{"id":3156,"date":"2021-11-29T16:33:48","date_gmt":"2021-11-29T16:33:48","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=3156"},"modified":"2021-12-03T07:59:30","modified_gmt":"2021-12-03T07:59:30","slug":"python-regex-quantifiers","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-regex\/python-regex-quantifiers\/","title":{"rendered":"Python Regex Quantifiers"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to use Python regex quantifiers to define how many times a character or a character set can be repeated.<\/p>\n\n\n\n

Introduction to Python regex quantifiers #<\/a><\/h2>\n\n\n\n

In regular expressions<\/a>, quantifiers match the preceding characters or character sets a number of times. The following table shows all the quantifiers and their meanings:<\/p>\n\n\n\n

Quantifier<\/th>Name<\/th>Meaning<\/th><\/tr><\/thead>
*<\/code><\/td>Asterisk<\/td>Match its preceding element zero or more times.<\/td><\/tr>
+<\/code><\/td>Plus<\/td>Match its preceding element one or more times.<\/td><\/tr>
?<\/code><\/td>Question Mark<\/td>Match its preceding element zero or one time.<\/td><\/tr>
{<\/code> n<\/em> }<\/code><\/td>Curly Braces<\/td>Match its preceding element exactly n<\/code> times.<\/td><\/tr>
{<\/code> n<\/em> ,}<\/code><\/td>Curly Braces <\/td>Match its preceding element at least n<\/code> times.<\/td><\/tr>
{<\/code> n<\/em> ,<\/code> m<\/em> }<\/code><\/td>Curly Braces <\/td>Match its preceding element from n<\/code> to m<\/code> times.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Match zero or more times (*) #<\/a><\/h3>\n\n\n\n

The quantifier (*<\/code>) matches its preceding element zero or more times. For example, the following program uses the *<\/code> quantifier to match any string that ends with Python<\/code>:<\/p>\n\n\n

import<\/span> re\n\ns = \"\"\"CPython, IronPython, and JPython \n       are major Python's implementation\"\"\"<\/span>\n\nmatches = re.finditer('\\w*Python'<\/span>, s)\n\nfor<\/span> match in<\/span> matches:\n    print(match)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
In this example:<\/p>\n\n\n\n