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# SOME DESCRIPTIVE TITLE.
# Copyright (C) 2001 Python Software Foundation
# This file is distributed under the same license as the Python package.
# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
#
# Translators:
# Bhuvansh Kataria, 2026
#
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: Python 3.15\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2026-08-09 14:27+0000\n"
"PO-Revision-Date: 2025-09-16 00:00+0000\n"
"Last-Translator: Bhuvansh Kataria, 2026\n"
"Language-Team: Panjabi (Punjabi) (https://app.transifex.com/python-doc/"
"teams/5390/pa/)\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Language: pa\n"
"Plural-Forms: nplurals=2; plural=(n != 1);\n"
msgid "Coroutines and tasks"
msgstr ""
msgid ""
"This section outlines high-level asyncio APIs to work with coroutines and "
"Tasks."
msgstr ""
msgid "Coroutines"
msgstr ""
msgid "**Source code:** :source:`Lib/asyncio/coroutines.py`"
msgstr ""
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 ""
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 ""
msgid ""
"Note that simply calling a coroutine will not schedule it to be executed::"
msgstr ""
msgid ""
">>> main()\n"
"<coroutine object main at 0x1053bb7c8>"
msgstr ""
msgid "To actually run a coroutine, asyncio provides the following mechanisms:"
msgstr ""
msgid ""
"The :func:`asyncio.run` function to run the top-level entry point \"main()\" "
"function (see the above example.)"
msgstr ""
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 ""
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 ""
msgid "Expected output::"
msgstr ""
msgid ""
"started at 17:13:52\n"
"hello\n"
"world\n"
"finished at 17:13:55"
msgstr ""
msgid ""
"The :func:`asyncio.create_task` function to run coroutines concurrently as "
"asyncio :class:`Tasks <Task>`."
msgstr ""
msgid ""
"Let's modify the above example and run two ``say_after`` coroutines "
"*concurrently*::"
msgstr ""
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 ""
msgid ""
"Note that expected output now shows that the snippet runs 1 second faster "
"than before::"
msgstr ""
msgid ""
"started at 17:14:32\n"
"hello\n"
"world\n"
"finished at 17:14:34"
msgstr ""
msgid ""
"The :class:`asyncio.TaskGroup` class provides a more modern alternative to :"
"func:`create_task`. Using this API, the last example becomes::"
msgstr ""
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 ""
msgid "The timing and output should be the same as for the previous version."
msgstr ""
msgid ":class:`asyncio.TaskGroup`."
msgstr ""
msgid "Awaitables"
msgstr ""
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 ""
msgid ""
"There are three main types of *awaitable* objects: **coroutines**, "
"**Tasks**, and **Futures**."
msgstr ""
msgid ""
"Python coroutines are *awaitables* and therefore can be awaited from other "
"coroutines::"
msgstr ""
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 ""
msgid ""
"In this documentation the term \"coroutine\" can be used for two closely "
"related concepts:"
msgstr ""
msgid "a *coroutine function*: an :keyword:`async def` function;"
msgstr ""
msgid ""
"a *coroutine object*: an object returned by calling a *coroutine function*."
msgstr ""
msgid "Tasks"
msgstr ""
msgid "*Tasks* are used to schedule coroutines *concurrently*."
msgstr ""
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 ""
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 ""
msgid "Futures"
msgstr ""
msgid ""
"A :class:`Future` is a special **low-level** awaitable object that "
"represents an **eventual result** of an asynchronous operation."
msgstr ""
msgid ""
"When a Future object is *awaited* it means that the coroutine will wait "
"until the Future is resolved in some other place."
msgstr ""
msgid ""
"Future objects in asyncio are needed to allow callback-based code to be used "
"with async/await."
msgstr ""
msgid ""
"Normally **there is no need** to create Future objects at the application "
"level code."
msgstr ""
msgid ""
"Future objects, sometimes exposed by libraries and some asyncio APIs, can be "
"awaited::"
msgstr ""
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 ""
msgid ""
"A good example of a low-level function that returns a Future object is :meth:"
"`loop.run_in_executor`."
msgstr ""
msgid "Creating tasks"
msgstr ""
msgid "**Source code:** :source:`Lib/asyncio/tasks.py`"
msgstr ""
msgid ""
"Wrap the *coro* :ref:`coroutine <coroutine>` into a :class:`Task` and "
"schedule its execution. Return the Task object."
msgstr ""
msgid ""
"The full function signature is largely the same as that of the :class:`Task` "
"constructor (or factory) - all of the keyword arguments to this function are "
"passed through to that interface."
msgstr ""
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 ""
msgid ""
"An optional keyword-only *eager_start* argument allows specifying if the "
"task should execute eagerly during the call to create_task, or be scheduled "
"later. If *eager_start* is not passed the mode set by :meth:`loop."
