Regular Expressions | Grouping

Regex: Grouping::

Suppose we have textual data with dates in it and we want to extract only the year from the dates. This can be done using regular expression pattern with grouping to match dates and then we can extract the component elements such as the day, month or the year from the date.

Example:

url = "http://www.telegraph.co.uk/formula-1/2017/10/28/mexican-grand-prix-2017-time-does-start-tv-channel-odds-lewisl/2017/05/12"

date_regex = '/(\d{4})/(\d{1,2})/(\d{1,2})/'

print(re.findall(date_regex, url))