v1.0.2

docs/chapter/000-preface.html

@@ -816,7 +816,7 @@ <h2>Acknowledgements<a class="headerlink" href="#acknowledgements" title="Permal
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/110-setup.html

@@ -275,8 +275,9 @@ <h2><span class="section-number">1.1. </span>Installing Python<a class="headerli
 ever. We will surely be having a jolly good laugh<a class="footnote-reference brackets" href="#foottear" id="id1">1</a> along our
 journey.</p>
 <p>We will be using the reference implementation of the Python
-language (called <strong class="program">CPython</strong>), version 3.10 (or any later one).</p>
-<p>Users of Unix-like operating systems (GNU/Linux<a class="footnote-reference brackets" href="#footlinux" id="id2">2</a>, FreeBSD, etc.)
+language (called <strong class="program">CPython</strong><a class="footnote-reference brackets" href="#footcpython" id="id2">2</a>), version 3.10
+(or any later one).</p>
+<p>Users of Unix-like operating systems (GNU/Linux<a class="footnote-reference brackets" href="#footlinux" id="id3">3</a>, FreeBSD, etc.)
 may download Python via their native package
 manager (e.g., <code class="docutils literal notranslate"><span class="pre">sudo</span> <span class="pre">apt</span> <span class="pre">install</span> <span class="pre">python3</span></code> in Debian and Ubuntu).
 Then, additional Python packages (see <a class="reference internal" href="#sec-init"><span class="std std-numref">Section 1.4</span></a>) can be
@@ -286,7 +287,7 @@ <h2><span class="section-number">1.1. </span>Installing Python<a class="headerli
 <p>Users of other operating systems can download Python from the project’s
 website or some other distribution available on the market,
 e.g., Anaconda or Miniconda.</p>
-<div class="proof proof-type-exercise" id="id3">
+<div class="proof proof-type-exercise" id="id4">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.1</span>
@@ -306,10 +307,10 @@ <h2><span class="section-number">1.2. </span>Working with Jupyter Notebooks<a cl
 in some more advanced editors is the preferred option),
 we chose it here because of its educative
 advantages (interactive, easy to start with, etc.).</p>
-<figure class="align-default" id="id4">
+<figure class="align-default" id="id5">
 <span id="fig-jupyter-overview"></span><img alt="../_images/jupyter_overview.png" src="../_images/jupyter_overview.png" />
 <figcaption>
-<p><span class="caption-number">Figure 1.1 </span><span class="caption-text">Jupyter Notebook at a glance</span><a class="headerlink" href="#id4" title="Permalink to this image"></a></p>
+<p><span class="caption-number">Figure 1.1 </span><span class="caption-text">Jupyter Notebook at a glance</span><a class="headerlink" href="#id5" title="Permalink to this image"></a></p>
 </figcaption>
 </figure>
 <p>In Jupyter, we can work with:</p>
@@ -325,7 +326,7 @@ <h2><span class="section-number">1.2. </span>Working with Jupyter Notebooks<a cl
 and the ability to send code to the associated consoles;</p></li>
 </ul>
 <p>and many more.</p>
-<div class="proof proof-type-exercise" id="id5">
+<div class="proof proof-type-exercise" id="id6">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.2</span>
@@ -391,10 +392,10 @@ <h3><span class="section-number">1.2.2. </span>First Notebook<a class="headerlin
 <li><p>Press <code class="docutils literal notranslate"><span class="pre">Ctrl</span></code>+<code class="docutils literal notranslate"><span class="pre">Enter</span></code> (or <code class="docutils literal notranslate"><span class="pre">Cmd</span></code>+<code class="docutils literal notranslate"><span class="pre">Return</span></code> on macOS) to execute
 the code cell and display the result; see <a class="reference internal" href="#fig-jupyter-hello"><span class="std std-numref">Figure 1.2</span></a>.</p></li>
 </ol>
-<figure class="align-default" id="id6">
+<figure class="align-default" id="id7">
 <span id="fig-jupyter-hello"></span><img alt="../_images/jupyter_hello.png" src="../_images/jupyter_hello.png" />
 <figcaption>
-<p><span class="caption-number">Figure 1.2 </span><span class="caption-text">“Hello World” in a Jupyter notebook</span><a class="headerlink" href="#id6" title="Permalink to this image"></a></p>
+<p><span class="caption-number">Figure 1.2 </span><span class="caption-text">“Hello World” in a Jupyter notebook</span><a class="headerlink" href="#id7" title="Permalink to this image"></a></p>
 </figcaption>
 </figure>
 </section>
@@ -431,7 +432,7 @@ <h3><span class="section-number">1.2.3. </span>More Cells<a class="headerlink" h
 <li><p>Add three more code cells, displaying some text
 or creating other bar plots.</p></li>
 </ol>
-<div class="proof proof-type-exercise" id="id7">
+<div class="proof proof-type-exercise" id="id8">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.3</span>
@@ -512,22 +513,22 @@ <h3><span class="section-number">1.2.4. </span>Edit vs Command Mode<a class="hea
 <li><p>Notice that Markdown cells can be modified by entering the <em>Edit mode</em>
 as usual (<kbd class="kbd docutils literal notranslate">Enter</kbd> key).</p></li>
 </ol>
-<div class="proof proof-type-exercise" id="id8">
+<div class="proof proof-type-exercise" id="id9">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.4</span>
 