"set_task_factory` will be used."
msgstr ""
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 ""
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 ""
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 ""
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 ""
msgid ""
"Note that this approach never awaits the tasks, so if a task fails, its "
"exception is never retrieved and asyncio logs a \"Task exception was never "
"retrieved\" message when the task is garbage collected. To avoid this, use :"
"class:`asyncio.TaskGroup` which keeps a strong reference to each task, "
"awaits them and propagates their exceptions::"
msgstr ""
msgid ""
"async with asyncio.TaskGroup() as tg:\n"
" for i in range(10):\n"
" tg.create_task(some_coro(param=i))"
msgstr ""
msgid "Added the *name* parameter."
msgstr ""
msgid "Added the *context* parameter."
msgstr ""
msgid "Added the *eager_start* parameter by passing on all *kwargs*."
msgstr ""
msgid "Task cancellation"
msgstr ""
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 ""
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 ""
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 ""
msgid "Task groups"
msgstr ""
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 ""
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 ""
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 ""
msgid "Close the given coroutine if the task group is not active."
msgstr ""
msgid "Passes on all *kwargs* to :meth:`loop.create_task`"
msgstr ""
msgid ""
"Cancel the task group. This is a non-exceptional, early exit of the task "
"group's lifetime -- useful once the group's goal has been met or its "
"services no longer needed."
msgstr ""
msgid ""
":meth:`~asyncio.Task.cancel` will be called on any tasks in the group that "
"aren't yet done, as well as the parent (body) of the group. The task group "
"context manager will exit *without* :exc:`asyncio.CancelledError` being "
"raised."
msgstr ""
msgid ""
"If :meth:`cancel` is called before entering the task group, the group will "
"be cancelled upon entry. This is useful for patterns where one piece of "
"code passes an unused :class:`asyncio.TaskGroup` instance to another in "
"order to have the ability to cancel anything run within the group."
msgstr ""
msgid ""
":meth:`cancel` is idempotent and may be called after the task group has "
"already exited."
msgstr ""
msgid "Some ways to use :meth:`cancel`:"
msgstr ""
msgid "call it from the task group body based on some condition or event"
msgstr ""
msgid ""
"pass the task group instance to child tasks via :meth:`create_task`, "
"allowing a child task to conditionally cancel the entire group"
msgstr ""
msgid ""
"pass the task group instance or bound :meth:`cancel` method to some other "
"task *before* opening the task group, allowing remote cancellation"
msgstr ""
msgid "Example::"
msgstr ""
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 ""
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). There is also opportunity to request termination of the "
"entire task group with ``tg.cancel()``, based on some condition. Once the "
"last task has finished and the ``async with`` block is exited, no new tasks "
"may be added to the group."
msgstr ""
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 ""
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 ""
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 ""
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. "
"There is an additional special case made only for the body of the ``async "
"with``: if it raises :exc:`GeneratorExit` and none of the other tasks raise "
"exceptions that would be reported, then the :exc:`GeneratorExit` is reraised."
msgstr ""
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 ""
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 ""
msgid ""
"Task groups preserve the cancellation count reported by :meth:`asyncio.Task."
"cancelling`."
msgstr ""
msgid ""
"Improved handling of simultaneous internal and external cancellations and "
"correct preservation of cancellation counts."
msgstr ""
msgid "Addition of the special case for :exc:`GeneratorExit`."
msgstr ""
msgid "Sleeping"
msgstr ""
msgid "Block for *delay* seconds."
msgstr ""
msgid ""
"If *result* is provided, it is returned to the caller when the coroutine "
"completes."
msgstr ""
msgid ""
"``sleep()`` always suspends the current task, allowing other tasks to run."
msgstr ""
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 ""
msgid ""
"Example of coroutine displaying the current date every second for 5 seconds::"
msgstr ""
msgid ""
"import asyncio\n"
"import datetime as dt\n"
"\n"
"async def display_date():\n"
" loop = asyncio.get_running_loop()\n"
" end_time = loop.time() + 5.0\n"
" while True:\n"
" print(dt.datetime.now())\n"
" if (loop.time() + 1.0) >= end_time:\n"
" break\n"
" await asyncio.sleep(1)\n"
"\n"
"asyncio.run(display_date())"
msgstr ""
msgid "Removed the *loop* parameter."
msgstr ""
msgid "Raises :exc:`ValueError` if *delay* is :data:`~math.nan`."
