As a python developers, we have to accomplished a lot of jobs such as data cleansing from a file before processing the other business operations.
For an example, you have a raw data text file and you have to read some specific data like email addresses by to performing the actual Regular Expression matching.
What is a Regular Expression and which module is used in Python?
Regular expression is a sequence of special character(s) mainly used to find and replace patterns in a string or file, using a specialized syntax held in a pattern.
The Python module re provides full support for Perl-like regular expressions in Python. The re module raises the exception re.error if an error occurs while compiling or using a regular expression.
Example -
# Python program to extract emails from the String By
Regular Expression.
# Importing module required for regular
# expressions
import re
# Example string
txt =
"Ryan has sent an invoice email to
john.d@yahoo.com by using his email id ryan.arjun@gmail.com and he also shared a
copy to his boss rosy.gray@amazon.co.uk on the cc part."
# \w matches any non-whitespace character
# @ for as in the Email
# + for Repeats a character one or more times
findEmail = re.findall(r'[\w\.-]+@[\w\.-]+', txt)
# Printing findEmail of List
print(findEmail)
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