peewee: OperationalError: (2006, ‘MySQL server has gone away’)

OperationalError: (2006, ‘MySQL server has gone away’)

from peewee import MySQLDatabase
from playhouse.shortcuts import RetryOperationalError
class RetryMySQLDatabase(RetryOperationalError, MySQLDatabase):
    pass
db = RetryMySQLDatabase(
    host='127.0.0.1',
    database='dataname',
    user="root",
    passwd="123456",
    charset='utf8'
)

from peewee import MySQLDatabase
from playhouse.shortcuts import ReconnectMixin
# 防止断开 see: https://github.com/coleifer/peewee/issues/1992
class ReconnectMySQLDatabase(ReconnectMixin, MySQLDatabase):
    """peewee作者不推荐使用"""
    pass