

#: ../../library/asyncio-task.rst:531
msgid ""
"If ``gather()`` is *cancelled*, all submitted awaitables (that have not "
"completed yet) are also *cancelled*."
msgstr ""

#: ../../library/asyncio-task.rst:534
msgid ""
"If any Task or Future from the *aws* sequence is *cancelled*, it is treated "
"as if it raised :exc:`CancelledError` -- the ``gather()`` call is **not** "
"cancelled in this case.  This is to prevent the cancellation of one "
"submitted Task/Future to cause other Tasks/Futures to be cancelled."
msgstr ""

#: ../../library/asyncio-task.rst:541
msgid ""
"A new alternative to create and run tasks concurrently and wait for their "
"completion is :class:`asyncio.TaskGroup`. *TaskGroup* provides stronger "
"safety guarantees than *gather* for scheduling a nesting of subtasks: if a "
"task (or a subtask, a task scheduled by a task) raises an exception, "
"*TaskGroup* will, while *gather* will not, cancel the remaining scheduled "
"tasks)."
msgstr ""

#: ../../library/asyncio-task.rst:552
msgid ""
"import asyncio\n"
"\n"
"async def factorial(name, number):\n"
"    f = 1\n"
"    for i in range(2, number + 1):\n"
"        print(f\"Task {name}: Compute factorial({number}), currently i={i}..."
"\")\n"
"        await asyncio.sleep(1)\n"
"        f *= i\n"
"    print(f\"Task {name}: factorial({number}) = {f}\")\n"
"    return f\n"
"\n"
"async def main():\n"
"    # Schedule three calls *concurrently*:\n"
"    L = await asyncio.gather(\n"
"        factorial(\"A\", 2),\n"
"        factorial(\"B\", 3),\n"
"        factorial(\"C\", 4),\n"
"    )\n"
"    print(L)\n"
"\n"
"asyncio.run(main())\n"
"\n"
"# Expected output:\n"
"#\n"
"#     Task A: Compute factorial(2), currently i=2...\n"
"#     Task B: Compute factorial(3), currently i=2...\n"
"#     Task C: Compute factorial(4), currently i=2...\n"
"#     Task A: factorial(2) = 2\n"
"#     Task B: Compute factorial(3), currently i=3...\n"
"#     Task C: Compute factorial(4), currently i=3...\n"
"#     Task B: factorial(3) = 6\n"
"#     Task C: Compute factorial(4), currently i=4...\n"
"#     Task C: factorial(4) = 24\n"
"#     [2, 6, 24]"
msgstr ""

#: ../../library/asyncio-task.rst:588
msgid ""
"If *return_exceptions* is false, cancelling gather() after it has been "
"marked done won't cancel any submitted awaitables. For instance, gather can "
"be marked done after propagating an exception to the caller, therefore, "
"calling ``gather.cancel()`` after catching an exception (raised by one of "
"the awaitables) from gather won't cancel any other awaitables."
msgstr ""

#: ../../library/asyncio-task.rst:595
msgid ""
"If the *gather* itself is cancelled, the cancellation is propagated "
"regardless of *return_exceptions*."
msgstr ""

#: ../../library/asyncio-task.rst:602
msgid ""
"Deprecation warning is emitted if no positional arguments are provided or "
"not all positional arguments are Future-like objects and there is no running "
"event loop."
msgstr ""

#: ../../library/asyncio-task.rst:611
msgid "Eager Task Factory"
msgstr ""

#: ../../library/asyncio-task.rst:615
msgid "A task factory for eager task execution."
msgstr ""

#: ../../library/asyncio-task.rst:617
msgid ""
"When using this factory (via :meth:`loop.set_task_factory(asyncio."
"eager_task_factory) <loop.set_task_factory>`), coroutines begin execution "
"synchronously during :class:`Task` construction. Tasks are only scheduled on "
"the event loop if they block. This can be a performance improvement as the "
"overhead of loop scheduling is avoided for coroutines that complete "
"synchronously."
msgstr ""

#: ../../library/asyncio-task.rst:623
msgid ""
"A common example where this is beneficial is coroutines which employ caching "
"or memoization to avoid actual I/O when possible."
msgstr ""

#: ../../library/asyncio-task.rst:628
msgid ""
"Immediate execution of the coroutine is a semantic change. If the coroutine "
"returns or raises, the task is never scheduled to the event loop. If the "
"coroutine execution blocks, the task is scheduled to the event loop. This "
"change may introduce behavior changes to existing applications. For example, "
"the application's task execution order is likely to change."
msgstr ""

#: ../../library/asyncio-task.rst:639
msgid ""
"Create an eager task factory, similar to :func:`eager_task_factory`, using "
"the provided *custom_task_constructor* when creating a new task instead of "
"the default :class:`Task`."
msgstr ""

#: ../../library/asyncio-task.rst:643
msgid ""
"*custom_task_constructor* must be a *callable* with the signature matching "
"the signature of :class:`Task.__init__ <Task>`. The callable must return a :"
"class:`asyncio.Task`-compatible object."
msgstr ""

#: ../../library/asyncio-task.rst:647
msgid ""
"This function returns a *callable* intended to be used as a task factory of "
"an event loop via :meth:`loop.set_task_factory(factory) <loop."
"set_task_factory>`)."
msgstr ""

