To check if a string contains only alphanumeric characters, you can use the isalnum() method. If the string consists solely of letters and numbers, this method will return true. Otherwise, it will return false.
An alternative method for checking if a string contains only alphanumeric characters is to use the match() method from the re (regular expression) module. This method allows you to search for patterns within a string and can be used to check if the string consists only of letters and numbers. To use this method, you will need to import the re module and write a regular expression that defines the pattern you want to search for in the string.
For Example: