Question

我对Python有点陌生，无法终生了解为什么下面的代码没有提取我要获取的元素。

当前返回：

for player in all_players:

    player_first, player_last = player.split()
    player_first = player_first.lower()
    player_last = player_last.lower()
    first_name_letters = player_first[:2]
    last_name_letters = player_last[:5]

    player_url_code = '/{}/{}{}01'.format(last_name_letters[0], last_name_letters, first_name_letters)
    player_url = 'https://www.basketball-reference.com/players' + player_url_code + '.html'
    print(player_url) #test
    req = urlopen(player_url)
    soup = bs.BeautifulSoup(req, 'lxml')
    wrapper = soup.find('div', id='all_advanced_pbp')
    table = wrapper.find('div', class_='table_outer_container')


    for td in table.find_all('td'):
        player_pbp_data.append(td.get_text())

当前返回：

--> for td in table.find_all('td'):
        player_pbp_data.append(td.get_text()) #if this works, would like to 

AttributeError: 'NoneType' object has no attribute 'find_all'

注意：遍历包装对象的子对象将返回：

< div class="table_outer_container" >作为树的一部分。

谢谢！

Answer 1

尝试显式传递html：

bs.BeautifulSoup(the_html, 'html.parser')

Answer 2

确保table包含您期望的数据。

例如https://www.basketball-reference.com/players/a/abdulka01.html似乎不包含带有div的{{1}}

Answer 3

我试图从您提供的URL中提取数据，但没有获得完整的DOM。之后，我尝试使用带有javascrip且没有javascrip的浏览器访问页面，我知道网站需要javascrip来加载一些数据。但是不需要players之类的页面。获取动态数据的简单方法是使用硒

这是我的测试代码

import requests
from bs4 import BeautifulSoup
from selenium import webdriver

player_pbp_data = []

def get_list(t="a"):
    with requests.Session() as se:
        url = "https://www.basketball-reference.com/players/{}/".format(t)
        req = se.get(url)
        soup = BeautifulSoup(req.text,"lxml")
        with open("a.html","wb") as f:
            f.write(req.text.encode())
        table = soup.find("div",class_="table_wrapper setup_long long")
        players = {player.a.text:"https://www.basketball-reference.com"+player.a["href"] for player in table.find_all("th",class_="left ")}


def get_each_player(player_url="https://www.basketball-reference.com/players/a/abdulta01.html"):

    with webdriver.Chrome() as ph:
        ph.get(player_url)
        text = ph.page_source

    '''
    with requests.Session() as se:
        text = se.get(player_url).text
    '''

    soup = BeautifulSoup(text, 'lxml')
    try:
        wrapper = soup.find('div', id='all_advanced_pbp')
        table = wrapper.find('div', class_='table_outer_container')
        for td in table.find_all('td'):
            player_pbp_data.append(td.get_text())
    except Exception as e:
        print("This page dose not contain pbp")



get_each_player()

BS4在Python中找不到元素

3 个答案: