代码实现人民币和美元的汇率

@TOC

代码实现人民币和美元的相互换算

import requests
from lxml import etree
from time import sleep

class trans_rate:
    def __init__(self):
        self.headers = {
    
    
            'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36',
            'referer': 'https://pos.baidu.com/'
            }
    def parse(self,parse_url):
        response = requests.get(parse_url,headers=self.headers)
        result = etree.HTML(response.text).xpath('//td/p/text()')[-1]
        # print(result)
        return result
    def quit(self):
        if input("输入1重新换算，或者点击回车键用以退出").strip()== '1':

            print('\n'*2)
            return self.run()
        else:
            pass
    def get_url(self):
        input1 = input("输入你要选择的兑换的汇率对象(默认为人民币换算成美元)：" + "\n" + "\t" + " 输入1选择美元换算至人民币，\n\t 其余任意值为人民币换算至美元!\n")
        money = input("输入需要换算的金额：").strip()
        if input1 == '1':
            url = "https://qq.ip138.com/hl.asp?from=USD&to=CNY&q={}".format(money)
            print("当前为美元换算成人民币：")
        else:
            url = "https://qq.ip138.com/hl.asp?from=CNY&to=USD&q={}".format(money)
            print("当前为人民币换算成美元：")
        return url
    def current_rate(self):
        res1 = requests.get("https://qq.ip138.com/hl.asp?from=USD&to=CNY&q=1", headers=self.headers).text
        a = etree.HTML(res1).xpath("//td[2]/p/text()")[1]
        print("当前美元对人民币的汇率为：1美元 = " + a + "元人民币")
    def run(self):
        self.current_rate()
        url =self.get_url()
        res = self.parse(url)
        print(res)
        # sleep(2)
        print('\n')
        self.quit()

if __name__ == '__main__':
    tr = trans_rate()
    tr.run()