#: ../../library/asyncio-task.rst:654
msgid "Shielding From Cancellation"
msgstr ""

#: ../../library/asyncio-task.rst:658
msgid ""
"Protect an :ref:`awaitable object <asyncio-awaitables>` from being :meth:"
"`cancelled <Task.cancel>`."
msgstr ""

#: ../../library/asyncio-task.rst:661 ../../library/asyncio-task.rst:827
msgid "If *aw* is a coroutine it is automatically scheduled as a Task."
msgstr ""

#: ../../library/asyncio-task.rst:663
msgid "The statement::"
msgstr ""

#: ../../library/asyncio-task.rst:665
msgid ""
"task = asyncio.create_task(something())\n"
"res = await shield(task)"
msgstr ""
"task = asyncio.create_task(something())\n"
"res = await shield(task)"

#: ../../library/asyncio-task.rst:668
msgid "is equivalent to::"
msgstr ""

#: ../../library/asyncio-task.rst:670
msgid "res = await something()"
msgstr "res = await something()"

#: ../../library/asyncio-task.rst:672
msgid ""
"*except* that if the coroutine containing it is cancelled, the Task running "
"in ``something()`` is not cancelled.  From the point of view of "
"``something()``, the cancellation did not happen. Although its caller is "
"still cancelled, so the \"await\" expression still raises a :exc:"
"`CancelledError`."
msgstr ""

#: ../../library/asyncio-task.rst:678
msgid ""
"If ``something()`` is cancelled by other means (i.e. from within itself) "
"that would also cancel ``shield()``."
msgstr ""

#: ../../library/asyncio-task.rst:681
msgid ""
"If it is desired to completely ignore cancellation (not recommended) the "
"``shield()`` function should be combined with a try/except clause, as "
"follows::"
msgstr ""

#: ../../library/asyncio-task.rst:685
msgid ""
"task = asyncio.create_task(something())\n"
"try:\n"
"    res = await shield(task)\n"
"except CancelledError:\n"
"    res = None"
msgstr ""
"task = asyncio.create_task(something())\n"
"try:\n"
"    res = await shield(task)\n"
"except CancelledError:\n"
"    res = None"

#: ../../library/asyncio-task.rst:693
msgid ""
"Save a reference to tasks passed to this function, to avoid a task "
"disappearing mid-execution. The event loop only keeps weak references to "
"tasks. A task that isn't referenced elsewhere may get garbage collected at "
"any time, even before it's done."
msgstr ""

#: ../../library/asyncio-task.rst:701
msgid ""
"Deprecation warning is emitted if *aw* is not Future-like object and there "
"is no running event loop."
msgstr ""

#: ../../library/asyncio-task.rst:707
msgid "Timeouts"
msgstr ""

#: ../../library/asyncio-task.rst:711
msgid ""
"Return an :ref:`asynchronous context manager <async-context-managers>` that "
"can be used to limit the amount of time spent waiting on something."
msgstr ""

#: ../../library/asyncio-task.rst:715
msgid ""
"*delay* can either be ``None``, or a float/int number of seconds to wait. If "
"*delay* is ``None``, no time limit will be applied; this can be useful if "
"the delay is unknown when the context manager is created."
msgstr ""

#: ../../library/asyncio-task.rst:720
msgid ""
"In either case, the context manager can be rescheduled after creation using :"
"meth:`Timeout.reschedule`."
msgstr ""

#: ../../library/asyncio-task.rst:725
msgid ""
"async def main():\n"
"    async with asyncio.timeout(10):\n"
"        await long_running_task()"
msgstr ""
"async def main():\n"
"    async with asyncio.timeout(10):\n"
"        await long_running_task()"

#: ../../library/asyncio-task.rst:729
msgid ""
"If ``long_running_task`` takes more than 10 seconds to complete, the context "
"manager will cancel the current task and handle the resulting :exc:`asyncio."
"CancelledError` internally, transforming it into a :exc:`TimeoutError` which "
"can be caught and handled."
msgstr ""

#: ../../library/asyncio-task.rst:736
msgid ""
"The :func:`asyncio.timeout` context manager is what transforms the :exc:"
"`asyncio.CancelledError` into a :exc:`TimeoutError`, which means the :exc:"
"`TimeoutError` can only be caught *outside* of the context manager."
msgstr ""

#: ../../library/asyncio-task.rst:741
msgid "Example of catching :exc:`TimeoutError`::"
msgstr ""

#: ../../library/asyncio-task.rst:743
msgid ""
"async def main():\n"
"    try:\n"
"        async with asyncio.timeout(10):\n"
"            await long_running_task()\n"
"    except TimeoutError:\n"
"        print(\"The long operation timed out, but we've handled it.\")\n"
"\n"
"    print(\"This statement will run regardless.\")"
msgstr ""

#: ../../library/asyncio-task.rst:752
msgid ""
"The context manager produced by :func:`asyncio.timeout` can be rescheduled "
"to a different deadline and inspected."
msgstr ""

#: ../../library/asyncio-task.rst:757
msgid ""
"An :ref:`asynchronous context manager <async-context-managers>` for "
"cancelling overdue coroutines."
msgstr ""

