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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 create_db_instance(self, params):
        ''' Create db instance '''
        if not self.connect_to_aws_rds():
            return False
        try:
            database = self.rdsc.create_dbinstance(
                id=params['id'],
                allocated_storage=params['size'],
                instance_class='db.t1.micro',
                engine='MySQL',
                master_username=params['username'],
                master_password=params['password'],
                db_name=params['dbname'],
                multi_az=False
            )
        except:
            return False
        else:
            return True