Python Regex | Program to accept string ending with alphanumeric character Last Updated : 12 Jul, 2025 Comments Improve Suggest changes Like Article Like Report Prerequisite: Regular expression in PythonGiven a string, write a Python program to check whether the given string is ending with only alphanumeric character or Not.Examples: Input: ankitrai326 Output: Accept Input: ankirai@ Output: Discard In this program, we are using search() method of re module. re.search() : This method either returns None (if the pattern doesn’t match), or re.MatchObject that contains information about the matching part of the string. This method stops after the first match, so this is best suited for testing a regular expression more than extracting data. Alphanumeric characters in the POSIX/C locale consist of either 36 case-insensitive symbols (A-Z and 0-9) or 62 case-sensitive characters (A-Z, a-z and 0-9).Let’s see the Python program for this : Python3 # Python program to accept string ending # with only alphanumeric character. # import re module # re module provides support # for regular expressions import re # Make a regular expression to accept string # ending with alphanumeric character regex = '[a-zA-z0-9]$' # Define a function for accepting string # ending with alphanumeric character def check(string): # pass the regular expression # and the string in search() method if(re.search(regex, string)): print("Accept") else: print("Discard") # Driver Code if __name__ == '__main__' : # Enter the string string = "ankirai@" # calling run function check(string) string = "ankitrai326" check(string) string = "ankit." check(string) string = "geeksforgeeks" check(string) Output : Discard Accept Discard Accept Comment More infoAdvertise with us Next Article Must Do Coding Questions - Topic-wise A ankthon Follow Improve Article Tags : Python Python Programs python-regex Python Regex-programs Practice Tags : python Similar Reads Interview PreparationInterview Preparation For Software DevelopersMust Coding Questions - Company-wise Must Do Coding Questions - Topic-wiseCompany-wise Practice ProblemsCompany PreparationCompetitive ProgrammingSoftware Design-PatternsCompany-wise Interview ExperienceExperienced - Interview ExperiencesInternship - Interview ExperiencesPractice @GeeksforgeeksProblem of the DayTopic-wise PracticeDifficulty Level - SchoolDifficulty Level - BasicDifficulty Level - EasyDifficulty Level - MediumDifficulty Level - HardLeaderboard !!Explore More...Data StructuresArraysLinked ListStackQueueBinary TreeBinary Search TreeHeapHashingGraphAdvance Data StructuresMatrixStringAll Data StructuresAlgorithmsAnalysis of AlgorithmsSearching AlgorithmsSorting AlgorithmsPattern SearchingGeometric AlgorithmsMathematical AlgorithmsRandomized AlgorithmsGreedy AlgorithmsDynamic ProgrammingDivide & ConquerBacktrackingBranch & BoundAll AlgorithmsProgramming LanguagesCC++JavaPythonC#Go LangSQLPHPScalaPerlKotlinWeb TechnologiesHTMLCSSJavaScriptBootstrapTailwind CSSAngularJSReactJSjQueryNodeJSPHPWeb DesignWeb BrowserFile FormatsComputer Science SubjectsOperating SystemsDBMSComputer NetworkComputer Organization & ArchitectureTOCCompiler DesignDigital Elec. & Logic DesignSoftware EngineeringEngineering MathematicsData Science & MLComplete Data Science CourseData Science TutorialMachine Learning TutorialDeep Learning TutorialNLP TutorialMachine Learning ProjectsData Analysis TutorialTutorial LibraryPython TutorialDjango TutorialPandas TutorialKivy TutorialTkinter TutorialOpenCV TutorialSelenium TutorialGATE CSGATE CS NotesGate CornerPrevious Year GATE PapersLast Minute Notes (LMNs)Important Topic For GATE CSGATE CoursePrevious Year Paper: CS exams Like