SyntaxError: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position 2640-2641: truncated \xXX escape

html = '''
  <!--                            
            <!--" title="-->
            <!--">-->
            <!----> 
            <!--                -->
            <p>The problem often encountered in collecting is the content layout problem. I spent some time writing a function that replaces html tags and styles with regular ones, and shared it.<br></p> 
            <p class="codetitle"><span><u>Copy the code The</u></span> code is as follows:</p> 
            <p class="codebody" id="code94529"><br>/** <br>* Format content <br>* @param string $content It’s better to use utf-8 encoding for the content <br>* @return string <br>*! This function needs to enable tidy extension <br>*/ <br>function removeFormat($content) { <br>$replaces = array ( <br>"/ /i” =&gt; ”, <br>“//i” =&gt; ”, <br>“/ <strong>/i” =&gt; ”, <br>“//i” =&gt; ”, <br>“/ <span>/i” =&gt; ”, <br>“//i” =&gt; ", <br>"/</span></strong></p>
            <strong> 
              <div>
               /i" =&gt; "
               <p></p> 
               <p>", <br>"//i" =&gt; "</p> 
               <p>", <br>"/&lt;!–*–&gt;/i"=&gt;", <br>/* "/</p> 
               <br>
               <br>
               <p></p>
               <br>
               <br>
               <p></p>
               <p></p>
               <p>', <br>“//i” =&gt; '</p>
               <p>', <br>"/</p>
               
                /i” =&gt; ”,//Don’t enable “//i” =&gt; ”, “/ /i” =&gt; ”, “//i” =&gt; ”, “/ /i” when there is a table content =&gt; '   
                  <table><tbody><tr><td>/i” =&gt; ”, */ <br>“/style=.+?['|\”]/i” =&gt; ”, <br>“/class=.+?['|\”]/i” =&gt; ”, <br>“ /id=.+?['|\”]/i”=&gt;”, <br>“/lang=.+?['|\”]/i”=&gt;”, <br>//”/width=.+?[' |\”]/i”=&gt;”,//Not easy to control and comment out <br>//”/height=.+?['|\”]/i”=&gt;”, <br>“/border=.+?['| \”]/I”=&gt;”, <br>“/face=.+?['|\”]/i”=&gt;”, <br>“/ <br>[]*/i” =&gt; “<p></p> <p>", <br>"/.*/i" =&gt; ", <br>"/ /i" =&gt; '',//Replace the space <br>"/</p> <p>[|\x{3000}|\r\n]*/ui” =&gt; '</p> <p> ',//Replace half-width, full-width spaces, line breaks, use to exclude encoding problems generated when writing to the database</p> <p>); <br>$config = array( <br>//'indent' =&gt; TRUE, //Whether to <br>indent'output-html' =&gt; TRUE,//Whether it is output xhtml'show <br>-body-only'=&gt;TRUE,//Whether Only get the body'wrap <br>' =&gt; 0 <br>); <br>$content = tidy_repair_string($content, $config,'utf8');//First use the tidy library that comes with php to repair the html tags, otherwise it is easy to appear when replacing A weird situation <br>$content = trim($content); <br>foreach ($replaces as $k =&gt; $v) { <br>$content = preg_replace ($k, $v, $content ); <br>}</p> <p> if(strpos($content,'</p> <p>')&gt;6)//Some content may be missing at the beginning</p> <p>Tag <br>$content = '</p> <p> '.$content;</p> <p>$content = tidy_repair_string($content, $config,'utf8');//Fix it again, you can remove the empty HTML tags <br>$content = trim($content); <br>return $content; <br>}</p> 
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                    <span class="flashwp-tags-links"><i class="fa fa-tags" aria-hidden="true"></i>Tagged php , do , content , use , typesetting , regular , of , often , expression , solve , parse , encounter , collect , problem , problem is</span> 
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                      <h4>Author:<span> Wang Di Nan Fei Yan</span></h4> 
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              '''
print(len(html))

出错
在字符串前面加上r
html = r'''
  <!--                            
            <!--" title="-->
            <!--">-->
            <!----> 
            <!--                -->
            <p>The problem often encountered in collecting is the content layout problem. I spent some time writing a function that replaces html tags and styles with regular ones, and shared it.<br></p> 
            <p class="codetitle"><span><u>Copy the code The</u></span> code is as follows:</p> 
            <p class="codebody" id="code94529"><br>/** <br>* Format content <br>* @param string $content It’s better to use utf-8 encoding for the content <br>* @return string <br>*! This function needs to enable tidy extension <br>*/ <br>function removeFormat($content) { <br>$replaces = array ( <br>"/ /i” =&gt; ”, <br>“//i” =&gt; ”, <br>“/ <strong>/i” =&gt; ”, <br>“//i” =&gt; ”, <br>“/ <span>/i” =&gt; ”, <br>“//i” =&gt; ", <br>"/</span></strong></p>
            <strong> 
              <div>
               /i" =&gt; "
               <p></p> 
               <p>", <br>"//i" =&gt; "</p> 
               <p>", <br>"/&lt;!–*–&gt;/i"=&gt;", <br>/* "/</p> 
               <br>
               <br>
               <p></p>
               <br>
               <br>
               <p></p>
               <p></p>
               <p>', <br>“//i” =&gt; '</p>
               <p>', <br>"/</p>
               
