1、在项目中__init__.py中这个报错原因，python 3.5以上版本不支持这种方式
from pymysql import install_as_MySQLdb
install_as_MySQLdb()
解决：
import pymysql
pymysql.version_info=(1,4,3,"final",0) # 指定了pymysql的版本：1.4.3,按照你版本修改
pymysql.install_as_MySQLdb()
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