Coroutines

2 years ago · 23b7fd7919
3 changed files with 19 additions and 16 deletions
--- a/README.md
+++ b/README.md
@ -2302,7 +2302,7 @@ Coroutines
 * **Coroutines have a lot in common with threads, but unlike threads, they only give up control when they call another coroutine and they don’t use as much memory.**
 * **Coroutine definition starts with `'async'` and its call with `'await'`.**
 * **`'asyncio.run(<coroutine>)'` is the main entry point for asynchronous programs.**
-* **Functions wait(), gather() and as_completed() can be used when multiple coroutines need to be started at the same time.**
+* **Functions wait(), gather() and as_completed() start multiple coroutines at the same time.**
 * **Asyncio module also provides its own [Queue](#queue), [Event](#semaphore-event-barrier), [Lock](#lock) and [Semaphore](#semaphore-event-barrier) classes.**

 #### Runs a terminal game where you control an asterisk that must avoid numbers:
@ -2320,11 +2320,12 @@ def main(screen):
    asyncio.run(main_coroutine(screen))        # Starts running asyncio code.

 async def main_coroutine(screen):
-    state = {'*': P(0, 0), **{id_: P(W//2, H//2) for id_ in range(10)}}
    moves = asyncio.Queue()
-    coros = (*(random_controller(id_, moves) for id_ in range(10)),
-             human_controller(screen, moves), model(moves, state), view(state, screen))
-    await asyncio.wait(coros, return_when=asyncio.FIRST_COMPLETED)
+    state = {'*': P(0, 0), **{id_: P(W//2, H//2) for id_ in range(10)}}
+    ai    = [random_controller(id_, moves) for id_ in range(10)]
+    mvc   = [human_controller(screen, moves), model(moves, state), view(state, screen)]
+    tasks = [asyncio.create_task(cor) for cor in ai + mvc]
+    await asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED)

 async def random_controller(id_, moves):
    while True:
--- a/index.html
+++ b/index.html
@ -54,7 +54,7 @@

 <body>
  <header>
-    <aside>September 12, 2022</aside>
+    <aside>September 16, 2022</aside>
    <a href="https://gto76.github.io" rel="author">Jure Šorn</a>
  </header>

@ -1889,7 +1889,7 @@ ValueError: malformed node or string
 <li><strong>Coroutines have a lot in common with threads, but unlike threads, they only give up control when they call another coroutine and they don’t use as much memory.</strong></li>
 <li><strong>Coroutine definition starts with <code class="python hljs"><span class="hljs-string">'async'</span></code> and its call with <code class="python hljs"><span class="hljs-string">'await'</span></code>.</strong></li>
 <li><strong><code class="python hljs"><span class="hljs-string">'asyncio.run(&lt;coroutine&gt;)'</span></code> is the main entry point for asynchronous programs.</strong></li>
-<li><strong>Functions wait(), gather() and as_completed() can be used when multiple coroutines need to be started at the same time.</strong></li>
+<li><strong>Functions wait(), gather() and as_completed() start multiple coroutines at the same time.</strong></li>
 <li><strong>Asyncio module also provides its own <a href="#queue">Queue</a>, <a href="#semaphoreeventbarrier">Event</a>, <a href="#lock">Lock</a> and <a href="#semaphoreeventbarrier">Semaphore</a> classes.</strong></li>
 </ul><div><h4 id="runsaterminalgamewhereyoucontrolanasteriskthatmustavoidnumbers">Runs a terminal game where you control an asterisk that must avoid numbers:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">import</span> asyncio, collections, curses, curses.textpad, enum, random

@ -1903,11 +1903,12 @@ W, H = <span class="hljs-number">15</span>, <span class="hljs-number">7</span>
    asyncio.run(main_coroutine(screen))        <span class="hljs-comment"># Starts running asyncio code.</span>

