{"id":2089,"date":"2022-06-30T19:00:41","date_gmt":"2022-06-30T13:30:41","guid":{"rendered":"https:\/\/pythonarray.com\/?p=2089"},"modified":"2022-07-06T15:14:14","modified_gmt":"2022-07-06T09:44:14","slug":"python-string-methods-for-string-manipulation","status":"publish","type":"post","link":"https:\/\/pythonarray.com\/python-string-methods-for-string-manipulation\/","title":{"rendered":"Python String Methods for String Manipulation"},"content":{"rendered":"<p>String Manipulation is the most essential skill when you are analyzing text data. Python has many built in methods for string manipulation.\u00a0 In this article, we will study the most frequently used python string methods for string manipulation.<\/p>\n<h3>Python String Method to Capitalize a word<\/h3>\n<p>To capitalize the first letter of a string in python we use<code>\u00a0capitalize()<\/code>\u00a0method.\u00a0<code>capitalize()<\/code>\u00a0method returns a new string in which the first letter of the string is capitalized. In this process, No change is made to the original string.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"python\"\r\nprint(\"Original String:\")\r\nprint(myString)\r\nnewString=myString.capitalize()\r\nprint(\"New modified string:\")\r\nprint(newString)\r\nprint(\"original string after modification:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>Original String:\r\npython\r\nNew modified string:\r\nPython\r\noriginal string after modification:\r\npython<\/pre>\n<p>In the output, we can see that first letter of the new string has been modified but no changes have been made to string on which the method was invoked.<\/p>\n<ul>\n<li><a href=\"https:\/\/pythonarray.com\/python-programming-string-functions\/\">Python Programming \u2013 String Functions<\/a><\/li>\n<li><a href=\"https:\/\/pythonarray.com\/how-to-split-string-variables-in-python\/\">How to split string variables in Python<\/a><\/li>\n<li><a href=\"https:\/\/pythonarray.com\/python-programming-string-functions-and-methods\/\">Python Programming \u2013 String Functions and Methods<\/a><\/li>\n<\/ul>\n<h3>Python String Method to capitalize first character of each word<\/h3>\n<p>To convert first character of each word into capital letter, we can use title() method. When invoked on a string, it capitalizes first character of each word of input string and returns a new string with the result. It doesn\u2019t affects the original string.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"Python is a great language\" \r\nnewString=myString.title()\r\nprint(\"Original string is:\")\r\nprint(myString)\r\nprint(\"Output is:\")\r\nprint(newString)<\/pre>\n<p>Output:<\/p>\n<pre>Original string is:\r\nPython is a great language\r\nOutput is:\r\nPython Is A Great Language<\/pre>\n<h3>How to convert string into lowercase in Python?<\/h3>\n<p><code>casefold()<\/code>\u00a0method returns a new string when invoked on a python string and turns every letter of original string into lowercase. It doesn\u2019t change the original string. This python string method can be used for preprocessing the text if it contains irregular use of capital or small letters.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"PytHon\"\r\nprint(\"Original String:\")\r\nprint(myString)\r\nnewString=myString.casefold()\r\nprint(\"New modified string:\")\r\nprint(newString)\r\nprint(\"original string after modification:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>Original String:\r\nPytHon\r\nNew modified string:\r\npython\r\noriginal string after modification:\r\nPytHon<\/pre>\n<p>Another method to convert strings into lowercase is the\u00a0<code>lower()<\/code>\u00a0method. It also coverts letters in the text string into lowercase and returns a new string.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"PytHon\"\r\nprint(\"Original String:\")\r\nprint(myString)\r\nnewString=myString.lower()\r\nprint(\"New modified string:\")\r\nprint(newString)\r\nprint(\"original string after modification:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>Original String:\r\nPytHon\r\nNew modified string:\r\npython\r\noriginal string after modification:\r\nPytHon<\/pre>\n<h3>How to convert Strings into uppercase in Python?<\/h3>\n<p>We can use\u00a0<code>upper()<\/code>\u00a0method to convert an input string into uppercase. When the\u00a0<code>upper()\u00a0<\/code>method is invoked on any string, it returns a new string with all the letter capitalized. It doesn\u2019t change the original string.