{"id":3188,"date":"2021-12-02T04:23:11","date_gmt":"2021-12-02T04:23:11","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=3188"},"modified":"2022-02-18T00:58:22","modified_gmt":"2022-02-18T00:58:22","slug":"python-regex-capturing-group","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-regex\/python-regex-capturing-group\/","title":{"rendered":"Python Regex Capturing Group"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn about Python regex capturing groups to create subgroups for a match.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"introduction-to-the-python-regex-capturing-groups\" id='introduction-to-the-python-regex-capturing-groups'>Introduction to the Python regex capturing groups <a href=\"#introduction-to-the-python-regex-capturing-groups\" class=\"anchor\" id=\"introduction-to-the-python-regex-capturing-groups\" title=\"Anchor for Introduction to the Python regex capturing groups\">#<\/a><\/h2>\n\n\n\n<p>Suppose you have the following path that shows the news with the id 100 on a website:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">news\/<span class=\"hljs-number\">100<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following <a href=\"https:\/\/www.pythontutorial.net\/python-regex\/python-regular-expressions\/\">regular expression<\/a> matches the above path:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">\\w+\/\\d+<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p class=\"note\">Note that the above regular expression also matches any path that starts with one or more word characters, e.g., <code>posts<\/code>, <code>todos<\/code>, etc. not just <code>news<\/code>.<\/p>\n\n\n\n<p>In this pattern:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>\\w+<\/code> is a word <a href=\"https:\/\/www.pythontutorial.net\/python-regex\/python-regex-character-set\/\">character set<\/a> with a <a href=\"https:\/\/www.pythontutorial.net\/python-regex\/python-regex-quantifiers\/\">quantifier<\/a> (+) that matches one or more word characters.<\/li><li><code>\/<\/code> mathes the forward slash <code>\/<\/code> character.<\/li><li><code>\\d+<\/code> is digit character set with a quantfifer (<code>+<\/code>) that matches one or more digits.<\/li><\/ul>\n\n\n\n<p>The following program uses the \\w+\/\\d+ pattern to match the string &#8216;<code>news\/100'<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> re\n\ns = <span class=\"hljs-string\">'news\/100'<\/span>\npattern = <span class=\"hljs-string\">'\\w+\/\\d+'<\/span>\n\nmatches = re.finditer(pattern,s)\n<span class=\"hljs-keyword\">for<\/span> match <span class=\"hljs-keyword\">in<\/span> matches:\n    print(match)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">&lt;re.Match object; span=(<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">8<\/span>), match=<span class=\"hljs-string\">'news\/100'<\/span>&gt;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>It shows one match as expected.<\/p>\n\n\n\n<p>To get the <code>id<\/code> from the path, you use a capturing group. To define a capturing group for a pattern, you place the rule in parentheses<code>:<\/code><\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">(rule)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>For example, to create a capturing group that captures the <code>id<\/code> from the path, you use the following pattern:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-string\">'\\w+\/(\\d+)'<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this pattern, we place the rule <code>\\d+<\/code> inside the parentheses <code>()<\/code>. If you run the program with the new pattern, you&#8217;ll see that it displays one match:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> re\n\ns = <span class=\"hljs-string\">'news\/100'<\/span>\npattern = <span class=\"hljs-string\">'\\w+\/(\\d+)'<\/span>\n\nmatches = re.finditer(pattern, s)\n<span class=\"hljs-keyword\">for<\/span> match <span class=\"hljs-keyword\">in<\/span> matches:\n    print(match)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">&lt;re.Match object; span=(<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">8<\/span>), match=<span class=\"hljs-string\">'news\/100'<\/span>&gt;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>To get the capturing groups from a match, you the <code>group()<\/code> method of the <code>Match<\/code> object:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">match.group(index)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>group(0)<\/code> will return the entire match while the <code>group(1)<\/code>, <code>group(2)<\/code>, etc., return the first, second, &#8230; group.<\/p>\n\n\n\n<p>The <code>lastindex<\/code> property of the <code>Match<\/code> object returns the last index of all subgroups. The following program shows the entire match (<code>group(0)<\/code>) and all the subgroups:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> re\n\ns = <span class=\"hljs-string\">'news\/100'<\/span>\npattern = <span class=\"hljs-string\">'\\w+\/(\\d+)'<\/span>\n\nmatches = re.finditer(pattern, s)\n<span class=\"hljs-keyword\">for<\/span> match <span class=\"hljs-keyword\">in<\/span> matches:\n    <span class=\"hljs-keyword\">for<\/span> index <span class=\"hljs-keyword\">in<\/span> range(<span class=\"hljs-number\">0<\/span>, match.lastindex + <span class=\"hljs-number\">1<\/span>):\n        print(match.group(index))<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">news\/<span class=\"hljs-number\">100<\/span>\n<span class=\"hljs-number\">100<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In the output, the <code>news\/100<\/code> is the entire match while <code>100<\/code> is the subgroup.<\/p>\n\n\n\n<p>If you want to capture also the resource (<code>news<\/code>) in the path (<code>news\/100<\/code>), you can create an additional capturing group like this:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-12\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-string\">'(\\w+)\/(\\d+)'<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this pattern, we have two capturing groups one for <code>\\w+<\/code> and the other for <code>\\d+<\/code> . The following program shows the entire match and all the subgroups:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-13\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> re\n\ns = <span class=\"hljs-string\">'news\/100'<\/span>\npattern = <span class=\"hljs-string\">'(\\w+)\/(\\d+)'<\/span>\n\nmatches = re.finditer(pattern, s)\n<span class=\"hljs-keyword\">for<\/span> match <span class=\"hljs-keyword\">in<\/span> matches:\n    <span class=\"hljs-keyword\">for<\/span> index <span class=\"hljs-keyword\">in<\/span> range(<span class=\"hljs-number\">0<\/span>, match.lastindex + <span class=\"hljs-number\">1<\/span>):\n        print(match.group(index))<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-14\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">news\/<span class=\"hljs-number\">100<\/span>\nnews\n<span class=\"hljs-number\">100<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-14\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In the output, the <code>news\/100<\/code> is the entire match while <code>news<\/code> and <code>100<\/code> are the subgroups.