added 27th python tip

Author: learnbyexample

README.md

@@ -67,6 +67,7 @@ I'm addicted to reading fantasy/sci-fi books, so I have a [blog](https://learnby
 
 ## Tips
 
+* [Python tip 27: enumerate() function](https://learnbyexample.github.io/tips/python-tip-27/)
 * [Vim tip 25: substitute flags](https://learnbyexample.github.io/tips/vim-tip-25/)
 * [CLI tip 26: removing duplicate lines with GNU awk](https://learnbyexample.github.io/tips/cli-tip-26/)
 * [Python tip 26: atomic grouping](https://learnbyexample.github.io/tips/python-tip-26/)

atom.xml

@@ -5,8 +5,43 @@
 	<link href="https://learnbyexample.github.io/atom.xml" rel="self" type="application/atom+xml"/>
   <link href="https://learnbyexample.github.io"/>
 	<generator uri="https://www.getzola.org/">Zola</generator>
-	<updated>2023-04-25T00:00:00+00:00</updated>
+	<updated>2023-05-03T00:00:00+00:00</updated>
 	<id>https://learnbyexample.github.io/atom.xml</id>
+	<entry xml:lang="en">
+		<title>Python tip 27: enumerate() function</title>
+		<published>2023-05-03T00:00:00+00:00</published>
+		<updated>2023-05-03T00:00:00+00:00</updated>
+		<link rel="alternate" href="https://learnbyexample.github.io/tips/python-tip-27/" type="text/html"/>
+		<id>https://learnbyexample.github.io/tips/python-tip-27/</id>
+		<content type="html">&lt;p&gt;When you use a &lt;code&gt;for&lt;&#x2F;code&gt; loop, you get one element per each iteration. If you need the &lt;em&gt;index&lt;&#x2F;em&gt; of the elements as well, use the &lt;a href=&quot;https:&#x2F;&#x2F;docs.python.org&#x2F;3&#x2F;library&#x2F;functions.html#enumerate&quot;&gt;enumerate()&lt;&#x2F;a&gt; built-in function. You&#x27;ll get a &lt;code&gt;tuple&lt;&#x2F;code&gt; value per each iteration, containing index (starting with &lt;code&gt;0&lt;&#x2F;code&gt; by default) and the value at that index.&lt;&#x2F;p&gt;
+&lt;pre data-lang=&quot;python&quot; style=&quot;background-color:#f5f5f5;color:#1f1f1f;&quot; class=&quot;language-python &quot;&gt;&lt;code class=&quot;language-python&quot; data-lang=&quot;python&quot;&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;&amp;gt;&amp;gt;&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;nums &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;= &lt;&#x2F;span&gt;&lt;span&gt;[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;42&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;3.14&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;-&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;2&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;1000&lt;&#x2F;span&gt;&lt;span&gt;]
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;&amp;gt;&amp;gt;&amp;gt; for &lt;&#x2F;span&gt;&lt;span&gt;t &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;in &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b39f04;&quot;&gt;enumerate&lt;&#x2F;span&gt;&lt;span&gt;(nums):
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;...     &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b39f04;&quot;&gt;print&lt;&#x2F;span&gt;&lt;span&gt;(t)
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;... 
+&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;42&lt;&#x2F;span&gt;&lt;span&gt;)
+&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;1&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;3.14&lt;&#x2F;span&gt;&lt;span&gt;)
+&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;2&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;-&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;2&lt;&#x2F;span&gt;&lt;span&gt;)
+&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;3&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;1000&lt;&#x2F;span&gt;&lt;span&gt;)
+&lt;&#x2F;span&gt;&lt;span&gt;
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;&amp;gt;&amp;gt;&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;names &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;= &lt;&#x2F;span&gt;&lt;span&gt;[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Jo&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Joe&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Jon&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;]
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;&amp;gt;&amp;gt;&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;[(n1, n2) &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;for &lt;&#x2F;span&gt;&lt;span&gt;i, n1 &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;in &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b39f04;&quot;&gt;enumerate&lt;&#x2F;span&gt;&lt;span&gt;(names) &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;for &lt;&#x2F;span&gt;&lt;span&gt;n2 &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;in &lt;&#x2F;span&gt;&lt;span&gt;names[i&lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;1&lt;&#x2F;span&gt;&lt;span&gt;:]]
