原版doc地址

一个最小的应用

from flask import Flask
app = Flask(name)

@app.route('/')
def hello_world():
return 'Hello, World!'

linux简单运行

$ export FLASK_APP=hello.py
$ flask run
or:
$ export FLASK_APP=hello.py
$ python -m flask run

power shell

PS C:\path\to\app> $env:FLASK_APP = "hello.py"

cmd

C:\path\to\app>set FLASK_APP=hello.py

外网访问

flask run --host=0.0.0.0