#: ../../library/asyncio-task.rst:760
msgid ""
"``when`` should be an absolute time at which the context should time out, as "
"measured by the event loop's clock:"
msgstr ""

#: ../../library/asyncio-task.rst:763
msgid "If ``when`` is ``None``, the timeout will never trigger."
msgstr ""

#: ../../library/asyncio-task.rst:764
msgid ""
"If ``when < loop.time()``, the timeout will trigger on the next iteration of "
"the event loop."
msgstr ""

#: ../../library/asyncio-task.rst:769
msgid ""
"Return the current deadline, or ``None`` if the current deadline is not set."
msgstr ""

#: ../../library/asyncio-task.rst:774
msgid "Reschedule the timeout."
msgstr ""

#: ../../library/asyncio-task.rst:778
msgid "Return whether the context manager has exceeded its deadline (expired)."
msgstr ""

#: ../../library/asyncio-task.rst:783
msgid ""
"async def main():\n"
"    try:\n"
"        # We do not know the timeout when starting, so we pass ``None``.\n"
"        async with asyncio.timeout(None) as cm:\n"
"            # We know the timeout now, so we reschedule it.\n"
"            new_deadline = get_running_loop().time() + 10\n"
"            cm.reschedule(new_deadline)\n"
"\n"
"            await long_running_task()\n"
"    except TimeoutError:\n"
"        pass\n"
"\n"
"    if cm.expired():\n"
"        print(\"Looks like we haven't finished on time.\")"
msgstr ""

#: ../../library/asyncio-task.rst:798
msgid "Timeout context managers can be safely nested."
msgstr ""

#: ../../library/asyncio-task.rst:804
msgid ""
"Similar to :func:`asyncio.timeout`, except *when* is the absolute time to "
"stop waiting, or ``None``."
msgstr ""

#: ../../library/asyncio-task.rst:809
msgid ""
"async def main():\n"
"    loop = get_running_loop()\n"
"    deadline = loop.time() + 20\n"
"    try:\n"
"        async with asyncio.timeout_at(deadline):\n"
"            await long_running_task()\n"
"    except TimeoutError:\n"
"        print(\"The long operation timed out, but we've handled it.\")\n"
"\n"
"    print(\"This statement will run regardless.\")"
msgstr ""

#: ../../library/asyncio-task.rst:824
msgid ""
"Wait for the *aw* :ref:`awaitable <asyncio-awaitables>` to complete with a "
"timeout."
msgstr ""

#: ../../library/asyncio-task.rst:829
msgid ""
"*timeout* can either be ``None`` or a float or int number of seconds to wait "
"for.  If *timeout* is ``None``, block until the future completes."
msgstr ""

#: ../../library/asyncio-task.rst:833
msgid ""
"If a timeout occurs, it cancels the task and raises :exc:`TimeoutError`."
msgstr ""

#: ../../library/asyncio-task.rst:836
msgid ""
"To avoid the task :meth:`cancellation <Task.cancel>`, wrap it in :func:"
"`shield`."
msgstr ""

#: ../../library/asyncio-task.rst:839
msgid ""
"The function will wait until the future is actually cancelled, so the total "
"wait time may exceed the *timeout*. If an exception happens during "
"cancellation, it is propagated."
msgstr ""

#: ../../library/asyncio-task.rst:843
msgid "If the wait is cancelled, the future *aw* is also cancelled."
msgstr ""

#: ../../library/asyncio-task.rst:849
msgid ""
"async def eternity():\n"
"    # Sleep for one hour\n"
"    await asyncio.sleep(3600)\n"
"    print('yay!')\n"
"\n"
"async def main():\n"
"    # Wait for at most 1 second\n"
"    try:\n"
"        await asyncio.wait_for(eternity(), timeout=1.0)\n"
"    except TimeoutError:\n"
"        print('timeout!')\n"
"\n"
"asyncio.run(main())\n"
"\n"
"# Expected output:\n"
"#\n"
"#     timeout!"
msgstr ""

#: ../../library/asyncio-task.rst:867
msgid ""
"When *aw* is cancelled due to a timeout, ``wait_for`` waits for *aw* to be "
"cancelled.  Previously, it raised :exc:`TimeoutError` immediately."
msgstr ""

#: ../../library/asyncio-task.rst:875
msgid "Raises :exc:`TimeoutError` instead of :exc:`asyncio.TimeoutError`."
msgstr "引發 :exc:`TimeoutError` 而不是 :exc:`asyncio.TimeoutError`。"

#: ../../library/asyncio-task.rst:880
msgid "Waiting Primitives"
msgstr ""

#: ../../library/asyncio-task.rst:884
msgid ""
"Run :class:`~asyncio.Future` and :class:`~asyncio.Task` instances in the "
"*aws* iterable concurrently and block until the condition specified by "
"*return_when*."
msgstr ""

#: ../../library/asyncio-task.rst:888
msgid "The *aws* iterable must not be empty."
msgstr ""

#: ../../library/asyncio-task.rst:890
msgid "Returns two sets of Tasks/Futures: ``(done, pending)``."
msgstr ""

#: ../../library/asyncio-task.rst:892
msgid "Usage::"
msgstr "用法： ::"