     </div><div class="proof-content">
 <p>Read the <a class="reference external" href="https://daringfireball.net/projects/markdown/syntax">official introduction</a>
 to the Markdown syntax.</p>
-</div></div><div class="proof proof-type-exercise" id="id9">
+</div></div><div class="proof proof-type-exercise" id="id10">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.5</span>
 
     </div><div class="proof-content">
 <p>Follow <a class="reference external" href="https://commonmark.org/help/tutorial/">this</a> interactive Markdown tutorial.</p>
-</div></div><div class="proof proof-type-exercise" id="id10">
+</div></div><div class="proof proof-type-exercise" id="id11">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.6</span>
@@ -665,7 +666,7 @@ <h2><span class="section-number">1.3. </span>The Best Note-Taking App<a class="h
 are available for download at
 <a class="reference external" href="https://github.com/gagolews/teaching-data">https://github.com/gagolews/teaching-data</a>.</p>
 </div>
-<div class="proof proof-type-exercise" id="id11">
+<div class="proof proof-type-exercise" id="id12">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.7</span>
@@ -683,15 +684,15 @@ <h2><span class="section-number">1.3. </span>The Best Note-Taking App<a class="h
 </div></div></section>
 <section id="exercises">
 <h2><span class="section-number">1.5. </span>Exercises<a class="headerlink" href="#exercises" title="Permalink to this heading"></a></h2>
-<div class="proof proof-type-exercise" id="id12">
+<div class="proof proof-type-exercise" id="id13">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.8</span>
 
     </div><div class="proof-content">
 <p>What is the difference between the <em>Edit</em> and the <em>Command</em> mode
 in Jupyter?</p>
-</div></div><div class="proof proof-type-exercise" id="id13">
+</div></div><div class="proof proof-type-exercise" id="id14">
 
     <div class="proof-title">
         <span class="proof-type">Exercise 1.9</span>
@@ -705,7 +706,12 @@ <h2><span class="section-number">1.5. </span>Exercises<a class="headerlink" href
 <dd><p>When we are all in tears because of mathematics and
 programming, those that we shed are often tears of joy.</p>
 </dd>
-<dt class="label" id="footlinux"><span class="brackets"><a class="fn-backref" href="#id2">2</a></span></dt>
+<dt class="label" id="footcpython"><span class="brackets"><a class="fn-backref" href="#id2">2</a></span></dt>
+<dd><p>(*) <strong class="program">CPython</strong> was written in the
+C programming language. Many Python packages are just convenient
+wrappers around code programmed in C, C++, or Fortran.</p>
+</dd>
+<dt class="label" id="footlinux"><span class="brackets"><a class="fn-backref" href="#id3">3</a></span></dt>
 <dd><p>GNU/Linux is the operating system of choice for
 machine learning engineers and data scientists both on the desktop
 and in the cloud. Switching to a free system at some point cannot be
@@ -735,7 +741,7 @@ <h2><span class="section-number">1.5. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/120-scalar.html

