flask-script插件

　　首先在启动Flask项目时，我们可以传不同的参数作为运行参数。但是我们只能在入口app.run()传参。这样十分的不方便。Flask-Script 是一个 Flask 扩展，为 Flask 程序添加了一个命令行解析器。 Flask-Script 自带了一组常用选项，而且还支持自定义命令。

　　自定义创建命令的方法有三种：

from flask import Flask
from flask_script import Manager
from flask_script import Command

app = Flask(__name__)

manager = Manager(app)

class Hello(Command):
    'hello world'

    def run(self):
        print('hello world！')

#绑定到Hello函数
manager.add_command('hel', Hello())

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

　　执行

(flask_blog) jeff@debian:~/PycharmProjects/flask_blog$ python script_test.py hel
hello world！

　　第二种方法

from flask import Flask
from flask_script import Manager
from flask_script import Command

app = Flask(__name__)

manager = Manager(app)

#绑定到Hello函数
@manager.command
def hi():
    print('hello world！')

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

　　运行

(flask_blog) jeff@debian:~/PycharmProjects/flask_blog$ python script_test.py hi
hello world！

　　当参数多个时，使用第三种方式

from flask import Flask
from flask_script import Manager

app = Flask(__name__)

manager = Manager(app)

@manager.option('-n', '--name', dest='name', help='Your name', default='world')
def hi(name):
    'hello world or hello <setting name>'
    print('hello', name)

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

　　运行结果：

(flask_blog) jeff@debian:~/PycharmProjects/flask_blog$ python script_test.py hi
hello world
(flask_blog) jeff@debian:~/PycharmProjects/flask_blog$ python script_test.py hi -n jeff
hello jeff
(flask_blog) jeff@debian:~/PycharmProjects/flask_blog$ python script_test.py hi --name jeff
hello jeff
(flask_blog) jeff@debian:~/PycharmProjects/flask_blog$ python script_test.py hi --name jeff1
hello jeff1