#: ../../library/asyncio-task.rst:894
msgid "done, pending = await asyncio.wait(aws)"
msgstr "done, pending = await asyncio.wait(aws)"

#: ../../library/asyncio-task.rst:896
msgid ""
"*timeout* (a float or int), if specified, can be used to control the maximum "
"number of seconds to wait before returning."
msgstr ""

#: ../../library/asyncio-task.rst:899
msgid ""
"Note that this function does not raise :exc:`TimeoutError`. Futures or Tasks "
"that aren't done when the timeout occurs are simply returned in the second "
"set."
msgstr ""

#: ../../library/asyncio-task.rst:903
msgid ""
"*return_when* indicates when this function should return.  It must be one of "
"the following constants:"
msgstr ""

#: ../../library/asyncio-task.rst:909
msgid "Constant"
msgstr "常數"

#: ../../library/asyncio-task.rst:910
msgid "Description"
msgstr "描述"

#: ../../library/asyncio-task.rst:913
msgid "The function will return when any future finishes or is cancelled."
msgstr ""

#: ../../library/asyncio-task.rst:916
msgid ""
"The function will return when any future finishes by raising an exception. "
"If no future raises an exception then it is equivalent to :const:"
"`ALL_COMPLETED`."
msgstr ""

#: ../../library/asyncio-task.rst:921
msgid "The function will return when all futures finish or are cancelled."
msgstr ""

#: ../../library/asyncio-task.rst:923
msgid ""
"Unlike :func:`~asyncio.wait_for`, ``wait()`` does not cancel the futures "
"when a timeout occurs."
msgstr ""

#: ../../library/asyncio-task.rst:929
msgid "Passing coroutine objects to ``wait()`` directly is forbidden."
msgstr ""

#: ../../library/asyncio-task.rst:932 ../../library/asyncio-task.rst:990
msgid "Added support for generators yielding tasks."
msgstr ""

#: ../../library/asyncio-task.rst:938
msgid ""
"Run :ref:`awaitable objects <asyncio-awaitables>` in the *aws* iterable "
"concurrently. The returned object can be iterated to obtain the results of "
"the awaitables as they finish."
msgstr ""

#: ../../library/asyncio-task.rst:942
msgid ""
"The object returned by ``as_completed()`` can be iterated as an :term:"
"`asynchronous iterator` or a plain :term:`iterator`. When asynchronous "
"iteration is used, the originally-supplied awaitables are yielded if they "
"are tasks or futures. This makes it easy to correlate previously-scheduled "
"tasks with their results. Example::"
msgstr ""

#: ../../library/asyncio-task.rst:948
msgid ""
"ipv4_connect = create_task(open_connection(\"127.0.0.1\", 80))\n"
"ipv6_connect = create_task(open_connection(\"::1\", 80))\n"
"tasks = [ipv4_connect, ipv6_connect]\n"
"\n"
"async for earliest_connect in as_completed(tasks):\n"
"    # earliest_connect is done. The result can be obtained by\n"
"    # awaiting it or calling earliest_connect.result()\n"
"    reader, writer = await earliest_connect\n"
"\n"
"    if earliest_connect is ipv6_connect:\n"
"        print(\"IPv6 connection established.\")\n"
"    else:\n"
"        print(\"IPv4 connection established.\")"
msgstr ""

#: ../../library/asyncio-task.rst:962
msgid ""
"During asynchronous iteration, implicitly-created tasks will be yielded for "
"supplied awaitables that aren't tasks or futures."
msgstr ""

#: ../../library/asyncio-task.rst:965
msgid ""
"When used as a plain iterator, each iteration yields a new coroutine that "
"returns the result or raises the exception of the next completed awaitable. "
"This pattern is compatible with Python versions older than 3.13::"
msgstr ""

#: ../../library/asyncio-task.rst:969
msgid ""
"ipv4_connect = create_task(open_connection(\"127.0.0.1\", 80))\n"
"ipv6_connect = create_task(open_connection(\"::1\", 80))\n"
"tasks = [ipv4_connect, ipv6_connect]\n"
"\n"
"for next_connect in as_completed(tasks):\n"
"    # next_connect is not one of the original task objects. It must be\n"
"    # awaited to obtain the result value or raise the exception of the\n"
"    # awaitable that finishes next.\n"
"    reader, writer = await next_connect"
msgstr ""

#: ../../library/asyncio-task.rst:979
msgid ""
"A :exc:`TimeoutError` is raised if the timeout occurs before all awaitables "
"are done. This is raised by the ``async for`` loop during asynchronous "
"iteration or by the coroutines yielded during plain iteration."
msgstr ""

#: ../../library/asyncio-task.rst:986
msgid ""
"Deprecation warning is emitted if not all awaitable objects in the *aws* "
"iterable are Future-like objects and there is no running event loop."
msgstr ""

#: ../../library/asyncio-task.rst:993
msgid ""
"The result can now be used as either an :term:`asynchronous iterator` or as "
"a plain :term:`iterator` (previously it was only a plain iterator)."
msgstr ""

#: ../../library/asyncio-task.rst:999
msgid "Running in Threads"
msgstr ""

