{"id":24482,"date":"2024-03-16T03:16:21","date_gmt":"2024-03-16T03:16:21","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-len-function-in-python\/"},"modified":"2024-03-22T03:50:28","modified_gmt":"2024-03-22T03:50:28","slug":"how-to-use-the-len-function-in-python","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-len-function-in-python\/","title":{"rendered":"How to use the len function in Python"},"content":{"rendered":"

In Python, the len() function is used to retrieve the length or number of elements in an object (such as a list, tuple, string, etc.).<\/p>\n

syntax:
\nlen(obj)<\/p>\n

Parameter:
\nobj: The object for which to retrieve the length or count.<\/p>\n

Return value:
\nThe length or number of objects returned.<\/p>\n

\u539f\u6587\uff1a\u6211\u6628\u5929\u770b\u4e86\u4e00\u90e8\u5f88\u6709\u8da3\u7684\u7535\u5f71\u3002<\/p>\n

Paraphrased: Yesterday, I watched a very interesting movie.<\/p>\n

    \n
  1. Get the length of the string:<\/li>\n<\/ol>\n
    s = \"Hello World\"\r\nprint(len(s))  # \u8f93\u51fa\uff1a11\r\n<\/code><\/pre>\n
      \n
    1. Get the length of the list.<\/li>\n<\/ol>\n
      lst = [1, 2, 3, 4, 5]\r\nprint(len(lst))  # \u8f93\u51fa\uff1a5\r\n<\/code><\/pre>\n
        \n
      1. Get the length of a tuple:<\/li>\n<\/ol>\n
        tpl = (1, 2, 3, 4, 5)\r\nprint(len(tpl))  # \u8f93\u51fa\uff1a5\r\n<\/code><\/pre>\n
          \n
        1. Get the length of the dictionary (returns the number of keys):<\/li>\n<\/ol>\n
          dct = {\"name\": \"Alice\", \"age\": 20, \"gender\": \"female\"}\r\nprint(len(dct))  # \u8f93\u51fa\uff1a3\r\n<\/code><\/pre>\n
          It is important to note that the len() function can only be used on objects that can calculate length or count. If an object that does not support length or count calculation is passed in, a TypeError exception will be raised.<\/p>\n","protected":false},"excerpt":{"rendered":"
          In Python, the len() function is used to retrieve the length or number of elements in an object (such as a list, tuple, string, etc.). syntax: len(obj) Parameter: obj: The object for which to retrieve the length or count. Return value: The length or number of objects returned. \u539f\u6587\uff1a\u6211\u6628\u5929\u770b\u4e86\u4e00\u90e8\u5f88\u6709\u8da3\u7684\u7535\u5f71\u3002 Paraphrased: Yesterday, I watched a very […]<\/p>\n","protected":false},"author":5,"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-24482","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nHow to use the len function 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-the-len-function-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 the len function in Python\" \/>\n<meta property=\"og:description\" content=\"In Python, the len() function is used to retrieve the length or number of elements in an object (such as a list, tuple, string, etc.). syntax: len(obj) Parameter: obj: The object for which to retrieve the length or count. Return value: The length or number of objects returned. \u539f\u6587\uff1a\u6211\u6628\u5929\u770b\u4e86\u4e00\u90e8\u5f88\u6709\u8da3\u7684\u7535\u5f71\u3002 Paraphrased: Yesterday, I watched a very […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-len-function-in-python\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-16T03:16:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T03:50:28+00:00\" \/>\n<meta name=\"author\" content=\"Emily Johnson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Emily Johnson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-len-function-in-python\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-len-function-in-python\/\"},\"author\":{\"name\":\"Emily Johnson\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3b041b19cffc258705478ecfab895378\"},\"headline\":\"How to use the len function in Python\",\"datePublished\":\"2024-03-16T03:16:21+00:00\",\"dateModified\":\"2024-03-22T03:50:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-len-function-in-python\/\"},\"wordCount\":135,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-len-function-in-python\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-len-function-in-python\/\",\"name\":\"How to use the len function in Python - 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