Using Character Constants in Python's `string` Module

Python's string module provides various character constants to make string operations more convenient. The main constants are as follows:

• string.ascii_lowercase: Lowercase alphabet (abcdefghijklmnopqrstuvwxyz)
• string.ascii_uppercase: Uppercase alphabet (ABCDEFGHIJKLMNOPQRSTUVWXYZ)
• string.ascii_letters: Both lowercase and uppercase alphabet (abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ)
• string.digits: Digits (0123456789)
• string.punctuation: Punctuation characters (!"#$%&'()*+,-./:;<=>?@[\]^_{|}~')
• string.whitespace: Whitespace characters ( \t\n\r\x0b\x0c)
• string.printable: All printable characters (digits + ascii_letters + punctuation + whitespace)

These constants are commonly used for text filtering, regular expressions, data validation, and generating random characters, making the code more concise and readable.