def get_string_between(start, stop, s):
    i1 = s.find(start)
    if i1 == -1:
        return False
    s = s[i1 + len(start):]
    i2 = s.find(stop)
    if i2 == -1:
        return False
    s = s[:i2]
    return s
Get the parent's key.
dataset/ETHPy150Open richrd/suplemon/suplemon/helpers.py/get_string_between--crossover with--dataset/ETHPy150Open CollabQ/CollabQ/.google_appengine/google/appengine/ext/db/__init__.py/Model.parent_key