Python RegEx | Python3 regex
ARegEx,orRegularExpression,isasequenceofcharactersthatformsasearchpattern.RegExcanbeusedtocheckifastringcontainsthespecifiedsearchpattern.RegExModulePythonhasabuilt-inpackagecalledre,whichcanbeusedtoworkwithRegularExpressions.Importtheremodule:RegExinPythonWhenyouhaveimportedtheremodule,youcanstartusingregularexpressions:ExampleSearchthestringtoseeifitstartswith"The"andendswith"Spain":importretxt="TheraininSpain"x=re.search("The.*Spain$",txt)TryitYourself»[1]RegExFunctionsTheremoduleoffersas...
A RegEx, or Regular Expression, is a sequence of characters that forms a search pattern.
RegEx can be used to check if a string contains the specified search pattern.
RegEx ModulePython has a built-in package called re, which can be used to work with Regular Expressions.
Import the re module:
RegEx in PythonWhen you have imported the re module, you can start using regular expressions:
ExampleSearch the string to see if it starts with "The" and ends with "Spain":
import retxt = "The rain in Spain"x = re.search("The.*Spain$", txt)
Try it Yourself »[1] RegEx FunctionsThe re module offers a set of functions that allows us to search a string for a match:
Function Description findall[2] Returns a list containing all matches search[3] Returns a Match object[4] if there is a match anywhere in the string split[5] Returns a list where the string has been split at ea...