#: ../../library/asyncio-task.rst:1003
msgid "Asynchronously run function *func* in a separate thread."
msgstr ""

#: ../../library/asyncio-task.rst:1005
msgid ""
"Any \\*args and \\*\\*kwargs supplied for this function are directly passed "
"to *func*. Also, the current :class:`contextvars.Context` is propagated, "
"allowing context variables from the event loop thread to be accessed in the "
"separate thread."
msgstr ""

#: ../../library/asyncio-task.rst:1010
msgid ""
"Return a coroutine that can be awaited to get the eventual result of *func*."
msgstr ""

#: ../../library/asyncio-task.rst:1012
msgid ""
"This coroutine function is primarily intended to be used for executing IO-"
"bound functions/methods that would otherwise block the event loop if they "
"were run in the main thread. For example::"
msgstr ""

#: ../../library/asyncio-task.rst:1016
msgid ""
"def blocking_io():\n"
"    print(f\"start blocking_io at {time.strftime('%X')}\")\n"
"    # Note that time.sleep() can be replaced with any blocking\n"
"    # IO-bound operation, such as file operations.\n"
"    time.sleep(1)\n"
"    print(f\"blocking_io complete at {time.strftime('%X')}\")\n"
"\n"
"async def main():\n"
"    print(f\"started main at {time.strftime('%X')}\")\n"
"\n"
"    await asyncio.gather(\n"
"        asyncio.to_thread(blocking_io),\n"
"        asyncio.sleep(1))\n"
"\n"
"    print(f\"finished main at {time.strftime('%X')}\")\n"
"\n"
"\n"
"asyncio.run(main())\n"
"\n"
"# Expected output:\n"
"#\n"
"# started main at 19:50:53\n"
"# start blocking_io at 19:50:53\n"
"# blocking_io complete at 19:50:54\n"
"# finished main at 19:50:54"
msgstr ""

#: ../../library/asyncio-task.rst:1042
msgid ""
"Directly calling ``blocking_io()`` in any coroutine would block the event "
"loop for its duration, resulting in an additional 1 second of run time. "
"Instead, by using ``asyncio.to_thread()``, we can run it in a separate "
"thread without blocking the event loop."
msgstr ""

#: ../../library/asyncio-task.rst:1049
msgid ""
"Due to the :term:`GIL`, ``asyncio.to_thread()`` can typically only be used "
"to make IO-bound functions non-blocking. However, for extension modules that "
"release the GIL or alternative Python implementations that don't have one, "
"``asyncio.to_thread()`` can also be used for CPU-bound functions."
msgstr ""

#: ../../library/asyncio-task.rst:1058
msgid "Scheduling From Other Threads"
msgstr ""

#: ../../library/asyncio-task.rst:1062
msgid "Submit a coroutine to the given event loop.  Thread-safe."
msgstr ""

#: ../../library/asyncio-task.rst:1064
msgid ""
"Return a :class:`concurrent.futures.Future` to wait for the result from "
"another OS thread."
msgstr ""

#: ../../library/asyncio-task.rst:1067
msgid ""
"This function is meant to be called from a different OS thread than the one "
"where the event loop is running.  Example::"
msgstr ""

#: ../../library/asyncio-task.rst:1070
msgid ""
"# Create a coroutine\n"
"coro = asyncio.sleep(1, result=3)\n"
"\n"
"# Submit the coroutine to a given loop\n"
"future = asyncio.run_coroutine_threadsafe(coro, loop)\n"
"\n"
"# Wait for the result with an optional timeout argument\n"
"assert future.result(timeout) == 3"
msgstr ""

#: ../../library/asyncio-task.rst:1079
msgid ""
"If an exception is raised in the coroutine, the returned Future will be "
"notified.  It can also be used to cancel the task in the event loop::"
msgstr ""

#: ../../library/asyncio-task.rst:1083
msgid ""
"try:\n"
"    result = future.result(timeout)\n"
"except TimeoutError:\n"
"    print('The coroutine took too long, cancelling the task...')\n"
"    future.cancel()\n"
"except Exception as exc:\n"
"    print(f'The coroutine raised an exception: {exc!r}')\n"
"else:\n"
"    print(f'The coroutine returned: {result!r}')"
msgstr ""

#: ../../library/asyncio-task.rst:1093
msgid ""
"See the :ref:`concurrency and multithreading <asyncio-multithreading>` "
"section of the documentation."
msgstr ""

#: ../../library/asyncio-task.rst:1096
msgid ""
"Unlike other asyncio functions this function requires the *loop* argument to "
"be passed explicitly."
msgstr ""

#: ../../library/asyncio-task.rst:1103
msgid "Introspection"
msgstr ""

#: ../../library/asyncio-task.rst:1108
msgid ""
"Return the currently running :class:`Task` instance, or ``None`` if no task "
"is running."
msgstr ""

#: ../../library/asyncio-task.rst:1111
msgid ""
"If *loop* is ``None`` :func:`get_running_loop` is used to get the current "
"loop."
msgstr ""

#: ../../library/asyncio-task.rst:1119
msgid "Return a set of not yet finished :class:`Task` objects run by the loop."
msgstr ""

#: ../../library/asyncio-task.rst:1122
msgid ""
"If *loop* is ``None``, :func:`get_running_loop` is used for getting current "
"loop."
msgstr ""

#: ../../library/asyncio-task.rst:1130
msgid "Return ``True`` if *obj* is a coroutine object."
msgstr ""

#: ../../library/asyncio-task.rst:1136
msgid "Task Object"
msgstr ""

#: ../../library/asyncio-task.rst:1140
msgid ""
"A :class:`Future-like <Future>` object that runs a Python :ref:`coroutine "
"<coroutine>`.  Not thread-safe."
msgstr ""

#: ../../library/asyncio-task.rst:1143
msgid ""
"Tasks are used to run coroutines in event loops. If a coroutine awaits on a "
"Future, the Task suspends the execution of the coroutine and waits for the "
"completion of the Future.  When the Future is *done*, the execution of the "
"wrapped coroutine resumes."
msgstr ""

#: ../../library/asyncio-task.rst:1149
msgid ""
"Event loops use cooperative scheduling: an event loop runs one Task at a "
"time.  While a Task awaits for the completion of a Future, the event loop "
"runs other Tasks, callbacks, or performs IO operations."
msgstr ""

#: ../../library/asyncio-task.rst:1154
msgid ""
"Use the high-level :func:`asyncio.create_task` function to create Tasks, or "
"the low-level :meth:`loop.create_task` or :func:`ensure_future` functions.  "
"Manual instantiation of Tasks is discouraged."
msgstr ""

#: ../../library/asyncio-task.rst:1159
msgid ""
"To cancel a running Task use the :meth:`cancel` method.  Calling it will "
"cause the Task to throw a :exc:`CancelledError` exception into the wrapped "
"coroutine.  If a coroutine is awaiting on a Future object during "
"cancellation, the Future object will be cancelled."
msgstr ""

#: ../../library/asyncio-task.rst:1164
msgid ""
":meth:`cancelled` can be used to check if the Task was cancelled. The method "
"returns ``True`` if the wrapped coroutine did not suppress the :exc:"
"`CancelledError` exception and was actually cancelled."
msgstr ""

#: ../../library/asyncio-task.rst:1169
msgid ""
":class:`asyncio.Task` inherits from :class:`Future` all of its APIs except :"
"meth:`Future.set_result` and :meth:`Future.set_exception`."
msgstr ""

#: ../../library/asyncio-task.rst:1173
msgid ""
"An optional keyword-only *context* argument allows specifying a custom :"
"class:`contextvars.Context` for the *coro* to run in. If no *context* is "
"provided, the Task copies the current context and later runs its coroutine "
"in the copied context."
msgstr ""

#: ../../library/asyncio-task.rst:1178
msgid ""
"An optional keyword-only *eager_start* argument allows eagerly starting the "
"execution of the :class:`asyncio.Task` at task creation time. If set to "
"``True`` and the event loop is running, the task will start executing the "
"coroutine immediately, until the first time the coroutine blocks. If the "
"coroutine returns or raises without blocking, the task will be finished "
"eagerly and will skip scheduling to the event loop."
msgstr ""

#: ../../library/asyncio-task.rst:1185
msgid "Added support for the :mod:`contextvars` module."
msgstr ""

#: ../../library/asyncio-task.rst:1191
msgid ""
"Deprecation warning is emitted if *loop* is not specified and there is no "
"running event loop."
msgstr ""

#: ../../library/asyncio-task.rst:1198
msgid "Added the *eager_start* parameter."
msgstr "新增 *eager_start* 參數。"

#: ../../library/asyncio-task.rst:1203
msgid "Return ``True`` if the Task is *done*."
msgstr ""

#: ../../library/asyncio-task.rst:1205
msgid ""
"A Task is *done* when the wrapped coroutine either returned a value, raised "
"an exception, or the Task was cancelled."
msgstr ""

#: ../../library/asyncio-task.rst:1210
msgid "Return the result of the Task."
msgstr ""

#: ../../library/asyncio-task.rst:1212
msgid ""
"If the Task is *done*, the result of the wrapped coroutine is returned (or "
"if the coroutine raised an exception, that exception is re-raised.)"
msgstr ""

#: ../../library/asyncio-task.rst:1216 ../../library/asyncio-task.rst:1230
msgid ""
"If the Task has been *cancelled*, this method raises a :exc:`CancelledError` "
"exception."
msgstr ""

#: ../../library/asyncio-task.rst:1219
msgid ""
"If the Task's result isn't yet available, this method raises an :exc:"
"`InvalidStateError` exception."
msgstr ""

#: ../../library/asyncio-task.rst:1224
msgid "Return the exception of the Task."
msgstr ""

#: ../../library/asyncio-task.rst:1226
msgid ""
"If the wrapped coroutine raised an exception that exception is returned.  If "
"the wrapped coroutine returned normally this method returns ``None``."
msgstr ""

#: ../../library/asyncio-task.rst:1233
msgid ""
"If the Task isn't *done* yet, this method raises an :exc:`InvalidStateError` "
"exception."
msgstr ""

#: ../../library/asyncio-task.rst:1238
msgid "Add a callback to be run when the Task is *done*."
msgstr ""

