View Discussion Show Improve Article Save Article View Discussion Improve Article Save Article Prerequisite: Regular expression
in Python Input: ankitrai326 Output: Accept Input: ankirai@ Output: Discard In this program, we are using search() method of re module. Python3
Output : Discard Accept Discard Accept When it is required to check if a string ends with an alphanumeric character or not, the regular expression is used. A method is defined that checks to see an alphanumeric characters, and returns the string as output. ExampleBelow is a demonstration of the same import re regex_expression = '[a-zA-z0-9]$' def check_string(my_string): if(re.search(regex_expression, my_string)): print("The string ends with alphanumeric character") else: print("The string doesnot end with alphanumeric character") my_string_1 = "Python@" print("The string is :") print(my_string_1) check_string(my_string_1) my_string_2 = "Python1245" print("\nThe string is :") print(my_string_2) check_string(my_string_2) OutputThe string is : Python@ The string doesn’t end with alphanumeric character The string is : Python1245 The string ends with alphanumeric character Explanation
Updated on 20-Sep-2021 10:41:24
How do you write alphanumeric in regex?For checking if a string consists only of alphanumerics using module regular expression or regex, we can call the re. match(regex, string) using the regex: "^[a-zA-Z0-9]+$".
How do I check if a string is alphanumeric regex?Considering you want to check for ASCII Alphanumeric characters, Try this: "^[a-zA-Z0-9]*$" . Use this RegEx in String. matches(Regex) , it will return true if the string is alphanumeric, else it will return false.
What is \b in Python regex?Inside a character range, \b represents the backspace character, for compatibility with Python's string literals. Matches the empty string, but only when it is not at the beginning or end of a word.
How do you take alphanumeric input in Python?Python String isalnum() Method
The isalnum() method returns True if all the characters are alphanumeric, meaning alphabet letter (a-z) and numbers (0-9). Example of characters that are not alphanumeric: (space)!
|