Python re compile














































Python re compile



The re library is a Python library that is frequently used to cut down on redundant lines of code that are used to match a substring with the specified pattern in the whole string.

To make use of the features of regex matching , one of the first things to be done is to create a regex object with the required pattern , which can be done using the .compile() static method*.

*static methods : methods that are used on the class and not objects belonging to the class.

Let us consider an example now.


CODE:

import re regex_object = re.compile(r'\d\d\d-\d\d\d-\d\d\d\d') # \d represents a digit(0-9) s = "He is the president and his number is 415-555-4242 , so leave a message." # example string search_answer = regex_object.search(s) # contains result of the search
print("The number detected in the example string is "+search_answer.group()+".")




OUTPUT:

The number detected in the example string is 415-555-4242.


After having created the regex object we need to look for a pattern matching the regex object's description. The number in the example string s is "415-555-4242".Which accurately matches the description of the regex object compiled in the regex_object variable.


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