diff --git a/pdf/index_for_pdf.html b/pdf/index_for_pdf.html
index 2c78c79..fa899e6 100644
--- a/pdf/index_for_pdf.html
+++ b/pdf/index_for_pdf.html
@@ -15,7 +15,7 @@
 <strong>arrays, <a href="#array">29</a></strong><br>
 <strong>audio, <a href="#audio">40</a>-<a href="#writefloatsamplestowavfile">41</a></strong>  </p>
 <h3 id="b">B</h3>
-<p><strong>basic script template, <a href="#basicscripttemplate">44</a></strong><br>
+<p><strong>basic script template, <a href="#basicscripttemplate">49</a></strong><br>
 <strong>beautifulsoup library, <a href="#scraping">35</a></strong><br>
 <strong>binary representation, <a href="#binhex">8</a></strong><br>
 <strong>bitwise operators, <a href="#bitwiseoperators">8</a></strong><br>
@@ -36,7 +36,7 @@
 <strong>copy function, <a href="#copy">15</a></strong><br>
 <strong>coroutine, <a href="#coroutines">33</a></strong><br>
 <strong>counter, <a href="#counter">2</a>, <a href="#generator">4</a>, <a href="#nonlocal">12</a>, <a href="#iterator-1">17</a></strong><br>
-<strong>csv module, <a href="#csv">26</a>, <a href="#printsacsvfileasanasciitable">34</a></strong><br>
+<strong>csv module, <a href="#csv">26</a>, <a href="#printsacsvfileasanasciitable">34</a>, <a href="#encodedecode">47</a></strong><br>
 <strong>curses module, <a href="#curses">34</a></strong>  </p>
 <h3 id="d">D</h3>
 <p><strong>dataclasses module, <a href="#namedtupleenumdataclass">12</a></strong>, <a href="#dataclass">15</a></strong><br>
@@ -74,7 +74,7 @@
 <strong>iterator, <a href="#iterator">3</a>, <a href="#iterator-1">17</a></strong><br>
 <strong>itertools module, <a href="#itertools">3</a>, <a href="#combinatorics">8</a></strong>  </p>
 <h3 id="j">J</h3>
-<p><strong>json module, <a href="#json">25</a></strong>  </p>
+<p><strong>json module, <a href="#json">25</a>, <a href="#encodedecode">47</a></strong>  </p>
 <h3 id="l">L</h3>
 <p><strong>lambda, <a href="#lambda">11</a></strong><br>
 <strong>list comprehension, <a href="#comprehension">11</a></strong><br>
@@ -88,11 +88,11 @@
 <strong>memoryviews, <a href="#memoryview">29</a></strong><br>
 <strong>metaclass attribute, <a href="#metaclassattribute">32</a></strong><br>
 <strong>metaprograming, <a href="#metaprograming">31</a>-<a href="#metaclass">32</a></strong><br>
-<strong>mysql library, <a href="#mysql">26</a></strong>  </p>
+<strong>mysql library, <a href="#mysql">26</a>, <a href="#encodedecode">47</a></strong>  </p>
 <h3 id="n">N</h3>
 <p><strong>namedtuples, <a href="#namedtuple">3</a></strong><br>
 <strong>nonlocal keyword, <a href="#nonlocal">12</a></strong><br>
-<strong>numpy module, <a href="#numpy">37</a>-<a href="#indexing">38</a></strong>  </p>
+<strong>numpy library, <a href="#numpy">37</a>-<a href="#indexing">38</a></strong>  </p>
 <h3 id="o">O</h3>
 <p><strong>open function, <a href="#open">22</a>-<a href="#file">23</a></strong><br>
 <strong>operator module, <a href="#operator">31</a></strong><br>
@@ -109,7 +109,7 @@
 <strong>profiling, <a href="#profiling">36</a>-<a href="#timingasnippet">37</a></strong><br>
 <strong>progress bar, <a href="#progressbar">34</a></strong><br>
 <strong>property decorator, <a href="#property">15</a></strong><br>
-<strong>pygame module, <a href="#pygame">42</a></strong>  </p>
