{"id":148,"date":"2020-10-03T15:24:02","date_gmt":"2020-10-03T15:24:02","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=148"},"modified":"2025-03-26T06:32:49","modified_gmt":"2025-03-26T06:32:49","slug":"python-constants","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-basics\/python-constants\/","title":{"rendered":"Python Constants"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to define Python constants.<\/p>\n\n\n\n

Sometimes, you may want to store values in variables<\/a>. But you don’t want to change these values throughout the execution of the program. <\/p>\n\n\n\n

To do it in other programming languages, you can use constants. The constants are like variables but their values don’t change during the program execution.<\/p>\n\n\n\n

The bad news is that Python doesn’t support constants.<\/p>\n\n\n\n

To work around this, you use all capital letters to name a variable to indicate that the variable should be treated as a constant. For example:<\/p>\n\n\n

FILE_SIZE_LIMIT = 2000<\/span>\nprint(FILE_SIZE_LIMIT)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
When encountering variables like these, you should not change their values. These variables are constant by convention<\/strong>, not by rules.<\/p>\n\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n