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"PytHon\"\r\nprint(\"Original String:\")\r\nprint(myString)\r\nnewString=myString.upper()\r\nprint(\"New modified string:\")\r\nprint(newString)\r\nprint(\"original string after modification:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>Original String:\r\nPytHon\r\nNew modified string:\r\nPYTHON\r\noriginal string after modification:\r\nPytHon<\/pre>\n<p>There is another method named\u00a0<code>swapcase()<\/code>\u00a0which swaps the case of every letter in the input string and returns a new string. It doesn\u2019t make any change to the input string on which it is invoked.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"PytHon\"\r\nprint(\"Original String:\")\r\nprint(myString)\r\nnewString=myString.swapcase()\r\nprint(\"New modified string:\")\r\nprint(newString)\r\nprint(\"original string after modification:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>Original String:\r\nPytHon\r\nNew modified string:\r\npYThON\r\noriginal string after modification:\r\nPytHon<\/pre>\n<h3>How to Split Strings in python?<\/h3>\n<p>To split strings in python, we use\u00a0<code>split()<\/code>\u00a0method.\u00a0Python split\u00a0method takes an optional separator and splits the input string at the points where a separator is present and returns a list containing the splitted parts of the string.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"I am A Python String\"\r\nprint(\"Original String:\")\r\nprint(myString)\r\nnewList=myString.split()\r\nprint(\"New List:\")\r\nprint(newList)\r\nprint(\"when 'A' is declared as separator:\")\r\naList=myString.split(\"A\")\r\nprint(aList)\r\nprint(\"original string after modification:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>Original String:\r\nI am A Python String\r\nNew List:\r\n['I', 'am', 'A', 'Python', 'String']\r\nwhen 'A' is declared as separator:\r\n['I am ', ' Python String']\r\noriginal string after modification:\r\nI am A Python String<\/pre>\n<p>If we want to split a string for certain number of times, we can use\u00a0<code>rsplit()<\/code>\u00a0method instead of\u00a0<code>split()<\/code>\u00a0method.\u00a0<code>rsplit()<\/code>\u00a0method takes an extra argument named\u00a0<code>maxsplit\u00a0<\/code>which is the number of times the string has to be split. The input string is split at\u00a0<code>maxsplit\u00a0<\/code>places from right side of the string and a list with\u00a0<code>maxsplit+1<\/code>\u00a0fragments of the input string is returned by the\u00a0<code>rsplit()<\/code>\u00a0method. If no value is passed to\u00a0<code>maxsplit\u00a0<\/code>argument, the\u00a0<code>rsplit()<\/code>\u00a0method works the same as\u00a0<code>split()\u00a0<\/code>method.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"I am A Python String\"\r\nprint(\"Original String:\")\r\nprint(myString)\r\nnewList=myString.rsplit()\r\nprint(\"New List without maxsplit:\")\r\nprint(newList)\r\nprint(\"when maxsplit is set at 2:\")\r\naList=myString.rsplit(maxsplit=2)\r\nprint(aList)\r\nprint(\"original string after modification:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>Original String:\r\nI am A Python String\r\nNew List without maxsplit:\r\n['I', 'am', 'A', 'Python', 'String']\r\nwhen maxsplit is set at 2:\r\n['I am A', 'Python', 'String']\r\noriginal string after modification:\r\nI am A Python String<\/pre>\n<h3>How to Concatenate Strings in Python?<\/h3>\n<p>Now that we have seen how to split the strings, it may be a case that we need to perform\u00a0string concatenation\u00a0in python. We can concatenate two strings using<code>\u00a0\"+\"<\/code>\u00a0operator as well as using\u00a0<code>join()<\/code>\u00a0method.<\/p>\n<p>While using\u00a0<code>\"+\"<\/code>\u00a0operator, we just add the different strings using\u00a0<code>\"+\"<\/code>\u00a0operator and assign it to a new string. Here we can concatenate any number of strings in single statements by using\u00a0<code>\"+\"<\/code>\u00a0operator between them.<\/p>\n<p>Example:<\/p>\n<pre>myString1=\"I am a \"\r\nprint (\"first string is:\")\r\nprint(myString1)\r\nmyString2=\"Python String\"\r\nprint(\"Second String is:\")\r\nprint(myString2)\r\nmyString=myString1+myString2\r\nprint(\"Conactenated string is:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>myString1=\"I am a \"\r\nprint (\"first string is:\")\r\nprint(myString1)\r\nmyString2=\"Python String\"\r\nprint(\"Second String is:\")\r\nprint(myString2)\r\nmyString=myString1+myString2\r\nprint(\"Conactenated string is:\")\r\nprint(myString)<\/pre>\n<p>We can also concatenate strings using join method in python. Join method is invoked on a string which is separator and a list or any other iterable of strings is passed to it for joining. It returns a new string containing words in the iterable, separated by the separator string.