{"id":1861,"date":"2020-12-26T13:16:02","date_gmt":"2020-12-26T13:16:02","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=1861"},"modified":"2020-12-28T03:22:22","modified_gmt":"2020-12-28T03:22:22","slug":"python-titlecase","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-string-methods\/python-titlecase\/","title":{"rendered":"Python String Titlecase"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to use the Python string title()<\/code> method to convert a string to titlecase.<\/p>\n\n\n\n

Introduction to the Python title() method #<\/a><\/h2>\n\n\n\n

The titlecase is a capitalization style used for titles so that the first letter of each word is uppercase<\/a> and the remaining letters are lowercase<\/a>. For example:<\/p>\n\n\n

Python Title Case<\/span> Tutorial<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
The rules for the titlecase, however, are not universally standardized.<\/p>\n\n\n\n
To make titlecased version of a string, you use the string title()<\/code> method. The title()<\/code> returns a copy of a string in the titlecase.<\/p>\n\n\n\n
The title()<\/code> method converts the first character of each words to uppercase and the remaining characters in lowercase.<\/p>\n\n\n\n
The following shows the syntax of the title()<\/code> method:<\/p>\n\n\n
str<\/span>.title<\/span>()<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
Python title() method example #<\/a><\/h2>\n\n\n\n
The following example shows how to use the title()<\/code> method to return the titlecased version of a string:<\/p>\n\n\n
name = 'john doe'<\/span>.title()\nprint<\/span>(name)<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
John Doe<\/code><\/span><\/pre>\n\n\n
Python title() method limitation #<\/a><\/h2>\n\n\n\n
The title()<\/code> method defines a word as a group of consecutive letters.<\/p>\n\n\n\n
This rule works in many contexts. However, it won’t work as you may expect if a string contains the apostrophes (‘) like contractions and possessives. For example:<\/p>\n\n\n
s = \"They're john's relatives.\"<\/span>.title()\nprint<\/span>(s)<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
They'Re John'<\/span>S Relatives.<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
In this example, the string contains apostrophes ('<\/code>) that act as word boundaries. The title()<\/code> method treats They're<\/code> as two separate words.<\/p>\n\n\n\n
import<\/span> re\ndef titlecase(s):\n    return<\/span> re.sub(\n        r\"[A-Za-z]+('[A-Za-z]+)?\"<\/span>,\n        lambda word: word.group(0<\/span>).capitalize(),\n        s)<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
And use the titlecase()<\/code> function:<\/p>\n\n\n
s = \"They're john's relatives.\"<\/span>\ns = titlecase(s)\nprint<\/span>(s)<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
They're John'<\/span>s Relatives.<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
Now, it works as expected.<\/p>\n\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
  • Use the Python string title()<\/code> method to returns the titlecased version of a string.<\/li><\/ul>\n
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    Was this tutorial helpful ?<\/div>\n\t\t
    \n\t\t\t\n\t\t\t\t\n\t\t\t\t\t<\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t\n\t\t\t\t\n\t\t\t\t\t<\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t
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To fix it, you need to define a function<\/a> that uses a regular expression:<\/p>\n\n\n