1. 设置超时时间

import pymysql
from DBUtils.PooledDB import pooledDB

_DB_POOL_ = {}

db_dict = {
    "host": "127.0.0.1",
    "port": 3306,
    "user": "root",
    "passwd": "123456",
    "db": "utpdb",
    "maxconnections": 10,
    "charset": "utf8",
    "setsession": ['SET AUTOCOMMIT = 1'],
    "connection_timeout": 60,
    "read_timeout": 60,
    "write_timeout": 60,
}

def connect(db_name):
    if db_name not in _DB_POOL_:
        _DB_POOL_[db_name] = PooledDB(pymysql, **db_dict)
    db_pool = _DB_POOL_[db_name]
    return Conn(db_pool)