<\/p>\n<p>Example:<\/p>\n<pre>myStringList=[\"I\",\"am\",\"a\",\"python\",\"string\"]\r\nprint (\"list of string is:\")\r\nprint(myStringList)\r\nseparator=\" \"#space is used as separator\r\nmyString=separator.join(myStringList)\r\nprint(\"Concatenated string is:\")\r\nprint(myString)<\/pre>\n<p>Output:<\/p>\n<pre>list of string is:\r\n['I', 'am', 'a', 'python', 'string']\r\nConcatenated string is:\r\nI am a python string<\/pre>\n<h3>How to trim Strings in Python?<\/h3>\n<p>There may be chances that strings are containing extra spaces in the start or end. We can remove those spaces using python string methods namely\u00a0<code>strip()<\/code>,\u00a0<code>lstrip()<\/code>\u00a0and\u00a0<code>rstrip()<\/code>.<\/p>\n<p><code>lstrip()<\/code>\u00a0method removes spaces from start of the input string and returns a new string.<\/p>\n<p><code>rstrip()<\/code>\u00a0removes spaces from the end of the string and returns a new string.<\/p>\n<p><code>strip()<\/code>\u00a0method removes spaces from both the start and end of the input string and returns a new string.<\/p>\n<p>Example:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">myString=\"          Python          \" \r\nlstring=myString.lstrip()\r\nrstring=myString.rstrip()\r\nstring =myString.strip()\r\nprint(\"Left Stripped string is:\",end=\"\")\r\nprint(lstring)\r\nprint(\"Right Stripped string is:\",end=\"\")\r\nprint(rstring)\r\nprint(\"Totally Stripped string is:\",end=\"\")\r\nprint(string)<\/pre>\n<p>Output:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">Left Stripped string is:Python          \r\nRight Stripped string is:          Python\r\nTotally Stripped string is:Python<\/pre>\n<h3>Python String Methods to split a string at newlines.<\/h3>\n<p>By using\u00a0<code>splitlines()\u00a0<\/code>method in python, we can convert a string into a list of sentences. The function splits the input string at linebreaks or newlines and returns a new list containing all the fragments of the input string.<\/p>\n<p>Example:<\/p>\n<pre>myString=\"Python is a great language.\\n I love python\" \r\nslist=myString.splitlines()\r\nprint(\"Original string is:\")\r\nprint(myString)\r\nprint(\"Output is:\")\r\nprint(slist)<\/pre>\n<p>Output:<\/p>\n<pre>Original string is:\r\nPython is a great language.\r\nI love python\r\nOutput is:\r\n['Python is a great language.', ' I love python']<\/pre>\n<h3>Conclusion<\/h3>\n<p>In this article, we have seen python string methods to manipulate the string data in python. We have seen how to split, strip, and concatenate the strings using different methods. We have also seen how to change case of letters in the strings. Stay tuned for more informative articles.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>String Manipulation is the most essential skill when you are analyzing text data. Python has many built in methods for string manipulation.\u00a0 In this article, we will study the most frequently used python string methods for string manipulation. Python String Method to Capitalize a word To capitalize the first letter of a string in python&hellip;<\/p>\n","protected":false},"author":1,"featured_media":3678,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[2],"tags":[],"jetpack_featured_media_url":"https:\/\/pythonarray.com\/wp-content\/uploads\/2021\/07\/Python-String-Methods-for-String-Manipulation.png","jetpack-related-posts":[{"id":494,"url":"https:\/\/pythonarray.com\/python-programming-string-functions\/","url_meta":{"origin":2089,"position":0},"title":"Python Programming \u2013 String Functions","date":"June 12, 2022","format":false,"excerpt":"You can learn about\u00a0Functions in Python\u00a0Programs with Outputs helped you to understand the language better. 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The quotes are not a part\u2026","rel":"","context":"In &quot;Python&quot;","img":{"alt_text":"Python Programming - Logical and Physical Line","src":"https:\/\/i1.wp.com\/pythonarray.com\/wp-content\/uploads\/2021\/05\/Python-Programming-Logical-and-Physical-Line.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/posts\/2089"}],"collection":[{"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/comments?post=2089"}],"version-history":[{"count":2,"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/posts\/2089\/revisions"}],"predecessor-version":[{"id":3680,"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/posts\/2089\/revisions\/3680"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/media\/3678"}],"wp:attachment":[{"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/media?parent=2089"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/categories?post=2089"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pythonarray.com\/wp-json\/wp\/v2\/tags?post=2089"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}