                /i” =&gt; ”,//Don’t enable “//i” =&gt; ”, “/ /i” =&gt; ”, “//i” =&gt; ”, “/ /i” when there is a table content =&gt; '   
                  <table><tbody><tr><td>/i” =&gt; ”, */ <br>“/style=.+?['|\”]/i” =&gt; ”, <br>“/class=.+?['|\”]/i” =&gt; ”, <br>“ /id=.+?['|\”]/i”=&gt;”, <br>“/lang=.+?['|\”]/i”=&gt;”, <br>//”/width=.+?[' |\”]/i”=&gt;”,//Not easy to control and comment out <br>//”/height=.+?['|\”]/i”=&gt;”, <br>“/border=.+?['| \”]/I”=&gt;”, <br>“/face=.+?['|\”]/i”=&gt;”, <br>“/ <br>[]*/i” =&gt; “<p></p> <p>", <br>"/.*/i" =&gt; ", <br>"/ /i" =&gt; '',//Replace the space <br>"/</p> <p>[|\x{3000}|\r\n]*/ui” =&gt; '</p> <p> ',//Replace half-width, full-width spaces, line breaks, use to exclude encoding problems generated when writing to the database</p> <p>); <br>$config = array( <br>//'indent' =&gt; TRUE, //Whether to <br>indent'output-html' =&gt; TRUE,//Whether it is output xhtml'show <br>-body-only'=&gt;TRUE,//Whether Only get the body'wrap <br>' =&gt; 0 <br>); <br>$content = tidy_repair_string($content, $config,'utf8');//First use the tidy library that comes with php to repair the html tags, otherwise it is easy to appear when replacing A weird situation <br>$content = trim($content); <br>foreach ($replaces as $k =&gt; $v) { <br>$content = preg_replace ($k, $v, $content ); <br>}</p> <p> if(strpos($content,'</p> <p>')&gt;6)//Some content may be missing at the beginning</p> <p>Tag <br>$content = '</p> <p> '.$content;</p> <p>$content = tidy_repair_string($content, $config,'utf8');//Fix it again, you can remove the empty HTML tags <br>$content = trim($content); <br>return $content; <br>}</p> 
                   <!-- .entry-content --> 
                   <!--    <div id="mycontentbehind">-->
                   <!--</div>--> 
                   <footer class="entry-footer flashwp-entry-bottom-block"> 
                    <span class="flashwp-tags-links"><i class="fa fa-tags" aria-hidden="true"></i>Tagged php , do , content , use , typesetting , regular , of , often , expression , solve , parse , encounter , collect , problem , problem is</span> 
                   </footer>
                   <!-- .entry-footer --> 
                   <div class="flashwp-author-bio flashwp-entry-bottom-block"> 
                    <div class="flashwp-author-bio-top"> 
                     <div class="flashwp-author-bio-gravatar"></div> 
                     <div class="flashwp-author-bio-text"> 
                      <h4>Author:<span> Wang Di Nan Fei Yan</span></h4> 
                     </div> 
                    </div> 
                   </div>   
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                          CSS <span class="tag-link-count">(3761)</span> 
                          echo <span class="tag-link-count">(2195)</span> 
                          function <span class="tag-link-count">(2103)</span> 
                          HTML <span class="tag-link-count">(5035)</span> 
                          http <span class="tag-link-count">(3264)</span> 
                          java <span class="tag-link-count">(6875)</span> 
                          JavaScript <span class="tag-link-count">(15131)</span> 
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                          JS <span class="tag-link-count">(6029)</span> 
                          linux <span class="tag-link-count">(4287)</span> 
                          lt <span class="tag-link-count">(4617)</span> 
                          mysql <span class="tag-link-count">(19269)</span> 
                          nbsp <span class="tag-link-count">(19559)</span> 
                          oracle <span class="tag-link-count">(6591)</span> 
                          php <span class="tag-link-count">(66964)</span> 
                          quot <span class="tag-link-count">(8503)</span> 
                          server <span class="tag-link-count">(2594)</span> 
                          session <span class="tag-link-count">(2365)</span> 
                          sql <span class="tag-link-count">(3953)</span> 
                          thinkphp <span class="tag-link-count">(3255)</span> 
                          a <span class="tag-link-count">( 3779)</span> 
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print(len(html))
输出 17513