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)!#%&? etc.

I'm looking for a very quick way to generate an alphanumeric unique id for a primary key in a table. Would something like this work? def genKey(): hash = hashlib.md5(RANDOM_NUMBER).digest().e...

Apr 21, 2025 · The isalnum() method is a string function in Python that checks if all characters in the given string are alphanumeric. If every character is either a letter or a number, isalnum() returns True . Otherwise, it returns False .

Jan 16, 2025 · Learn how to check if a string contains only alphanumeric characters and underscores in Python using regex and isidentifier(). Step-by-step tutorial with examples

Feb 15, 2024 · The str.isalnum() method in Python is used to determine if all the characters in a string are alphanumeric. A string is deemed alphanumeric if it consists of letters and numbers only, without any spaces or special characters.

Feb 11, 2025 · In this tutorial, we will walk through these three Python methods and learn how to use them. So let's get started. isalpha() method stands for "is alphabets?", this method returns a boolean value True if all the characters inside the string value are alphabets.

The isalnum() method returns True if all characters in the string are alphanumeric (either alphabets or numbers). If not, it returns False. In this tutorial, you will learn about the Python String isalnum() method with the help of examples.

Dec 30, 2019 · Python String isalnum() function checks for the alphanumeric characters in a string and returns True only if the string consists of alphanumeric characters i.e. either alphabet (a-z, A-Z) or numbers (0-9) or combination of both.

Mar 28, 2024 · The isalnum() method in Python provides a convenient way to check whether a string contains only alphanumeric characters. By returning True if the string consists solely of letters or numbers, and False otherwise, this method proves useful in various applications, from input validation to data processing.

Jan 25, 2024 · Check out this nifty example for using the isalnum () function to see if a string is alphanumeric: See? With just one line of code, we’re checking if our string contains only alphanumeric characters!