Question

我正在尝试创建一个脚本来从一个特定网站下载字幕。请阅读代码中的注释。这是代码：

import requests
from bs4 import BeautifulSoup

count = 0
usearch = input("Movie Name? : ")
search_url = "https://www.yifysubtitles.com/search?q="+usearch
base_url = "https://www.yifysubtitles.com"
print(search_url)
resp = requests.get(search_url)
soup = BeautifulSoup(resp.content, 'lxml')
for link in soup.find_all("div",{"class": "media-body"}):       #Get the exact class:'media-body'
    imdb = link.find('a')['href']                               #Find the link in that class, which is the exact link we want
    movie_url = base_url+imdb                                   #Merge the result with base string to navigate to the movie page
    print("Movie URL : {}".format(movie_url))                   #Print the URL just to check.. :p

    next_page = requests.get(movie_url)                         #Soup number 2 begins here, after navigating to the movie page
    soup2 = BeautifulSoup(next_page.content,'lxml')
    #print(soup2.prettify())
    for links in soup2.find_all("tr",{"class": "high-rating"}): #Navigate to subtitle options with class as high-rating
        for flags in links.find("td", {"class": "flag-cell"}):  #Look for all the flags of subtitles with high-ratings
            if flags.text == "English":                         #If flag is set to English then get the download link
                print("After if : {}".format(links))
                for dlink in links.find("td",{"class": "download-cell"}):   #Once English check is done, navigate to the download class "download-cell" where the download href exists
                    half_dlink = dlink.find('a')['href']                    #STUCK HERE!!!HERE'S THE PROBLEM!!! SOS!!! HELP!!!
                    download = base_url + half_dlink
                    print(download)

我收到以下错误：

 File "C:/Users/PycharmProjects/WhatsApp_API/SubtitleDownloader.py", line 24, in <module>
    for x in dlink.find("a"):
TypeError: 'NoneType' object is not iterable

Answer 1

只需更改以上行：

SELECT TOP 15

到此：

SELECT TOP 5

因为您在单个元素而不是列表上运行循环。

注意：唯一的区别是find_all（）返回包含单个结果的列表，而find（）只返回结果。

希望这会对你有所帮助！：）

Answer 2

查看find_all()和find()的文档。

find_all()：


find_all()方法查看标记的后代，并检索与您的过滤条件匹配的所有后代。


find：


find_all()方法扫描整个文档以查找结果，但有时您只想查找一个结果。如果你知道一个     文档只有一个<body>标签，扫描时只是浪费时间     整个文件寻找更多。而不是传入limit=1     每次拨打find_all时，都可以使用find()方法。

因此，您不需要循环find()函数来获取标记。您需要在代码中进行以下更改（删除不必要的for循环）：

...
# Previous code is the same

soup2 = BeautifulSoup(next_page.content,'lxml')
for links in soup2.find_all("tr",{"class": "high-rating"}):
    if links.find("td", {"class": "flag-cell"}).text == "English":
        print("After if : {}".format(links))
        half_dlink = links.find('td', {'class': 'download-cell'}).a['href']
        download = base_url + half_dlink
        print(download)

BeautifulSoup：为什么＆＃34; dlink_find（＆＃39; a＆＃39;）[＆＃39; href＆＃39;]＆＃34;不工作？

2 个答案: