Update documentation

_sources/materials/18-WrapUp.ipynb

@@ -566,8 +566,9 @@
    },
    "outputs": [],
    "source": [
-    "# can just search for a letter\n",
-    "re.findall('o', my_string)"
+    "# can just search for a letter - note that the 'r' in front of the string \n",
+    "# changes it to a \"raw string literal\", needed to avoid complaints by re when using backslashes\n",
+    "re.findall(r'o', my_string)"
    ]
   },
   {
@@ -581,7 +582,7 @@
    "outputs": [],
    "source": [
     "# but the patterns are where these shine\n",
-    "re.findall('\\d\\d', my_string)"
+    "re.findall(r'\\d\\d', my_string)"
    ]
   },
   {

materials/18-WrapUp.html

@@ -746,16 +746,17 @@ <h2>Regular Expressions<a class="headerlink" href="#regular-expressions" title="
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-<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># can just search for a letter</span>
-<span class="n">re</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span><span class="s1">&#39;o&#39;</span><span class="p">,</span> <span class="n">my_string</span><span class="p">)</span>
+<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># can just search for a letter - note that the &#39;r&#39; in front of the string </span>
+<span class="c1"># changes it to a &quot;raw string literal&quot;, needed to avoid complaints by re when using backslashes</span>
+<span class="n">re</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span><span class="sa">r</span><span class="s1">&#39;o&#39;</span><span class="p">,</span> <span class="n">my_string</span><span class="p">)</span>
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 <div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># but the patterns are where these shine</span>
-<span class="n">re</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span><span class="s1">&#39;\d\d&#39;</span><span class="p">,</span> <span class="n">my_string</span><span class="p">)</span>
+<span class="n">re</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span><span class="sa">r</span><span class="s1">&#39;\d\d&#39;</span><span class="p">,</span> <span class="n">my_string</span><span class="p">)</span>
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