flask install

from flask import Flask

# 初始化
app = Flask(__name__)


# 路由视图
@app.route('/')
def index():
    return '<h1>hello world </h1>'


@app.route('/user/<name>')
def user(name):
    return '<h1>hello {0}</h1>'.format(name)

# 启动服务器
if __name__ == '__main__':
    app.run(debug=True)