Python Regex Named Groups

In Python regex, match.groupdict() is a method that returns a dictionary containing all the named groups of a regular expression match.

When you use named capturing groups in a regular expression using the (?P<name>...) syntax, you can access the captured text using the groupdict() method on the match object returned by re.match() or re.search(). The keys of the dictionary correspond to the group names, and the values are the captured text for each group.

Here's an example:

import re

pattern = r'(?P<year>\d{4})-(?P<month>\d{2})-(?P<day>\d{2})'
text = 'Today is 2023-04-19'

match = re.search(pattern, text)

if match:
    print(match.groupdict())

Output:

{'year': '2023', 'month': '04', 'day': '19'}

In the above example, the regular expression pattern matches a date string in the format 'yyyy-mm-dd', and each part of the date is captured using named groups. The groupdict() method returns a dictionary with keys 'year', 'month', and 'day', and their corresponding captured values.