{"id":3430,"date":"2021-04-23T13:25:32","date_gmt":"2021-04-23T07:55:32","guid":{"rendered":"https:\/\/python-programs.com\/?p=3430"},"modified":"2021-11-22T18:44:54","modified_gmt":"2021-11-22T13:14:54","slug":"python-check-if-string-is-empty-or-contain-spaces-only","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-check-if-string-is-empty-or-contain-spaces-only\/","title":{"rendered":"Python: Check if String is Empty or Contain Spaces only"},"content":{"rendered":"<p>Python strings are byte arrays representing characters of Unicode.. However, because Python lacks a character data type, a single character is simply a one-length string. Square brackets can be used to access string elements.<\/p>\n<p>Given a string, the task is to check whether the string is empty or not.<\/p>\n<p><strong>Example:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>string=\"\"<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">Given String is empty<\/pre>\n<h2>Check if String is Empty<\/h2>\n<p>There are several ways to check whether the string is empty some of them are:<\/p>\n<ul>\n<li><a href=\"#Using_len()_function\">Using len() function<\/a><\/li>\n<li><a href=\"#Using_not\">Using not<\/a><\/li>\n<li><a href=\"#Using_strip()\">Using strip()<\/a><\/li>\n<li><a href=\"#Using_isspace()\">Using isspace()<\/a><\/li>\n<\/ul>\n<h3 id=\"Using_len()_function\">Method #1:Using len() function<\/h3>\n<p>The most general method for checking for zero-length strings is to use len(). Despite the fact that it ignores the fact that a string with only spaces should be considered an empty string even if it is not zero.<\/p>\n<p>In Python, the len() function takes a sequence as an argument and returns the number of elements in that sequence. So, if we pass a string to the len() function as an argument, it returns the total number of characters in that string.<\/p>\n<p>So, we can use the len() function to determine whether a string is empty or not by determining whether the number of characters in the string is zero or not.<\/p>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># given string\r\nstring = \"\"\r\n# determining whether or not the given string is empty using len()\r\nif len(string) == 0:\r\n    print(\"Givem String is empty\")\r\nelse:\r\n    print(\"Given String is not empty\")\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">Given String is empty<\/pre>\n<h3 id=\"Using_not\">Method #2:Using not<\/h3>\n<p>The not operator can do the same thing as len() and search for 0 length strings, but it also considers strings with only spaces to be non-empty, which isn&#8217;t realistic.<\/p>\n<p>In Python, an empty string is equivalent to False. So, to see if a string is empty or not, we can use the \u201cnot\u201d operator, .<\/p>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># given string\r\nstring = \"\"\r\n#  determining whether or not the given string is empty\r\nif not string:\r\n    print(\"Given String is empty\")\r\nelse:\r\n    print(\"Given String is not empty\")\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">Given String is empty<\/pre>\n<h3>Check whether string is empty\/contain spaces<\/h3>\n<h3 id=\"Using_strip()\">Using strip()<\/h3>\n<p>To get a copy of a string without leading and trailing white spaces, we can use the string&#8217;s strip() function. So, let&#8217;s use this to see if the string is empty or only contains white spaces.<\/p>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\"># given string\r\nstring = \" \"\r\n#  determining whether or not the given string is empty\r\nif string and string.strip():\r\nprint(\"Given String is not empty\")\r\nelse:\r\nprint(\"Given String is empty\")\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">Given String is empty<\/pre>\n<h3 id=\"Using_isspace()\">Using isspace()<\/h3>\n<p>The string class&#8217;s isspace() function returns True if the string only contains white spaces. So we can use this to see if a string is empty or only contains white spaces.<\/p>\n<p>To get a copy of a string without leading and trailing white spaces, we can use the string&#8217;s strip() function. So, let&#8217;s use this to see if the string is empty or only contains white spaces.<\/p>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\"># given string\r\nstring = \"      \"\r\n#  determining whether or not the given string is empty\r\nif string and not string.isspace():\r\n    print(\"Given String is not empty\")\r\nelse:\r\n    print(\"Given String is  empty\")\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">Given String is empty<\/pre>\n<p><strong>Related Programs<\/strong>:<\/p>\n<ul>\n<li><a href=\"https:\/\/python-programs.com\/python-check-if-a-list-is-empty-or-not\/\">python check if a list is empty or not<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-program-to-check-if-a-string-is-palindrome-or-not\/\">python program to check if a string is palindrome or not<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-program-to-check-if-a-string-is-a-pangram-or-not\/\">python program to check if a string is a pangram or not<\/li>\n<li><a href=\"https:\/\/python-programs.com\/java-program-to-check-the-string-is-null-or-empty\/\">java program to check the string is null or empty<\/li>\n<li><a href=\"https:\/\/python-programs.com\/check-if-type-of-a-variable-is-string-in-python\/\">check if type of a variable is string in python<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-three-ways-to-check-if-a-file-is-empty\/\">python three ways to check if a file is empty<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-check-if-dictionary-is-empty\/\">python check if dictionary is empty<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Python strings are byte arrays representing characters of Unicode.. However, because Python lacks a character data type, a single character is simply a one-length string. Square brackets can be used to access string elements. Given a string, the task is to check whether the string is empty or not. Example: Input: string=&#8221;&#8221; Output: Given String &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-check-if-string-is-empty-or-contain-spaces-only\/\"> <span class=\"screen-reader-text\">Python: Check if String is Empty or Contain Spaces only<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python: Check if String is Empty or Contain Spaces only - Python Programs<\/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:\/\/python-programs.com\/python-check-if-string-is-empty-or-contain-spaces-only\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python: Check if String is Empty or Contain Spaces only - Python Programs\" \/>\n<meta property=\"og:description\" content=\"Python strings are byte arrays representing characters of Unicode.. 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