asyncio-future.po

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# Translators:
# MuSheng Chen <sheng.2179@gmail.com>, 2019
# Woko <banbooliu@gmail.com>, 2019
# Freesand Leo <yuqinju@163.com>, 2022
# 
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msgstr ""
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#: ../../library/asyncio-future.rst:8
msgid "Futures"
msgstr "Futures"

#: ../../library/asyncio-future.rst:10
msgid ""
"**Source code:** :source:`Lib/asyncio/futures.py`, "
":source:`Lib/asyncio/base_futures.py`"
msgstr ""
"**源代码:** :source:`Lib/asyncio/futures.py`, "
":source:`Lib/asyncio/base_futures.py`"

#: ../../library/asyncio-future.rst:15
msgid ""
"*Future* objects are used to bridge **low-level callback-based code** with "
"high-level async/await code."
msgstr "*Future* 对象用来链接  **底层回调式代码** 和高层异步/等待式代码。"

#: ../../library/asyncio-future.rst:20
msgid "Future Functions"
msgstr "Future 函数"

#: ../../library/asyncio-future.rst:24
msgid "Return ``True`` if *obj* is either of:"
msgstr "如果 *obj* 为下面任意对象，返回 ``True``："

#: ../../library/asyncio-future.rst:26
msgid "an instance of :class:`asyncio.Future`,"
msgstr "一个 :class:`asyncio.Future` 类的实例，"

#: ../../library/asyncio-future.rst:27
msgid "an instance of :class:`asyncio.Task`,"
msgstr "一个 :class:`asyncio.Task` 类的实例，"

#: ../../library/asyncio-future.rst:28
msgid "a Future-like object with a ``_asyncio_future_blocking`` attribute."
msgstr "带有  ``_asyncio_future_blocking`` 属性的类似 Future 的对象。"

#: ../../library/asyncio-future.rst:36
msgid "Return:"
msgstr "返回："

#: ../../library/asyncio-future.rst:38
msgid ""
"*obj* argument as is, if *obj* is a :class:`Future`, a :class:`Task`, or a "
"Future-like object (:func:`isfuture` is used for the test.)"
msgstr ""
"*obj* 参数会是保持原样，如果 *obj* 是 :class:`Future`、 :class:`Task` 或 类似 Future 的对象(  "
":func:`isfuture`  用于测试。)"

#: ../../library/asyncio-future.rst:42
msgid ""
"a :class:`Task` object wrapping *obj*, if *obj* is a coroutine "
"(:func:`iscoroutine` is used for the test); in this case the coroutine will "
"be scheduled by ``ensure_future()``."
msgstr ""
"封装了 *obj* 的 :class:`Task` 对象，如果 *obj* 是一个协程 (使用 :func:`iscoroutine` "
"进行检测)；在此情况下该协程将通过 ``ensure_future()`` 加入执行计划。"

#: ../../library/asyncio-future.rst:47
msgid ""
"a :class:`Task` object that would await on *obj*, if *obj* is an awaitable "
"(:func:`inspect.isawaitable` is used for the test.)"
msgstr ""
"等待 *obj* 的 :class:`Task` 对象，如果 *obj* 是一个可等待对象( :func:`inspect.isawaitable` "
"用于测试)"

#: ../../library/asyncio-future.rst:50
msgid "If *obj* is neither of the above a :exc:`TypeError` is raised."
msgstr "如果 *obj* 不是上述对象会引发一个 :exc:`TypeError` 异常。"

#: ../../library/asyncio-future.rst:54
msgid ""
"See also the :func:`create_task` function which is the preferred way for "
"creating new Tasks."
msgstr "查看 :func:`create_task` 函数，它是创建新任务的首选途径。"

#: ../../library/asyncio-future.rst:57
msgid ""
"Save a reference to the result of this function, to avoid a task "
"disappearing mid execution."
msgstr "保存一个指向此函数的结果的引用，以避免任务在执行期间消失。"