msgstr ""
msgid "Running tasks concurrently"
msgstr ""
msgid ""
"Run :ref:`awaitable objects <asyncio-awaitables>` in the *aws* sequence "
"*concurrently*."
msgstr ""
msgid ""
"If any awaitable in *aws* is a coroutine, it is automatically scheduled as a "
"Task."
msgstr ""
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 ""
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 ""
msgid ""
"If *return_exceptions* is ``True``, exceptions are treated the same as "
"successful results, and aggregated in the result list."
msgstr ""
msgid ""
"If ``gather()`` is *cancelled*, all submitted awaitables (that have not "
"completed yet) are also *cancelled*."
msgstr ""
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 ""
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 ""
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 ""
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 ""
msgid ""
"If the *gather* itself is cancelled, the cancellation is propagated "
"regardless of *return_exceptions*."
msgstr ""
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 ""
msgid "Eager task factory"
msgstr ""
msgid "A task factory for eager task execution."
msgstr ""
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 ""
msgid ""
"A common example where this is beneficial is coroutines which employ caching "
"or memoization to avoid actual I/O when possible."
msgstr ""
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 ""
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 ""
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 ""
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 ""
msgid "Shielding from cancellation"
msgstr ""
msgid ""
"Protect an :ref:`awaitable object <asyncio-awaitables>` from being :meth:"
"`cancelled <Task.cancel>`."
msgstr ""
msgid "If *aw* is a coroutine it is automatically scheduled as a Task."
msgstr ""
msgid "The statement::"
msgstr ""
msgid ""
"task = asyncio.create_task(something())\n"
"res = await shield(task)"
msgstr ""
msgid "is equivalent to::"
msgstr ""
msgid "res = await something()"
msgstr ""
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 ""
msgid ""
"If ``something()`` is cancelled by other means (i.e. from within itself) "
"that would also cancel ``shield()``."
msgstr ""
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 ""
msgid ""
"task = asyncio.create_task(something())\n"
"try:\n"
" res = await shield(task)\n"
"except CancelledError:\n"
" res = None"
msgstr ""
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 ""
msgid ""
"Deprecation warning is emitted if *aw* is not Future-like object and there "
"is no running event loop."
msgstr ""
msgid "Timeouts"
msgstr ""
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 ""
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 ""
msgid ""
"In either case, the context manager can be rescheduled after creation using :"
"meth:`Timeout.reschedule`."
msgstr ""
msgid ""
"async def main():\n"
" async with asyncio.timeout(10):\n"
" await long_running_task()"
msgstr ""
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 ""
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 ""
msgid "Example of catching :exc:`TimeoutError`::"
msgstr ""
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 ""
msgid ""
"The context manager produced by :func:`asyncio.timeout` can be rescheduled "
"to a different deadline and inspected."
msgstr ""
msgid ""
"An :ref:`asynchronous context manager <async-context-managers>` for "
"cancelling overdue coroutines."
msgstr ""
msgid ""
"Prefer using :func:`asyncio.timeout` or :func:`asyncio.timeout_at` rather "
"than instantiating :class:`!Timeout` directly."
msgstr ""
msgid ""
"``when`` should be an absolute time at which the context should time out, as "
"measured by the event loop's clock:"
msgstr ""
msgid "If ``when`` is ``None``, the timeout will never trigger."
msgstr ""
msgid ""
"If ``when < loop.time()``, the timeout will trigger on the next iteration of "
"the event loop."
msgstr ""
msgid ""
"Return the current deadline, or ``None`` if the current deadline is not set."
msgstr ""
msgid "Reschedule the timeout."
msgstr ""
msgid "Return whether the context manager has exceeded its deadline (expired)."
msgstr ""
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 ""
msgid "Timeout context managers can be safely nested."
msgstr ""
msgid ""
"Similar to :func:`asyncio.timeout`, except *when* is the absolute time to "
"stop waiting, or ``None``."
msgstr ""
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 ""
msgid ""
"Wait for the *aw* :ref:`awaitable <asyncio-awaitables>` to complete with a "
"timeout."
msgstr ""
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 ""
msgid ""
"If a timeout occurs, it cancels the task and raises :exc:`TimeoutError`."
msgstr ""
msgid ""
"To avoid the task :meth:`cancellation <Task.cancel>`, wrap it in :func:"
"`shield`."
msgstr ""
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 ""
msgid "If the wait is cancelled, the future *aw* is also cancelled."
msgstr ""
msgid ""
"async def eternity():\n"
" # Sleep for one hour\n"
" await asyncio.sleep(3600)\n"
" print('yay!')\n"
"\n"
"async def main():\n"