Regular Expression In Python Part 1

Regular Expression can be think of as a god send weapon to find patterns in a string. Although regular expression are present in all the prominent programming languages and even word processors this article will be about the application of regular expression in python.

Lets say we want to find the a phone number inside a string. The phone number look like this 415–555–4242.

Lets create a method without regular expression for finding a phone number in a string.

Input

Although the above code works, It took a 17 lines and lot of ifstatement just to check a simple pattern.If we want to find something complex the code can become a lot messier.

Regular Expression simplify pattern searching to the point it seems like magic.

Heres how will we create the above program using regular expression.

This article just contains the light introduction to Regular Expression. There are lot of important topics likes groups, which i will address in next series of this article which i will release shortly.

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