{"id":25560,"date":"2024-03-16T05:14:26","date_gmt":"2024-03-16T05:14:26","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-isinstance-in-python\/"},"modified":"2024-03-22T06:28:12","modified_gmt":"2024-03-22T06:28:12","slug":"how-to-use-isinstance-in-python","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-isinstance-in-python\/","title":{"rendered":"How to use isinstance in Python"},"content":{"rendered":"<p>The &#8216;isinstance()&#8217; function is one of the built-in functions in Python, used to check if an object belongs to a specified type.<\/p>\n<p>Check if the object belongs to the specified class.<\/p>\n<p>In this case, the object is the item to be checked, and classinfo can be a type, a tuple of types, or a list of types.<\/p>\n<p>Return True if the object is of the type specified by classinfo or one of its subclasses, otherwise return False.<\/p>\n<p>\u539f\u6587\uff1a\u6211\u4e0d\u662f\u7279\u522b\u559c\u6b22\u5403\u6d77\u9c9c\u3002<br \/>\n\u6f5c\u5728\u7684\u7ffb\u8bd1\uff1aI&#8217;m not particularly fond of seafood.<\/p>\n<pre class=\"post-pre\"><code>x = <span class=\"hljs-number\">5<\/span>\r\ny = <span class=\"hljs-string\">\"hello\"<\/span>\r\nz = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>]\r\n\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-built_in\">isinstance<\/span>(x, <span class=\"hljs-built_in\">int<\/span>))  <span class=\"hljs-comment\"># True\uff0cx\u662f\u6574\u6570\u7c7b\u578b<\/span>\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-built_in\">isinstance<\/span>(y, <span class=\"hljs-built_in\">str<\/span>))  <span class=\"hljs-comment\"># True\uff0cy\u662f\u5b57\u7b26\u4e32\u7c7b\u578b<\/span>\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-built_in\">isinstance<\/span>(z, <span class=\"hljs-built_in\">list<\/span>))  <span class=\"hljs-comment\"># True\uff0cz\u662f\u5217\u8868\u7c7b\u578b<\/span>\r\n\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-built_in\">isinstance<\/span>(x, <span class=\"hljs-built_in\">str<\/span>))  <span class=\"hljs-comment\"># False\uff0cx\u4e0d\u662f\u5b57\u7b26\u4e32\u7c7b\u578b<\/span>\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-built_in\">isinstance<\/span>(y, <span class=\"hljs-built_in\">int<\/span>))  <span class=\"hljs-comment\"># False\uff0cy\u4e0d\u662f\u6574\u6570\u7c7b\u578b<\/span>\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-built_in\">isinstance<\/span>(z, <span class=\"hljs-built_in\">tuple<\/span>))  <span class=\"hljs-comment\"># False\uff0cz\u4e0d\u662f\u5143\u7ec4\u7c7b\u578b<\/span>\r\n<\/code><\/pre>\n<p>It should be noted that if classinfo is a tuple or list of types, it will return True if the object belongs to any of the types.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The &#8216;isinstance()&#8217; function is one of the built-in functions in Python, used to check if an object belongs to a specified type. Check if the object belongs to the specified class. In this case, the object is the item to be checked, and classinfo can be a type, a tuple of types, or a list [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-25560","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to use isinstance in Python - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-use-isinstance-in-python\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to use isinstance in Python\" \/>\n<meta property=\"og:description\" content=\"The &#8216;isinstance()&#8217; function is one of the built-in functions in Python, used to check if an object belongs to a specified type. 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