Flask 是一个 Web 框架,使用它首先需要安装
pip3 install flask
import flask
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello_world():
return 'Hello World!'
if __name__ == '__main__':
app.run()
from flask import Flask
导入类 flask.Flask
app = Flask(__name__)
实例化创建一个 Flask 应用,第一个参数是 Flask 应用的名称
_name__ 是一个标识 Python 模块的名字的变量:
@app.route('/')
def hello_world():
return '<b>Hello World</b>'
if __name__ == '__main__':
app.run()
如果当前模块是主模块,则变量 __name__ 为 '__main__,此时调用 run() 方法启动 Flask 应用
FLASK_APP = app.py
FLASK_ENV = development
FLASK_DEBUG = 0
In folder /Users/polo/Downloads/Flask_learning
/usr/bin/python3 -m flask run
* Serving Flask app 'app.py' (lazy loading)
* Environment: development
* Debug mode: off
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
默认访问的主机地址是 127.0.0.1,默认端口是 5000,如何修改呢
if __name__ == '__main__':
app.run(host = '0.0.0.0', port = 8888)
https://www.cnblogs.com/poloyy/p/14993520.html