【新手上路】-【flask项目】解决return binds[self._bind] 报TypeError: string indices must be integers错误
执行python manage.py shell时，老是报self._bind 的类型传错问题：见下图 查看flask_sqlalchemy第3方类之后，最后查到config.py中config中多配置SQLALCHEMY_BINDS值，把它配跟SQLALCHEMY_DATABASE_URI一样，导致上面执行shell命令时报错； 最后在configwe文件中删除SQLALCHEMY_BIND
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