#: ../../library/asyncio-future.rst:60
msgid "The function accepts any :term:`awaitable` object."
msgstr "这个函数接受任意 :term:`awaitable` 对象。"

#: ../../library/asyncio-future.rst:66
msgid ""
"Wrap a :class:`concurrent.futures.Future` object in a "
":class:`asyncio.Future` object."
msgstr ""
"将一个 :class:`concurrent.futures.Future` 对象封装到 :class:`asyncio.Future` 对象中。"

#: ../../library/asyncio-future.rst:71
msgid "Future Object"
msgstr "Future 对象"

#: ../../library/asyncio-future.rst:75
msgid ""
"A Future represents an eventual result of an asynchronous operation.  Not "
"thread-safe."
msgstr "一个 Future 代表一个异步运算的最终结果。线程不安全。"

#: ../../library/asyncio-future.rst:78
msgid ""
"Future is an :term:`awaitable` object.  Coroutines can await on Future "
"objects until they either have a result or an exception set, or until they "
"are cancelled."
msgstr "Future 是一个 :term:`awaitable` 对象。协程可以等待 Future 对象直到它们有结果或异常集合或被取消。"

#: ../../library/asyncio-future.rst:82
msgid ""
"Typically Futures are used to enable low-level callback-based code (e.g. in "
"protocols implemented using asyncio :ref:`transports <asyncio-transports-"
"protocols>`) to interoperate with high-level async/await code."
msgstr ""
"通常 Future 用于支持底层回调式代码(例如在协议实现中使用asyncio :ref:`transports<asyncio-transports-"
"protocols>`) 与高层异步/等待式代码交互。"

#: ../../library/asyncio-future.rst:87
msgid ""
"The rule of thumb is to never expose Future objects in user-facing APIs, and"
" the recommended way to create a Future object is to call "
":meth:`loop.create_future`.  This way alternative event loop implementations"
" can inject their own optimized implementations of a Future object."
msgstr ""
"经验告诉我们永远不要面向用户的接口暴露 Future 对象，同时建议使用 :meth:`loop.create_future` 来创建 Future "
"对象。这种方法可以让 Future 对象使用其它的事件循环实现，它可以注入自己的优化实现。"

#: ../../library/asyncio-future.rst:93
msgid "Added support for the :mod:`contextvars` module."
msgstr "加入对 :mod:`contextvars` 模块的支持。"

#: ../../library/asyncio-future.rst:98
msgid "Return the result of the Future."
msgstr "返回 Future 的结果。"

#: ../../library/asyncio-future.rst:100
msgid ""
"If the Future is *done* and has a result set by the :meth:`set_result` "
"method, the result value is returned."
msgstr "如果 Future 状态为 *完成* ，并由 :meth:`set_result` 方法设置一个结果，则返回这个结果。"

#: ../../library/asyncio-future.rst:103
msgid ""
"If the Future is *done* and has an exception set by the "
":meth:`set_exception` method, this method raises the exception."
msgstr "如果 Future 状态为 *完成* ，并由  :meth:`set_exception` 方法设置一个异常，那么这个方法会引发异常。"

#: ../../library/asyncio-future.rst:106 ../../library/asyncio-future.rst:194
msgid ""
"If the Future has been *cancelled*, this method raises a "
":exc:`CancelledError` exception."
msgstr "如果 Future 已 *取消*，方法会引发一个 :exc:`CancelledError` 异常。"

#: ../../library/asyncio-future.rst:109
msgid ""
"If the Future's result isn't yet available, this method raises a "
":exc:`InvalidStateError` exception."
msgstr "如果 Future 的结果还不可用，此方法会引发一个 :exc:`InvalidStateError` 异常。"

#: ../../library/asyncio-future.rst:114
msgid "Mark the Future as *done* and set its result."
msgstr "将 Future 标记为 *完成* 并设置结果。"

#: ../../library/asyncio-future.rst:116 ../../library/asyncio-future.rst:123
msgid ""
"Raises a :exc:`InvalidStateError` error if the Future is already *done*."
msgstr "如果 Future 已经 *完成*  则抛出一个 :exc:`InvalidStateError` 错误。"

#: ../../library/asyncio-future.rst:121
msgid "Mark the Future as *done* and set an exception."
msgstr "将 Future 标记为 *完成* 并设置一个异常。"

#: ../../library/asyncio-future.rst:128
msgid "Return ``True`` if the Future is *done*."
msgstr "如果 Future 为已 *完成* 则返回 ``True`` 。"

#: ../../library/asyncio-future.rst:130
msgid ""
"A Future is *done* if it was *cancelled* or if it has a result or an "
"exception set with :meth:`set_result` or :meth:`set_exception` calls."
msgstr ""
"如果 Future 为 *取消* 或调用 :meth:`set_result` 设置了结果或调用 :meth:`set_exception` "
"设置了异常，那么它就是 *完成* 。"

#: ../../library/asyncio-future.rst:136
msgid "Return ``True`` if the Future was *cancelled*."
msgstr "如果 Future 已 *取消* 则返回 ``True`` "

#: ../../library/asyncio-future.rst:138
msgid ""
"The method is usually used to check if a Future is not *cancelled* before "
"setting a result or an exception for it::"
msgstr "这个方法通常在设置结果或异常前用来检查 Future 是否已 *取消* 。"

#: ../../library/asyncio-future.rst:146
msgid "Add a callback to be run when the Future is *done*."
msgstr "添加一个在 Future *完成* 时运行的回调函数。"

#: ../../library/asyncio-future.rst:148
msgid "The *callback* is called with the Future object as its only argument."
msgstr "调用 *callback* 时，Future 对象是它的唯一参数。"

#: ../../library/asyncio-future.rst:151
msgid ""
"If the Future is already *done* when this method is called, the callback is "
"scheduled with :meth:`loop.call_soon`."
msgstr "如果调用这个方法时 Future 已经 *完成*，回调函数会被 :meth:`loop.call_soon` 调度。"

#: ../../library/asyncio-future.rst:154
msgid ""
"An optional keyword-only *context* argument allows specifying a custom "
":class:`contextvars.Context` for the *callback* to run in. The current "
"context is used when no *context* is provided."
msgstr ""
"可选键值类的参数 *context* 允许 *callback* 运行在一个指定的自定义 :class:`contextvars.Context` "
"对象中。如果没有提供 *context* ，则使用当前上下文。"

#: ../../library/asyncio-future.rst:158
msgid ""
":func:`functools.partial` can be used to pass parameters to the callback, "
"e.g.::"
msgstr "可以用 :func:`functools.partial` 给回调函数传递参数，例如::"

#: ../../library/asyncio-future.rst:165
msgid ""
"The *context* keyword-only parameter was added. See :pep:`567` for more "
"details."
msgstr "加入键值类形参  *context*。请参阅 :pep:`567` 查看更多细节。"

#: ../../library/asyncio-future.rst:171
msgid "Remove *callback* from the callbacks list."
msgstr "从回调列表中移除 *callback* 。"

#: ../../library/asyncio-future.rst:173
msgid ""
"Returns the number of callbacks removed, which is typically 1, unless a "
"callback was added more than once."
msgstr "返回被移除的回调函数的数量，通常为1，除非一个回调函数被添加多次。"

#: ../../library/asyncio-future.rst:178
msgid "Cancel the Future and schedule callbacks."
msgstr "取消 Future 并调度回调函数。"

#: ../../library/asyncio-future.rst:180
msgid ""
"If the Future is already *done* or *cancelled*, return ``False``. Otherwise,"
" change the Future's state to *cancelled*, schedule the callbacks, and "
"return ``True``."
msgstr ""
"如果 Future 已经 *完成* 或 *取消* ，返回 ``False`` 。否则将 Future 状态改为 *取消* 并在调度回调函数后返回 "
"``True`` 。"

