晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
Prv8 Shell
Server : Apache
System : Linux srv.rainic.com 4.18.0-553.47.1.el8_10.x86_64 #1 SMP Wed Apr 2 05:45:37 EDT 2025 x86_64
User : rainic ( 1014)
PHP Version : 7.4.33
Disable Function : exec,passthru,shell_exec,system
Directory :  /usr/share/doc/python3-docs/html/_sources/library/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Current File : //usr/share/doc/python3-docs/html/_sources/library/asyncio.rst.txt
:mod:`asyncio` --- Asynchronous I/O, event loop, coroutines and tasks
=====================================================================

.. module:: asyncio
   :synopsis: Asynchronous I/O, event loop, coroutines and tasks.

.. versionadded:: 3.4

**Source code:** :source:`Lib/asyncio/`

--------------

This module provides infrastructure for writing single-threaded concurrent
code using coroutines, multiplexing I/O access over sockets and other
resources, running network clients and servers, and other related primitives.
Here is a more detailed list of the package contents:

* a pluggable :ref:`event loop <asyncio-event-loop>` with various system-specific
  implementations;

* :ref:`transport <asyncio-transport>` and :ref:`protocol <asyncio-protocol>` abstractions
  (similar to those in `Twisted <https://twistedmatrix.com/trac/>`_);

* concrete support for TCP, UDP, SSL, subprocess pipes, delayed calls, and
  others (some may be system-dependent);

* a :class:`Future` class that mimics the one in the :mod:`concurrent.futures`
  module, but adapted for use with the event loop;

* coroutines and tasks based on ``yield from`` (:PEP:`380`), to help write
  concurrent code in a sequential fashion;

* cancellation support for :class:`Future`\s and coroutines;

* :ref:`synchronization primitives <asyncio-sync>` for use between coroutines in
  a single thread, mimicking those in the :mod:`threading` module;

* an interface for passing work off to a threadpool, for times when
  you absolutely, positively have to use a library that makes blocking
  I/O calls.

Asynchronous programming is more complex than classical "sequential"
programming: see the :ref:`Develop with asyncio <asyncio-dev>` page which lists
common traps and explains how to avoid them. :ref:`Enable the debug mode
<asyncio-debug-mode>` during development to detect common issues.

Table of contents:

.. toctree::
   :maxdepth: 3

   asyncio-eventloop.rst
   asyncio-eventloops.rst
   asyncio-task.rst
   asyncio-protocol.rst
   asyncio-stream.rst
   asyncio-subprocess.rst
   asyncio-sync.rst
   asyncio-queue.rst
   asyncio-dev.rst

.. seealso::

   The :mod:`asyncio` module was designed in :PEP:`3156`. For a
   motivational primer on transports and protocols, see :PEP:`3153`.

haha - 2025