#: ../../library/asyncio-task.rst:1240 ../../library/asyncio-task.rst:1249
msgid "This method should only be used in low-level callback-based code."
msgstr ""

#: ../../library/asyncio-task.rst:1242
msgid ""
"See the documentation of :meth:`Future.add_done_callback` for more details."
msgstr ""

#: ../../library/asyncio-task.rst:1247
msgid "Remove *callback* from the callbacks list."
msgstr ""

#: ../../library/asyncio-task.rst:1251
msgid ""
"See the documentation of :meth:`Future.remove_done_callback` for more "
"details."
msgstr ""

#: ../../library/asyncio-task.rst:1256
msgid "Return the list of stack frames for this Task."
msgstr ""

#: ../../library/asyncio-task.rst:1258
msgid ""
"If the wrapped coroutine is not done, this returns the stack where it is "
"suspended.  If the coroutine has completed successfully or was cancelled, "
"this returns an empty list. If the coroutine was terminated by an exception, "
"this returns the list of traceback frames."
msgstr ""

#: ../../library/asyncio-task.rst:1264
msgid "The frames are always ordered from oldest to newest."
msgstr ""

#: ../../library/asyncio-task.rst:1266
msgid "Only one stack frame is returned for a suspended coroutine."
msgstr ""

#: ../../library/asyncio-task.rst:1268
msgid ""
"The optional *limit* argument sets the maximum number of frames to return; "
"by default all available frames are returned. The ordering of the returned "
"list differs depending on whether a stack or a traceback is returned: the "
"newest frames of a stack are returned, but the oldest frames of a traceback "
"are returned.  (This matches the behavior of the traceback module.)"
msgstr ""

#: ../../library/asyncio-task.rst:1277
msgid "Print the stack or traceback for this Task."
msgstr ""

#: ../../library/asyncio-task.rst:1279
msgid ""
"This produces output similar to that of the traceback module for the frames "
"retrieved by :meth:`get_stack`."
msgstr ""

#: ../../library/asyncio-task.rst:1282
msgid "The *limit* argument is passed to :meth:`get_stack` directly."
msgstr ""

#: ../../library/asyncio-task.rst:1284
msgid ""
"The *file* argument is an I/O stream to which the output is written; by "
"default output is written to :data:`sys.stdout`."
msgstr ""

#: ../../library/asyncio-task.rst:1289
msgid "Return the coroutine object wrapped by the :class:`Task`."
msgstr ""

#: ../../library/asyncio-task.rst:1293
msgid ""
"This will return ``None`` for Tasks which have already completed eagerly. "
"See the :ref:`Eager Task Factory <eager-task-factory>`."
msgstr ""

#: ../../library/asyncio-task.rst:1300
msgid "Newly added eager task execution means result may be ``None``."
msgstr ""

#: ../../library/asyncio-task.rst:1304
msgid ""
"Return the :class:`contextvars.Context` object associated with the task."
msgstr ""

#: ../../library/asyncio-task.rst:1311
msgid "Return the name of the Task."
msgstr ""

#: ../../library/asyncio-task.rst:1313
msgid ""
"If no name has been explicitly assigned to the Task, the default asyncio "
"Task implementation generates a default name during instantiation."
msgstr ""

#: ../../library/asyncio-task.rst:1321
msgid "Set the name of the Task."
msgstr ""

#: ../../library/asyncio-task.rst:1323
msgid ""
"The *value* argument can be any object, which is then converted to a string."
msgstr ""

#: ../../library/asyncio-task.rst:1326
msgid ""
"In the default Task implementation, the name will be visible in the :func:"
"`repr` output of a task object."
msgstr ""

#: ../../library/asyncio-task.rst:1333
msgid "Request the Task to be cancelled."
msgstr ""

#: ../../library/asyncio-task.rst:1335
msgid ""
"This arranges for a :exc:`CancelledError` exception to be thrown into the "
"wrapped coroutine on the next cycle of the event loop."
msgstr ""

#: ../../library/asyncio-task.rst:1338
msgid ""
"The coroutine then has a chance to clean up or even deny the request by "
"suppressing the exception with a :keyword:`try` ... ... ``except "
"CancelledError`` ... :keyword:`finally` block. Therefore, unlike :meth:"
"`Future.cancel`, :meth:`Task.cancel` does not guarantee that the Task will "
"be cancelled, although suppressing cancellation completely is not common and "
"is actively discouraged.  Should the coroutine nevertheless decide to "
"suppress the cancellation, it needs to call :meth:`Task.uncancel` in "
"addition to catching the exception."
msgstr ""

#: ../../library/asyncio-task.rst:1348
msgid "Added the *msg* parameter."
msgstr "新增 *msg* 參數。"

#: ../../library/asyncio-task.rst:1351
msgid "The ``msg`` parameter is propagated from cancelled task to its awaiter."
msgstr ""

#: ../../library/asyncio-task.rst:1356
msgid ""
"The following example illustrates how coroutines can intercept the "
"cancellation request::"
msgstr ""

