Remove all special characters, punctuation and spaces from string

Here is an example of code that removes all special characters, punctuation, and spaces from a string in Python:

import re

def remove_special_characters(string):
    return re.sub(r"[^a-zA-Z0-9]+", "", string)

example_string = "Hello, World! How are you today?"
cleaned_string = remove_special_characters(example_string)

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The above code will output:


The function remove_special_characters uses the re.sub() method, which performs a search-and-replace on the input string. The regular expression [^a-zA-Z0-9]+ matches one or more characters that are not letters or numbers, and replaces them with an empty string. The ^ symbol in the regular expression means that everything that doesn't match the pattern inside the square brackets will be returned, which is the desired outcome in this case.