Prerequisite: Regular expression in Python
Given 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 expressionsimport re# Make a regular expression to accept string# ending with alphanumeric characterregex = '[a-zA-z0-9]$' # Define a function for accepting string# ending with alphanumeric characterdef 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 = "neveropen" check(string) |
Output :
Discard Accept Discard Accept
