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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def _parse_vagrant_sandbox_status(self, vagrant_output):
        '''
        Returns the status of the sandbox mode given output from
        'vagrant sandbox status'.
        '''
        # typical output
        # [default] - snapshot mode is off
        # or
        # [default] - machine not created
        # if the box VM is down
        tokens = [token.strip() for token in vagrant_output.split(' ')]
        if tokens[0] == 'Usage:':
            sahara_status = 'not installed'
        elif "{} {}".format(tokens[-2], tokens[-1]) == 'not created':
            sahara_status = 'unknown'
        else:
            sahara_status = tokens[-1]
        return sahara_status