diff --git a/pdf/index_for_pdf.html b/pdf/index_for_pdf.html
index eaf5d0a..72dd72b 100644
--- a/pdf/index_for_pdf.html
+++ b/pdf/index_for_pdf.html
@@ -15,7 +15,6 @@
 <p><strong>beautifulsoup library, <a href="#scrapespythonsurlversionnumberandlogofromitswikipediapage">35</a></strong><br>
 <strong>binary representation, <a href="#ints">7</a>, <a href="#binhex">8</a></strong><br>
 <strong>bitwise operators, <a href="#bitwiseoperators">8</a>, <a href="#operator">31</a></strong><br>
-<strong>bottle library, <a href="#web">36</a></strong><br>
 <strong>bytes, <a href="#open">22</a>-<a href="#modes">23</a>, <a href="#pickle">25</a>, <a href="#bytes">28</a>-<a href="#memoryview">29</a></strong>  </p>
 <h3 id="c">C</h3>
 <p><strong>cache, <a href="#lrucache">13</a></strong><br>
@@ -50,6 +49,7 @@
 <h3 id="f">F</h3>
 <p><strong>files, <a href="#print">22</a>-<a href="#memoryview">29</a>, <a href="#runsabasicfileexplorerintheterminal">34</a>, <a href="#dataframeencodedecodeplot">46</a></strong><br>
 <strong>filter function, <a href="#mapfilterreduce">11</a></strong><br>
+<strong>flask library, <a href="#web">36</a></strong><br>
 <strong>floats, <a href="#abstractbaseclasses">4</a>, <a href="#floats">6</a>, <a href="#types">7</a></strong><br>
 <strong>format, <a href="#format">6</a>-<a href="#comparisonofpresentationtypes">7</a>, <a href="#callgraph">37</a></strong><br>
 <strong>functools module, <a href="#mapfilterreduce">11</a>, <a href="#partial">12</a>, <a href="#debuggerexample">13</a>, <a href="#sortable">16</a></strong><br>
diff --git a/pdf/index_for_pdf_print.html b/pdf/index_for_pdf_print.html
index 30ee078..e65c322 100644
--- a/pdf/index_for_pdf_print.html
+++ b/pdf/index_for_pdf_print.html
@@ -15,7 +15,6 @@
 <p><strong>beautifulsoup library, 35</strong><br>
 <strong>binary representation, 7, 8</strong><br>
 <strong>bitwise operators, 8, 31</strong><br>
-<strong>bottle library, 36</strong><br>
 <strong>bytes, 22-23, 25, 28-29</strong>  </p>
 <h3 id="c">C</h3>
 <p><strong>cache, 13</strong><br>
@@ -50,6 +49,7 @@
 <h3 id="f">F</h3>
 <p><strong>files, 22-29, 34, 46</strong><br>
 <strong>filter function, 11</strong><br>
+<strong>flask library, 36</strong><br>
 <strong>floats, 4, 6, 7</strong><br>
 <strong>format, 6-7, 37</strong><br>
 <strong>functools module, 11, 12, 13, 16</strong><br>