pip install flask --upgrade 强制更新至最新版本
from flask import Flask
app = Flask(__name__)
@app.route('/', methods=['GET'])
def index():
return 'hello world'
if __name__ == '__main__':
app.run()
__name__：就是字符串，约定俗成用这个
app.run()：运行
标签：__,初体验,run,name,Flask,app From： https://www.cnblogs.com/10086upup/p/17599083.html