加载常量-从文件中加载

配置文件：

 代码：

from flask import Flask





app=Flask(__name__)
app.config.from_pyfile('setting.py')



@app.route('/')
def index():
    print(app.config['USER'])
    print(app.config['PWD'])
    return "Hello World!"


if __name__ == '__main__':
    app.run()