 <span class="hljs-keyword">async</span> <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">main_coroutine</span><span class="hljs-params">(screen)</span>:</span>
-    state = {<span class="hljs-string">'*'</span>: P(<span class="hljs-number">0</span>, <span class="hljs-number">0</span>), **{id_: P(W//<span class="hljs-number">2</span>, H//<span class="hljs-number">2</span>) <span class="hljs-keyword">for</span> id_ <span class="hljs-keyword">in</span> range(<span class="hljs-number">10</span>)}}
    moves = asyncio.Queue()
-    coros = (*(random_controller(id_, moves) <span class="hljs-keyword">for</span> id_ <span class="hljs-keyword">in</span> range(<span class="hljs-number">10</span>)),
-             human_controller(screen, moves), model(moves, state), view(state, screen))
-    <span class="hljs-keyword">await</span> asyncio.wait(coros, return_when=asyncio.FIRST_COMPLETED)
+    state = {<span class="hljs-string">'*'</span>: P(<span class="hljs-number">0</span>, <span class="hljs-number">0</span>), **{id_: P(W//<span class="hljs-number">2</span>, H//<span class="hljs-number">2</span>) <span class="hljs-keyword">for</span> id_ <span class="hljs-keyword">in</span> range(<span class="hljs-number">10</span>)}}
+    ai    = [random_controller(id_, moves) <span class="hljs-keyword">for</span> id_ <span class="hljs-keyword">in</span> range(<span class="hljs-number">10</span>)]
+    mvc   = [human_controller(screen, moves), model(moves, state), view(state, screen)]
+    tasks = [asyncio.create_task(cor) <span class="hljs-keyword">for</span> cor <span class="hljs-keyword">in</span> ai + mvc]
+    <span class="hljs-keyword">await</span> asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED)

 <span class="hljs-keyword">async</span> <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">random_controller</span><span class="hljs-params">(id_, moves)</span>:</span>
    <span class="hljs-keyword">while</span> <span class="hljs-keyword">True</span>:
@ -2905,7 +2906,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.'  <span class="hljs-comment">
 

  <footer>
-    <aside>September 12, 2022</aside>
+    <aside>September 16, 2022</aside>
    <a href="https://gto76.github.io" rel="author">Jure Šorn</a>
  </footer>

--- a/parse.js
+++ b/parse.js
@ -119,11 +119,12 @@ const COROUTINES =
  '    asyncio.run(main_coroutine(screen))        <span class="hljs-comment"># Starts running asyncio code.</span>\n' +
  '\n' +
  '<span class="hljs-keyword">async</span> <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">main_coroutine</span><span class="hljs-params">(screen)</span>:</span>\n' +
-  '    state = {<span class="hljs-string">\'*\'</span>: P(<span class="hljs-number">0</span>, <span class="hljs-number">0</span>), **{id_: P(W//<span class="hljs-number">2</span>, H//<span class="hljs-number">2</span>) <span class="hljs-keyword">for</span> id_ <span class="hljs-keyword">in</span> range(<span class="hljs-number">10</span>)}}\n' +
  '    moves = asyncio.Queue()\n' +
-  '    coros = (*(random_controller(id_, moves) <span class="hljs-keyword">for</span> id_ <span class="hljs-keyword">in</span> range(<span class="hljs-number">10</span>)),\n' +
-  '             human_controller(screen, moves), model(moves, state), view(state, screen))\n' +
-  '    <span class="hljs-keyword">await</span> asyncio.wait(coros, return_when=asyncio.FIRST_COMPLETED)\n' +
+  '    state = {<span class="hljs-string">\'*\'</span>: P(<span class="hljs-number">0</span>, <span class="hljs-number">0</span>), **{id_: P(W//<span class="hljs-number">2</span>, H//<span class="hljs-number">2</span>) <span class="hljs-keyword">for</span> id_ <span class="hljs-keyword">in</span> range(<span class="hljs-number">10</span>)}}\n' +
+  '    ai    = [random_controller(id_, moves) <span class="hljs-keyword">for</span> id_ <span class="hljs-keyword">in</span> range(<span class="hljs-number">10</span>)]\n' +
+  '    mvc   = [human_controller(screen, moves), model(moves, state), view(state, screen)]\n' +
+  '    tasks = [asyncio.create_task(cor) <span class="hljs-keyword">for</span> cor <span class="hljs-keyword">in</span> ai + mvc]\n' +
+  '    <span class="hljs-keyword">await</span> asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED)\n' +
  '\n' +
  '<span class="hljs-keyword">async</span> <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">random_controller</span><span class="hljs-params">(id_, moves)</span>:</span>\n' +
  '    <span class="hljs-keyword">while</span> <span class="hljs-keyword">True</span>:\n' +