Regular expressions

Source:

import re

actor main(env):
    m = re.match(r"(foo[a-z]+)", "bla bla foobar abc123")
    if m is not None:
        print("Got a match:", m.group[1])

    env.exit(0)

re.match also accepts an optional start_pos to begin scanning at a specific index (defaults to 0).

Output:

Got a match: foobar