{"id":1964,"date":"2020-12-28T03:50:23","date_gmt":"2020-12-28T03:50:23","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=1964"},"modified":"2020-12-28T03:50:29","modified_gmt":"2020-12-28T03:50:29","slug":"python-string-swapcase","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-string-methods\/python-string-swapcase\/","title":{"rendered":"Python String swapcase()"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn about the Python string swapcase()<\/code> method to return a copy of a string with all lowercase characters converted to uppercase and vice versa.<\/p>\n\n\n\n

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

The string swapcase()<\/code> method returns a copy of a string<\/a> with all lowercase<\/a> characters converted to uppercase<\/a> and vice versa.<\/p>\n\n\n\n

The following shows the syntax of the swapcase()<\/code> method:<\/p>\n\n\n

str<\/span>.swapcase<\/span>()<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
If you use English characters, the str.swapcase().swapcase()<\/code> will be the same as str<\/code>.<\/p>\n\n\n\n
However, it’s not always true for non-English characters. In other words, the following expression will not always be True<\/code>:<\/p>\n\n\n
str.swapcase().swapcase() == str<\/code><\/span><\/pre>\n\n\n
Python String swapcase() method examples #<\/a><\/h2>\n\n\n\n
The following example uses the string swapcase()<\/code> method to return a copy of string with the letter case reversed:<\/p>\n\n\n
message = 'Hello'<\/span>\nnew_message = message.swapcase()\n\nprint<\/span>(new_message)<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
hELLO<\/code><\/span><\/pre>\n\n\n
The following example illustrate how to use the string swapcase() method with the non-English characters.<\/p>\n\n\n
color = 'wei\u00df'<\/span>\nprint<\/span>(color)\n\nnew_color = color.swapcase()\nprint<\/span>(new_color)\n\nprint<\/span>(color.swapcase().swapcase())\nprint<\/span>(color.swapcase().swapcase() == color)  # False<\/span><\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
wei\u00df\nWEISS\nweiss\nFalse<\/span><\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
The word 'wei\u00df'<\/code> is a German word. It means white<\/code> in English. And the letter '\u00df'<\/code> is equivalent to 'ss'<\/code>.<\/p>\n\n\n\n
The expression color.swapcase()<\/code> returns 'WEISS'<\/code>. So the expression color.swapcase().swapcase()<\/code> returns 'weiss'<\/code>.<\/p>\n\n\n\n
Therefore, expression color.swapcase().swapcase() == color<\/code> returns False<\/code>.<\/p>\n\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
  • Use the Python string swapcase()<\/code> method to return a copy of a string with all lowercase characters converted to uppercase and vice versa.<\/li><\/ul>\n
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