Threading

gto76 · gto76 · commit 08b4c8a9ceb8 · 2019-07-24T01:08:33.000+02:00
diff --git a/README.md b/README.md
@@ -1170,7 +1170,8 @@ Hello World!
 with open('<path>') as file: ...
 with wave.open('<path>') as wave_file: ...
 with memoryview(<bytes/bytearray/array>) as view: ...
-db = sqlite3.connect('<path>'); with db: db.execute('<insert_query>')
+with concurrent.futures.ThreadPoolExecutor() as executor: ...
+db = sqlite3.connect('<path>'); with db: ...
 lock = threading.RLock(); with lock: ...
 ```
 
@@ -1982,6 +1983,13 @@ with lock:
     ...
 ```
 
+### Thread Pool
+```python
+from concurrent.futures import ThreadPoolExecutor
+with ThreadPoolExecutor(max_workers=None) as executor:
+    results = executor.map(lambda x: x + 1, range(3))   # (1, 2, 3)
+```
+
 
 Introspection
 -------------
diff --git a/index.html b/index.html
@@ -1101,7 +1101,8 @@
 <div><h4 id="listofexistingcontextmanagers">List of existing context managers:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">with</span> open(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-keyword">as</span> file: ...
 <span class="hljs-keyword">with</span> wave.open(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-keyword">as</span> wave_file: ...
 <span class="hljs-keyword">with</span> memoryview(&lt;bytes/bytearray/array&gt;) <span class="hljs-keyword">as</span> view: ...
-db = sqlite3.connect(<span class="hljs-string">'&lt;path&gt;'</span>); <span class="hljs-keyword">with</span> db: db.execute(<span class="hljs-string">'&lt;insert_query&gt;'</span>)
+<span class="hljs-keyword">with</span> concurrent.futures.ThreadPoolExecutor() <span class="hljs-keyword">as</span> executor: ...
+db = sqlite3.connect(<span class="hljs-string">'&lt;path&gt;'</span>); <span class="hljs-keyword">with</span> db: ...
 lock = threading.RLock(); <span class="hljs-keyword">with</span> lock: ...
 </code></pre></div>
 
@@ -1740,6 +1741,11 @@
     ...
 </code></pre></div>
 
+<div><h3 id="threadpool">Thread Pool</h3><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> concurrent.futures <span class="hljs-keyword">import</span> ThreadPoolExecutor
+<span class="hljs-keyword">with</span> ThreadPoolExecutor(max_workers=<span class="hljs-keyword">None</span>) <span class="hljs-keyword">as</span> executor:
+    results = executor.map(<span class="hljs-keyword">lambda</span> x: x + <span class="hljs-number">1</span>, range(<span class="hljs-number">3</span>))   <span class="hljs-comment"># (1, 2, 3)</span>
+</code></pre></div>
+
 <div><h2 id="introspection"><a href="#introspection" name="introspection">#</a>Introspection</h2><p><strong>Inspecting code at runtime.</strong></p><div><h3 id="variables">Variables</h3><pre><code class="python language-python hljs">&lt;list&gt; = dir()      <span class="hljs-comment"># Names of variables in current scope.</span>
 &lt;dict&gt; = locals()   <span class="hljs-comment"># Dict of local variables. Also vars().</span>
 &lt;dict&gt; = globals()  <span class="hljs-comment"># Dict of global variables.</span>
