如何用python写接口

from flask import Flask, jsonify
from flask_cors import CORS
import requests
import json
import pymysql
from flask import request
from urllib.parse import urlparse
from urllib import parse

app = Flask(__name__)
CORS(app)

list=[]

# def page(page,size):
#     for i in range(page) :
#         headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36'}
#         rep=requests.get('https://club.jd.com/comment/productPageComments.action?callback=fn&productId=100014352499&score=0&sortType=5&page='+str(i)+'&pageSize='+str(size)+'&isShadowSku=0&fold=1',headers=headers)
#         r=rep.text.replace('fn(','').replace(');','')
#         # print(str(r))
#         data = json.loads(r)
#         a = data['comments']
#         if a:list.extend(a)  
        
# page(1,10)


@app.route('/hello')
def hello():
    return jsonify(data)

@app.route('/login',methods=['POST'])
def login():
    postdata = request.get_json()
    print(postdata)
    username=postdata.get('username')
    password=postdata.get('password')
    if len(username)==0 |  len(password)==0:
        return {'data':None,'message':'请输入账号密码','code':0} 
    else:
        sql = "select * from user where username='%s' and password='%s'"%(username,password)
        print(sql)
        data = getDB(sql)
        if len(data)==1:
            return {'data':None,'message':'登录成功','code':200}
        else:
            return {'data':None,'message':'账号或密码错误','code':0}
    
def getDB(sql):
    db = pymysql.connect(host='localhost',port=3306,user='root',password='123456',database='app',charset='utf8')
    cursor = db.cursor(cursor=pymysql.cursors.DictCursor)
    cursor.execute(sql)
    data=cursor.fetchall()
    cursor.close()
    db.close()
    return data

@app.route('/robot',methods=['POST'])
def robot():
        data = request.get_json()
        content = data.get('content')
        print(content)
        rep = requests.get('http://api.qingyunke.com/api.php?key=free&appid=0&msg='+content)
        data = json.loads(rep.text)
        return {'data':data['content'],'message':'成功','code':200}

# @app.route('/robot',methods=['GET'])
# def robot():
#         url = urlparse(request.url)
#         content = parse.parse_qs(url.query).get('content')[0]
#         print(content)
#         rep = requests.get('http://api.qingyunke.com/api.php?key=free&appid=0&msg='+content)
#         data = json.loads(rep.text)
#         return {'data':data['content'],'message':'成功','code':200}

if __name__ == '__main__':
    app.run('localhost',8000)