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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 database_caller_creator(self, name=None):
        '''creates a sqlite3 db
        returns the related connection object
        which will be later used to spawn the cursor
        '''

        try:
            if name:
                database = name + '.db'
            else:
                database = 'sqlite_' + str_generator(self) + '.db'

            conn = sqlite3.connect(database)
            logger.warning('Database created and opened succesfully: %s' % database, extra=d)
        except Exception:
            logger.error('Failed to connect or create database / sqlite3', extra=d)
            raise DbConnException

        return conn