#: ../../library/asyncio-task.rst:1359
msgid ""
"async def cancel_me():\n"
"    print('cancel_me(): before sleep')\n"
"\n"
"    try:\n"
"        # Wait for 1 hour\n"
"        await asyncio.sleep(3600)\n"
"    except asyncio.CancelledError:\n"
"        print('cancel_me(): cancel sleep')\n"
"        raise\n"
"    finally:\n"
"        print('cancel_me(): after sleep')\n"
"\n"
"async def main():\n"
"    # Create a \"cancel_me\" Task\n"
"    task = asyncio.create_task(cancel_me())\n"
"\n"
"    # Wait for 1 second\n"
"    await asyncio.sleep(1)\n"
"\n"
"    task.cancel()\n"
"    try:\n"
"        await task\n"
"    except asyncio.CancelledError:\n"
"        print(\"main(): cancel_me is cancelled now\")\n"
"\n"
"asyncio.run(main())\n"
"\n"
"# Expected output:\n"
"#\n"
"#     cancel_me(): before sleep\n"
"#     cancel_me(): cancel sleep\n"
"#     cancel_me(): after sleep\n"
"#     main(): cancel_me is cancelled now"
msgstr ""

#: ../../library/asyncio-task.rst:1395
msgid "Return ``True`` if the Task is *cancelled*."
msgstr ""

#: ../../library/asyncio-task.rst:1397
msgid ""
"The Task is *cancelled* when the cancellation was requested with :meth:"
"`cancel` and the wrapped coroutine propagated the :exc:`CancelledError` "
"exception thrown into it."
msgstr ""

#: ../../library/asyncio-task.rst:1403
msgid "Decrement the count of cancellation requests to this Task."
msgstr ""

#: ../../library/asyncio-task.rst:1405
msgid "Returns the remaining number of cancellation requests."
msgstr ""

#: ../../library/asyncio-task.rst:1407
msgid ""
"Note that once execution of a cancelled task completed, further calls to :"
"meth:`uncancel` are ineffective."
msgstr ""

#: ../../library/asyncio-task.rst:1412
msgid ""
"This method is used by asyncio's internals and isn't expected to be used by "
"end-user code.  In particular, if a Task gets successfully uncancelled, this "
"allows for elements of structured concurrency like :ref:`taskgroups` and :"
"func:`asyncio.timeout` to continue running, isolating cancellation to the "
"respective structured block. For example::"
msgstr ""

#: ../../library/asyncio-task.rst:1419
msgid ""
"async def make_request_with_timeout():\n"
"    try:\n"
"        async with asyncio.timeout(1):\n"
"            # Structured block affected by the timeout:\n"
"            await make_request()\n"
"            await make_another_request()\n"
"    except TimeoutError:\n"
"        log(\"There was a timeout\")\n"
"    # Outer code not affected by the timeout:\n"
"    await unrelated_code()"
msgstr ""

#: ../../library/asyncio-task.rst:1430
msgid ""
"While the block with ``make_request()`` and ``make_another_request()`` might "
"get cancelled due to the timeout, ``unrelated_code()`` should continue "
"running even in case of the timeout.  This is implemented with :meth:"
"`uncancel`.  :class:`TaskGroup` context managers use :func:`uncancel` in a "
"similar fashion."
msgstr ""

#: ../../library/asyncio-task.rst:1436
msgid ""
"If end-user code is, for some reason, suppressing cancellation by catching :"
"exc:`CancelledError`, it needs to call this method to remove the "
"cancellation state."
msgstr ""

#: ../../library/asyncio-task.rst:1440
msgid ""
"When this method decrements the cancellation count to zero, the method "
"checks if a previous :meth:`cancel` call had arranged for :exc:"
"`CancelledError` to be thrown into the task. If it hasn't been thrown yet, "
"that arrangement will be rescinded (by resetting the internal "
"``_must_cancel`` flag)."
msgstr ""

#: ../../library/asyncio-task.rst:1446
msgid "Changed to rescind pending cancellation requests upon reaching zero."
msgstr ""

#: ../../library/asyncio-task.rst:1451
msgid ""
"Return the number of pending cancellation requests to this Task, i.e., the "
"number of calls to :meth:`cancel` less the number of :meth:`uncancel` calls."
msgstr ""

#: ../../library/asyncio-task.rst:1455
msgid ""
"Note that if this number is greater than zero but the Task is still "
"executing, :meth:`cancelled` will still return ``False``. This is because "
"this number can be lowered by calling :meth:`uncancel`, which can lead to "
"the task not being cancelled after all if the cancellation requests go down "
"to zero."
msgstr ""

#: ../../library/asyncio-task.rst:1461
msgid ""
"This method is used by asyncio's internals and isn't expected to be used by "
"end-user code.  See :meth:`uncancel` for more details."
msgstr ""

#~ msgid ""
#~ "for coro in as_completed(aws):\n"
#~ "    earliest_result = await coro\n"
#~ "    # ..."
#~ msgstr ""
#~ "for coro in as_completed(aws):\n"
#~ "    earliest_result = await coro\n"
#~ "    # ..."

#~ msgid ":const:`FIRST_COMPLETED`"
#~ msgstr ":const:`FIRST_COMPLETED`"

#~ msgid ":const:`FIRST_EXCEPTION`"
#~ msgstr ":const:`FIRST_EXCEPTION`"

#~ msgid ":const:`ALL_COMPLETED`"
#~ msgstr ":const:`ALL_COMPLETED`"