@@ -973,7 +973,7 @@ <h2><span class="section-number">2.5. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/130-sequential.html

@@ -1169,7 +1169,7 @@ <h2><span class="section-number">3.7. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/210-vector.html

@@ -1369,7 +1369,7 @@ <h2><span class="section-number">4.4. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/220-transform-vector.html

@@ -2207,7 +2207,7 @@ <h2><span class="section-number">5.6. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/230-distribution.html

@@ -1624,7 +1624,7 @@ <h2><span class="section-number">6.6. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/310-matrix.html

@@ -1217,7 +1217,7 @@ <h2><span class="section-number">7.5. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/320-transform-matrix.html

@@ -1675,7 +1675,7 @@ <h2><span class="section-number">8.5. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/330-relationship.html

@@ -2834,7 +2834,7 @@ <h2><span class="section-number">9.5. </span>Exercises<a class="headerlink" href
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/410-data-frame.html

@@ -2150,7 +2150,7 @@ <h2><span class="section-number">10.7. </span>Exercises<a class="headerlink" hre
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/420-categorical.html

@@ -1787,7 +1787,7 @@ <h2><span class="section-number">11.5. </span>Exercises<a class="headerlink" hre
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/430-group-by.html

@@ -2326,7 +2326,7 @@ <h2><span class="section-number">12.6. </span>Exercises<a class="headerlink" hre
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/440-sql.html

@@ -1312,7 +1312,7 @@ <h2><span class="section-number">13.7. </span>Exercises<a class="headerlink" hre
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/510-text.html

@@ -1821,7 +1821,7 @@ <h2><span class="section-number">14.5. </span>Exercises<a class="headerlink" hre
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/520-missingness.html

@@ -1064,7 +1064,7 @@ <h2><span class="section-number">15.5. </span>Exercises<a class="headerlink" hre
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/530-time-series.html

@@ -1290,7 +1290,7 @@ <h2><span class="section-number">16.5. </span>Exercises<a class="headerlink" hre
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/998-changelog.html

@@ -246,8 +246,9 @@
 </div>
 <p>Below is the list of the most noteworthy changes.</p>
 <ul class="simple">
-<li><p><strong>2022-08-18 (v1.0.2)</strong>:</p>
+<li><p><strong>2022-08-24 (v1.0.2)</strong>:</p>
 <ul>
+<li><p>First printed (softcover) version.</p></li>
 <li><p>Fix page margins and headers.</p></li>
 <li><p>Minor typesetting and other fixes.</p></li>
 </ul>
@@ -360,7 +361,7 @@
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/999-bibliography.html

@@ -528,7 +528,7 @@ <h1>Bibliography<a class="headerlink" href="#bibliography" title="Permalink to t
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/chapter/chapter-header-motd.html

@@ -253,7 +253,7 @@
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
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+        Last updated on 2022-08-24T19:02:20+1000.
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docs/genindex.html

@@ -248,7 +248,7 @@ <h1 id="index">Index</h1>
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
       </span>
 
 

docs/index.html

@@ -474,7 +474,7 @@ <h1>Minimalist Data Wrangling with Python<a class="headerlink" href="#minimalist
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
-        Last updated on 2022-08-22T12:32:01+1000.
+        Last updated on 2022-08-24T19:02:20+1000.
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docs/search.html

@@ -256,7 +256,7 @@
     and a customised <a href="https://github.com/rtfd/sphinx_rtd_theme">rtd</a>
     theme.
       <span class="lastupdated">
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