<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def connect(self, config):
 """Connect to database with given configuration, which may be a dict or a path to a pymatgen-db configuration. """

        if isinstance(config, str):
            conn = dbutil.get_database(config_file=config)
        elif isinstance(config, dict):
            conn = dbutil.get_database(settings=config)
        else:
            raise ValueError("Configuration, '{}',  must be a path to "
                             "a configuration file or dict".format(config))
        return conn