Как правильно взаимодействовать с БД при многопоточности?

import _mysql


class MySql:

    def __init__(self):
        self.db = _mysql.connect(host="localhost", user="root", passwd="", db="cloner")

    def query(self, sql):
        self.db.query(sql)
        return self.db.store_result()

    def getItem(self):
        getProjectQuery = self.query("SELECT * FROM projects WHERE status=0 LIMIT 1")
        row = getProjectQuery.fetch_row(how=1)
        return row

    def setItemProcess(self, id):
        projectStatusProcess = self.query("UPDATE projects SET status=1 WHERE id=" + id)
        return projectStatusProcess

    def setItemDone(self, path, id):
        projectStatusDone = self.query("UPDATE projects SET status=2, project_path='" + path + "' WHERE id=" + id)
        return projectStatusDone

if __name__ == "__main__":

    mysql = database.MySql()
    while True:
        row = mysql.getItem()

        if len(row) > 0:
            row = row[0]
            projectStatusUpdateQuery = mysql.setItemProcess(row['id'])
            project_url = row["project_url"].decode('utf8')
            project_name = row["project_name"].decode('utf8')
            user_id = row["user_id"]
            project_id = row["id"]
            crawl = crawler.Crawler(
                url=project_url,
                project_name=project_name,
                user_id=user_id,
                project_id=project_id)

            crawl.start()
        else:
            continue

_mysql_exceptions.OperationalError: (2013, 'Lost connection to MySQL server during query')