python-regex

Python - Regex Lookbehind

Last Updated: 24 February 2021

Regex Lookbehind is used as an assertion in Python regular expressions(re) to determine success or failure whether the pattern is behind i.e ...read more

Python - Regex Lookahead

Last Updated: 03 January 2021

Lookahead is used as an assertion in Python regular expressions to determine success or failure whether the pattern is ahead i.e to the righ ...read more

Python program to extract Strings between HTML Tags

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Last Updated: 17 May 2023

Given a String and HTML tag, extract all the strings between the specified tag.Input : 'bGfg/b is bBest/b. I love bReading CS/b from it.' , ...read more

Python Programs

Python - Check if String Contain Only Defined Characters using Regex

Last Updated: 05 January 2024

In this article, we are going to see how to check whether the given string contains only a certain set of characters in Python. These define ...read more

Parsing and Processing URL using Python - Regex

Last Updated: 02 September 2020

Prerequisite: Regular Expression in PythonURL or Uniform Resource Locator consists of many information parts, such as the domain name, path, ...read more

re.MatchObject.span() Method in Python - regex

Last Updated: 02 September 2020

re.MatchObject.span() method returns a tuple containing starting and ending index of the matched string. If group did not contribute to the ...read more

re.MatchObject.groupdict() function in Python - Regex

Last Updated: 29 August 2020

This method returns a dictionary with the groupname as keys and the matched string as the value for that key.Syntax: re.MatchObject.groupdic ...read more

re.MatchObject.group() function in Python Regex

Last Updated: 27 May 2021

re.MatchObject.group() method returns the complete matched subgroup by default or a tuple of matched subgroups depending on the number of ar ...read more

Python - Substituting patterns in text using regex

Last Updated: 29 December 2020

Regular Expression (regex) is meant for pulling out the required information from any text which is based on patterns. They are also widely ...read more

Python - Check whether a string starts and ends with the same character or not (using Regular Expression)

Last Updated: 31 July 2023

Given a string. The task is to write a regular expression to check whether a string starts and ends with the same character.Examples:Input : ...read more

Python Programs

Remove duplicate words from Sentence using Regular Expression

Last Updated: 09 April 2024

Given a string str which represents a sentence, the task is to remove the duplicate words from sentences using regular Expression in Program ...read more

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Verbose in Python Regex

Last Updated: 19 July 2019

In this article, we will learn about VERBOSE flag of the re package and how to use it.re.VERBOSE : This flag allows you to write regular exp ...read more

Python regex to find sequences of one upper case letter followed by lower case letters

Last Updated: 31 July 2023

Write a Python Program to find sequences of one upper case letter followed by lower case letters. If found, print 'Yes', otherwise 'No'. Exa ...read more

Python Programs