+&lt;&#x2F;span&gt;&lt;span&gt;[(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Jo&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Joe&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;), (&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Jo&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Jon&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;), (&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Joe&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;Jon&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;)]
+&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
+&lt;p&gt;By setting the &lt;code&gt;start&lt;&#x2F;code&gt; argument, you can change the initial value of the index.&lt;&#x2F;p&gt;
+&lt;pre data-lang=&quot;python&quot; style=&quot;background-color:#f5f5f5;color:#1f1f1f;&quot; class=&quot;language-python &quot;&gt;&lt;code class=&quot;language-python&quot; data-lang=&quot;python&quot;&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;&amp;gt;&amp;gt;&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;items &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;= &lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;car&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;table&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;book&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;)
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;&amp;gt;&amp;gt;&amp;gt; for &lt;&#x2F;span&gt;&lt;span&gt;idx, val &lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;in &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b39f04;&quot;&gt;enumerate&lt;&#x2F;span&gt;&lt;span&gt;(items, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#5597d6;&quot;&gt;start&lt;&#x2F;span&gt;&lt;span style=&quot;color:#72ab00;&quot;&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;1&lt;&#x2F;span&gt;&lt;span&gt;):
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;...     &lt;&#x2F;span&gt;&lt;span style=&quot;color:#b39f04;&quot;&gt;print&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#668f14;&quot;&gt;f&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;{idx}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;: &lt;&#x2F;span&gt;&lt;span&gt;{val}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d07711;&quot;&gt;&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;)
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;... 
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;1&lt;&#x2F;span&gt;&lt;span&gt;: car
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;2&lt;&#x2F;span&gt;&lt;span&gt;: table
+&lt;&#x2F;span&gt;&lt;span style=&quot;color:#b3933a;&quot;&gt;3&lt;&#x2F;span&gt;&lt;span&gt;: book
+&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
+&lt;p&gt;&lt;strong&gt;Video demo&lt;&#x2F;strong&gt;:&lt;&#x2F;p&gt;
+&lt;p align=&quot;center&quot;&gt;&lt;iframe width=&quot;560&quot; height=&quot;315&quot; loading=&quot;lazy&quot; src=&quot;https:&#x2F;&#x2F;www.youtube.com&#x2F;embed&#x2F;8a-Lg4mx1wA&quot; title=&quot;YouTube video player&quot; frameborder=&quot;0&quot; allow=&quot;accelerometer; clipboard-write; encrypted-media; gyroscope; picture-in-picture&quot; allowfullscreen&gt;&lt;&#x2F;iframe&gt;&lt;&#x2F;p&gt;
+&lt;br&gt;
+&lt;p&gt;&lt;img src=&quot;&#x2F;images&#x2F;info.svg&quot; alt=&quot;info&quot; &#x2F;&gt; See also my &lt;a href=&quot;https:&#x2F;&#x2F;github.com&#x2F;learnbyexample&#x2F;100_page_python_intro&quot;&gt;100 Page Python Intro&lt;&#x2F;a&gt; ebook.&lt;&#x2F;p&gt;
+</content>
+	</entry>
 	<entry xml:lang="en">
 		<title>Vim tip 25: substitute flags</title>
 		<published>2023-04-25T00:00:00+00:00</published>

sitemap.xml

@@ -424,7 +424,7 @@
     </url>
     <url>
         <loc>https://learnbyexample.github.io/tips/</loc>
-        <lastmod>2023-04-25</lastmod>
+        <lastmod>2023-05-03</lastmod>
     </url>
     <url>
         <loc>https://learnbyexample.github.io/tips/cli-tip-1/</loc>
@@ -606,6 +606,10 @@
         <loc>https://learnbyexample.github.io/tips/python-tip-26/</loc>
         <lastmod>2023-04-13</lastmod>
     </url>
+    <url>
+        <loc>https://learnbyexample.github.io/tips/python-tip-27/</loc>
+        <lastmod>2023-05-03</lastmod>
+    </url>
     <url>
         <loc>https://learnbyexample.github.io/tips/python-tip-3/</loc>
         <lastmod>2022-05-16</lastmod>