+<strong>pygame library, <a href="#pygame">42</a></strong>  </p>
 <h3 id="q">Q</h3>
 <p><strong>queues, <a href="#queue">30</a></strong>  </p>
 <h3 id="r">R</h3>
diff --git a/pdf/index_for_pdf_print.html b/pdf/index_for_pdf_print.html
index 9053aca..382277a 100644
--- a/pdf/index_for_pdf_print.html
+++ b/pdf/index_for_pdf_print.html
@@ -15,7 +15,7 @@
 <strong>arrays, 29</strong><br>
 <strong>audio, 40-41</strong>  </p>
 <h3 id="b">B</h3>
-<p><strong>basic script template, 44</strong><br>
+<p><strong>basic script template, 49</strong><br>
 <strong>beautifulsoup library, 35</strong><br>
 <strong>binary representation, 8</strong><br>
 <strong>bitwise operators, 8</strong><br>
@@ -36,7 +36,7 @@
 <strong>copy function, 15</strong><br>
 <strong>coroutine, 33</strong><br>
 <strong>counter, 2, 4, 12, 17</strong><br>
-<strong>csv module, 26, 34</strong><br>
+<strong>csv module, 26, 34, 47</strong><br>
 <strong>curses module, 34</strong>  </p>
 <h3 id="d">D</h3>
 <p><strong>dataclasses module, 12, 15</strong><br>
@@ -74,7 +74,7 @@
 <strong>iterator, 3, 17</strong><br>
 <strong>itertools module, 3, 8</strong>  </p>
 <h3 id="j">J</h3>
-<p><strong>json module, 25</strong>  </p>
+<p><strong>json module, 25, 47</strong>  </p>
 <h3 id="l">L</h3>
 <p><strong>lambda, 11</strong><br>
 <strong>list comprehension, 11</strong><br>
@@ -92,7 +92,7 @@
 <h3 id="n">N</h3>
 <p><strong>namedtuples, 3</strong><br>
 <strong>nonlocal keyword, 12</strong><br>
-<strong>numpy module, 37-38</strong>  </p>
+<strong>numpy library, 37-38</strong>  </p>
 <h3 id="o">O</h3>
 <p><strong>open function, 22-23</strong><br>
 <strong>operator module, 31</strong><br>
@@ -109,7 +109,7 @@
 <strong>profiling, 36-37</strong><br>
 <strong>progress bar, 34</strong><br>
 <strong>property decorator, 15</strong><br>
-<strong>pygame module, 42</strong>  </p>
+<strong>pygame library, 42</strong>  </p>
 <h3 id="q">Q</h3>
 <p><strong>queues, 30</strong>  </p>
 <h3 id="r">R</h3>
@@ -128,7 +128,7 @@
 <strong>slots attribute, 15</strong><br>
 <strong>sortable, 1, 16</strong><br>
 <strong>splat operator, 10-11</strong><br>
-<strong>sqlite module, 27</strong><br>
+<strong>sqlite module, 27, 47</strong><br>
 <strong>statistics module, 7</strong><br>
 <strong>strings, 5</strong><br>
 <strong>struct module, 28-29</strong><br>
diff --git a/web/script_2.js b/web/script_2.js
index 7b78435..4731a6c 100644
--- a/web/script_2.js
+++ b/web/script_2.js
@@ -35,8 +35,7 @@ const TOC_MOBILE =
   '    <strong><span class="hljs-string">\'7. Libraries\'</span></strong>:   [<a href="#progressbar">Progress_Bar</a>, <a href="#plot">Plot</a>, <a href="#table">Table</a>,\n' +
   '                       <a href="#curses">Curses</a>, <a href="#logging">Logging</a>, <a href="#scraping">Scraping</a>,\n' +
   '                       <a href="#web">Web</a>, <a href="#profiling">Profile</a>, <a href="#numpy">NumPy</a>,\n' +
-  '                       <a href="#image">Image</a>, <a href="#audio">Audio</a>, <a href="#pygame">Games</a>,\n' +
-  '                       <a href="#pandas">Data</a>]\n' +
+  '                       <a href="#image">Image</a>, <a href="#audio">Audio</a>, <a href="#pygame">Games</a>, <a href="#pandas">Data</a>]\n' +
   '}\n';