解决：
1. 安装依赖
pip install pymysql pip install mysqlclient
2.配置
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://USERNAME:PASSWORD@localhost:port/YOURDBNAME'
解决：
1. 安装依赖
pip install pymysql pip install mysqlclient
2.配置
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://USERNAME:PASSWORD@localhost:port/YOURDBNAME'
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