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"named-capturing-groups\" id='named-capturing-groups'>Named capturing groups <a href=\"#named-capturing-groups\" class=\"anchor\" id=\"named-capturing-groups\" title=\"Anchor for Named capturing groups\">#<\/a><\/h2>\n\n\n\n<p>By default, you can access a subgroup in a match using an index, for example, <code>match.group(1)<\/code>. Sometimes, accessing a subgroup by a meaningful name is more convenient.<\/p>\n\n\n\n<p>You use the named capturing group to assign a name to a group. The following shows the syntax for assigning a name to a capturing group:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-15\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">(?P&lt;name&gt;rule)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-15\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>()<\/code> indicates a capturing group.<\/li><li><code>?P&lt;name&gt;<\/code> specifies the name of the capturing group.<\/li><li><code>rule<\/code> is a rule in the pattern.<\/li><\/ul>\n\n\n\n<p>For example, the following creates the names:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-16\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-string\">'(?P&lt;resource&gt;\\w+)\/(?P&lt;id&gt;\\d+)'<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-16\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this syntax, the <code>resource<\/code> is the name for the first capturing group and the <code>id<\/code> is the name for the second capturing group.<\/p>\n\n\n\n<p>To get all the named subgroups of a match, you use the <code>groupdict()<\/code> method of the <code>Match<\/code> object. For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-17\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> re\n\ns = <span class=\"hljs-string\">'news\/100'<\/span>\npattern = <span class=\"hljs-string\">'(?P&lt;resource&gt;\\w+)\/(?P&lt;id&gt;\\d+)'<\/span>\n\nmatches = re.finditer(pattern, s)\n<span class=\"hljs-keyword\">for<\/span> match <span class=\"hljs-keyword\">in<\/span> matches:\n    print(match.groupdict())<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-17\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-18\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">{<span class=\"hljs-string\">'resource'<\/span>: <span class=\"hljs-string\">'news'<\/span>, <span class=\"hljs-string\">'id'<\/span>: <span class=\"hljs-string\">'100'<\/span>}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-18\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this example, the <code>groupdict()<\/code> method returns a dictionary where the keys are group names and values are the subgroups.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"more-named-capturing-group-example\" id='more-named-capturing-group-example'>More named capturing group example <a href=\"#more-named-capturing-group-example\" class=\"anchor\" id=\"more-named-capturing-group-example\" title=\"Anchor for More named capturing group example\">#<\/a><\/h3>\n\n\n\n<p>The following pattern:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-19\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">\\w+\/d{<span class=\"hljs-number\">4<\/span>}\/d{<span class=\"hljs-number\">2<\/span>}\/d{<span class=\"hljs-number\">2<\/span>}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-19\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>matches this path:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-20\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">news\/<span class=\"hljs-number\">2021<\/span>\/<span class=\"hljs-number\">12<\/span>\/<span class=\"hljs-number\">31<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-20\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>And you can add the named capturing groups to the pattern like this:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-21\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-string\">'(?P&lt;resource&gt;\\w+)\/(?P&lt;year&gt;\\d{4})\/(?P&lt;month&gt;\\d{1,2})\/(?P&lt;day&gt;\\d{1,2})'<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-21\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>This program uses the patterns to match the path and shows all the subgroups:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-22\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> re\n\ns = <span class=\"hljs-string\">'news\/2021\/12\/31'<\/span>\npattern = <span class=\"hljs-string\">'(?P&lt;resource&gt;\\w+)\/(?P&lt;year&gt;\\d{4})\/(?P&lt;month&gt;\\d{1,2})\/(?P&lt;day&gt;\\d{1,2})'<\/span>\n\nmatches = re.finditer(pattern, s)\n<span class=\"hljs-keyword\">for<\/span> match <span class=\"hljs-keyword\">in<\/span> matches:\n    print(match.groupdict())<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-22\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-23\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">{<span class=\"hljs-string\">'resource'<\/span>: <span class=\"hljs-string\">'news'<\/span>, <span class=\"hljs-string\">'year'<\/span>: <span class=\"hljs-string\">'2021'<\/span>, <span class=\"hljs-string\">'month'<\/span>: <span class=\"hljs-string\">'12'<\/span>, <span class=\"hljs-string\">'day'<\/span>: <span class=\"hljs-string\">'31'<\/span>}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-23\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"summary\" id='summary'>Summary <a href=\"#summary\" class=\"anchor\" id=\"summary\" title=\"Anchor for Summary\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Place a rule of a pattern inside parentheses () to create a capturing group.<\/li><li>Use the <code>group()<\/code> method of the <code>Match<\/code> object to get the subgroup by an index.<\/li><li>Use the <code>(?P&lt;name&gt;rule)<\/code> to create a named capturing group for the rule in a pattern.<\/li><li>Use the <code>groupdict()<\/code> method of the <code>Match<\/code> object to get the named subgroups as a dictionary.<\/li><\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial 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match<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3122,"menu_order":8,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3188","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/3188","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/comments?post=3188"}],"version-history":[{"count":0,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/3188\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/3122"}],"wp:attachment":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/media?parent=3188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}