get text between two strings python

>>> import re
>>> s = 'Part 1. Part 2. Part 3 then more text'
>>> re.search(r'Part 1\.(.*?)Part 3', s).group(1)
' Part 2. '
>>> re.search(r'Part 1(.*?)Part 3', s).group(1)
'. Part 2. '

# You can do this with Reg Exp
import re

s = 'asdf=5;iwantthis123jasd'
result = re.search('asdf=5;(.*)123jasd', s)
print(result.group(1))

import re as regex

s = 'asdf=5;iwantthis123jasd'
result = regex.match('asdf=5;(.*)123jasd', s)

print(result)