{"id":1999,"date":"2020-12-29T02:55:46","date_gmt":"2020-12-29T02:55:46","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=1999"},"modified":"2020-12-29T02:58:11","modified_gmt":"2020-12-29T02:58:11","slug":"python-string-isalnum","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-string-methods\/python-string-isalnum\/","title":{"rendered":"Python String isalnum()"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the Python string <code>isalnum()<\/code> method to check if all characters in the string are alphanumeric.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-python-string-isalnum-method'>Introduction to the Python string isalnum() method <a href=\"#introduction-to-the-python-string-isalnum-method\" class=\"anchor\" id=\"introduction-to-the-python-string-isalnum-method\" title=\"Anchor for Introduction to the Python string isalnum() method\">#<\/a><\/h2>\n\n\n\n<p>The <a href=\"https:\/\/www.pythontutorial.net\/python-basics\/python-string\/\">string<\/a> <code>isalnum()<\/code> method returns <code>True<\/code> if:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>all characters in the string are alphanumeric<\/li><li>and the string has at least one character.<\/li><\/ul>\n\n\n\n<p>Otherwise, it returns <code>False<\/code>.<\/p>\n\n\n\n<p>The following shows the syntax of the <code>isalnum()<\/code> method:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"CSS\" data-shcb-language-slug=\"css\"><span><code class=\"hljs language-css\"><span class=\"hljs-selector-tag\">str<\/span><span class=\"hljs-selector-class\">.isalnum<\/span>()<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">CSS<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">css<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Functionally, the string <code>str<\/code> contains only alphanumeric characters if one of the following methods returns <code>True<\/code>:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.pythontutorial.net\/python-string-methods\/python-string-isalpha\/\">str.isalpha()<\/a><\/li><li><a href=\"https:\/\/www.pythontutorial.net\/python-string-methods\/python-string-isnumeric\/\">str.isnumeric()<\/a><\/li><li><a href=\"https:\/\/www.pythontutorial.net\/python-string-methods\/python-string-isdecimal\/\">str.isdecimal()<\/a><\/li><li><a href=\"https:\/\/www.pythontutorial.net\/python-string-methods\/python-string-isalpha\/\">str.isalpha()<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='python-string-isalnum-examples'>Python string isalnum() examples <a href=\"#python-string-isalnum-examples\" class=\"anchor\" id=\"python-string-isalnum-examples\" title=\"Anchor for Python string isalnum() examples\">#<\/a><\/h2>\n\n\n\n<p>The following example uses the <code>isalnum()<\/code> method to check if the string <code>'Python3'<\/code> contains only alphanumeric characters:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">version = <span class=\"hljs-string\">'Python3'<\/span>\nresult = version.isalnum()\n\n<span class=\"hljs-keyword\">print<\/span>(result)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/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-3\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">True<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>It returns <code>True<\/code> because the string <code>'Python3'<\/code> contains only letters and numbers.<\/p>\n\n\n\n<p>The following example returns <code>False<\/code> because the string <code>'Python 3'<\/code> contains a whitespace:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">version = <span class=\"hljs-string\">'Python 3'<\/span>\nresult = version.isalnum()\n\n<span class=\"hljs-keyword\">print<\/span>(result)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/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-5\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">False<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" 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>Use the Python string <code>isalnum()<\/code> method to determine if all characters in the string are alphanumeric.<\/li><\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial helpful ?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"1999\"\n\t\t\t\tdata-post-url=\"https:\/\/www.pythontutorial.net\/python-string-methods\/python-string-isalnum\/\"\n\t\t\t\tdata-post-title=\"Python String isalnum()\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 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method to check if all characters in the string are alphanumeric. Introduction to the Python string isalnum() method # The string isalnum() method returns True if: all characters in the string are alphanumeric and the string has at least one character. Otherwise, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1925,"menu_order":24,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1999","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/1999","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=1999"}],"version-history":[{"count":0,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/1999\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/1925"}],"wp:attachment":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/media?parent=1999"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}