python regex pattern variable

Regular expressions (regex) are a powerful tool for pattern matching in strings. In Python, the re module provides support for regular expressions. In this tutorial, we'll explore the concept of regex pattern variables, allowing us to store and reuse patterns easily.
Regular expressions are sequences of characters that define a search pattern. They are widely used for string manipulation, searching, and data validation.
In this example, the pattern '\d{3}-\d{2}-\d{4}' represents a typical Social Security Number (SSN) format.
Once we have a regex pattern variable, we can use it for various operations, such as searching, matching, and substitution.
The match() method checks if the pattern matches at the beginning of a string.
The search() method scans the entire string for a match.
We can use the sub() method to replace matched patterns.
Regex pattern variables in Python provide a convenient way to store and reuse regular expressions. They enhance code readability and make it easier to manage complex patterns. Experiment with different patterns and explore the versatility of the re module for efficient string manipulation in your Python projects.
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