#: ../../library/asyncio-future.rst:184
msgid "Added the ``msg`` parameter."
msgstr "增加了 ``msg`` 形参。"

#: ../../library/asyncio-future.rst:189
msgid "Return the exception that was set on this Future."
msgstr "返回 Future 已设置的异常。"

#: ../../library/asyncio-future.rst:191
msgid ""
"The exception (or ``None`` if no exception was set) is returned only if the "
"Future is *done*."
msgstr "只有 Future 在 *完成* 时才返回异常（或者 ``None`` ，如果没有设置异常）。"

#: ../../library/asyncio-future.rst:197
msgid ""
"If the Future isn't *done* yet, this method raises an "
":exc:`InvalidStateError` exception."
msgstr "如果 Future 还没 *完成* ，这个方法会引发一个 :exc:`InvalidStateError` 异常。"

#: ../../library/asyncio-future.rst:202
msgid "Return the event loop the Future object is bound to."
msgstr "返回 Future 对象已绑定的事件循环。"

#: ../../library/asyncio-future.rst:209
msgid ""
"This example creates a Future object, creates and schedules an asynchronous "
"Task to set result for the Future, and waits until the Future has a result::"
msgstr "这个例子创建一个 Future 对象，创建和调度一个异步任务去设置 Future 结果，然后等待其结果::"

#: ../../library/asyncio-future.rst:244
msgid ""
"The Future object was designed to mimic :class:`concurrent.futures.Future`."
"  Key differences include:"
msgstr "该 Future 对象是为了模仿 :class:`concurrent.futures.Future` 类。主要差异包含："

#: ../../library/asyncio-future.rst:247
msgid ""
"unlike asyncio Futures, :class:`concurrent.futures.Future` instances cannot "
"be awaited."
msgstr "与 asyncio 的 Future 不同，:class:`concurrent.futures.Future`  实例不是可等待对象。"

#: ../../library/asyncio-future.rst:250
msgid ""
":meth:`asyncio.Future.result` and :meth:`asyncio.Future.exception` do not "
"accept the *timeout* argument."
msgstr ""
":meth:`asyncio.Future.result` 和 :meth:`asyncio.Future.exception` 不接受 "
"*timeout* 参数。"

#: ../../library/asyncio-future.rst:253
msgid ""
":meth:`asyncio.Future.result` and :meth:`asyncio.Future.exception` raise an "
":exc:`InvalidStateError` exception when the Future is not *done*."
msgstr ""
"Future 没有 *完成* 时 :meth:`asyncio.Future.result` 和 "
":meth:`asyncio.Future.exception` 抛出一个 :exc:`InvalidStateError` 异常。"

#: ../../library/asyncio-future.rst:257
msgid ""
"Callbacks registered with :meth:`asyncio.Future.add_done_callback` are not "
"called immediately.  They are scheduled with :meth:`loop.call_soon` instead."
msgstr ""
"使用 :meth:`asyncio.Future.add_done_callback` 注册的回调函数不会立即调用，而是被 "
":meth:`loop.call_soon` 调度。"

#: ../../library/asyncio-future.rst:261
msgid ""
"asyncio Future is not compatible with the :func:`concurrent.futures.wait` "
"and :func:`concurrent.futures.as_completed` functions."
msgstr ""
"asyncio Future 不能兼容  :func:`concurrent.futures.wait` 和 "
":func:`concurrent.futures.as_completed` 函数。"

#: ../../library/asyncio-future.rst:265
msgid ""
":meth:`asyncio.Future.cancel` accepts an optional ``msg`` argument, but "
":func:`concurrent.futures.cancel` does not."
msgstr ""
":meth:`asyncio.Future.cancel` 接受一个可选的 ``msg`` 参数，但 "
":func:`concurrent.futures.cancel` 无此参数。"