<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def generate_uuid4(self) -> list: """Generate a list of parts of a UUID version 4 string. Usually, these parts are concatenated together using dashes. """

        # uuid4: 8-4-4-4-12: xxxxxxxx-xxxx-4xxx-{8,9,a,b}xxx-xxxxxxxxxxxx
        # instead of requesting small amounts of bytes, it's better to do it
        # for the full amount of them.
        hexstr = randhex(30)

        uuid4 = [
            hexstr[:8],
            hexstr[8:12],
            '4' + hexstr[12:15],
            '{:x}{}'.format(randbetween(8, 11), hexstr[15:18]),
            hexstr[18:]
        ]
        self.last_result = uuid4
        return uuid4