python循环请求。get（）只返回第一个循环

试图从多个网页中刮取一个表并存储在列表中。列表将第一个网页的结果打印3次

import pandas as pd
import requests
from bs4 import BeautifulSoup

dflist = []
for i in range(1,4):
    s = requests.Session()
    res = requests.get(r'http://www.ironman.com/triathlon/events/americas/ironman/world-championship/results.aspx?p=' + str(i) + 'race=worldchampionship&rd=20181013&agegroup=Pro&sex=M&y=2018&ps=20#axzz5VRWzxmt3')
    soup = BeautifulSoup(res.content,'lxml')
    table = soup.find_all('table')
    dfs = pd.read_html(str(table))
    dflist.append(dfs)
    s.close()

print(dflist)  

---

你在

'？p='+str（i）

之后漏掉了

&

，因此你的请求都将

p

设置为

${NUMBER}race=worldconsumportion

，ironman.com可能无法理解，只是忽略了这一点。在

'race=worldcountship'

开头插入

&

为了防止将来出现此类错误，您可以将URL的查询参数作为

dict

传递给

params

关键字参数，如下所示：

    params = {
        "p": i,
        "race": "worldchampionship",
        "rd": "20181013", 
        "agegroup": "Pro",
        "sex": "M",
        "y": "2018",
        "ps": "20",
    }

    res = requests.get(r'http://www.ironman.com/triathlon/events/americas/ironman/world-championship/results.aspx#axzz5VRWzxmt3', params=params)