HongleiXie

import re

email = 'Email: 87hello9__3w4-o.rld@comp.nus.edu.sg where hello_world=wenzy'
out = re.search(r"([a-zA-Z0-9_\.+-]+)@([a-zA-Z0-9-]+)\.([a-zA-Z0-9-\.]+)", email)
# find patterns: all chars including _ . -

print(out.group(0))
print(out.group(1))
print(out.group(2))
print(out.group(3))