Kumpulan dan Tangkapan Bernama

import re
m = re.search(r'(\d{4})-(\d{2})-(\d{2})', '2024-01-15')
if m: print(m.group(1), m.group(2), m.group(3))

import re
m = re.search(r'(\w+)@(\w+)\.(\w+)', 'user@example.com')
if m: print(m.groups())

import re
m = re.search(
    r'(?P<year>\d{4})-(?P<month>\d{2})-(?P<day>\d{2})',
    '2024-01-15'
)
if m: print(m.groupdict())

import re
print(re.findall(r'(?:cat|dog)s?', 'cats dogs cat dog'))

import re
# Match repeated words
m = re.search(r'\b(\w+)\s+\1\b', 'the the quick brown', re.IGNORECASE)
if m: print('repeated:', m.group())

import re
result = re.findall(r'(\w+)=(\w+)', 'x=1 y=2 z=3')
print(result)

import re
result = re.sub(r'(\w+)\s(\w+)', r'\2 \1', 'John Smith')
print(result)

import re
# Prices followed by USD
print(re.findall(r'\d+(?= USD)', '100 USD 200 EUR 300 USD'))

import re
print(re.findall(r'(?<=\$)\d+', 'paid $100 and $200'))

import re
m = re.search(r'<(?P<tag>\w+)>.*?</(?P=tag)>', '<b>hello</b>')
if m: print(m.group())