soup.select('.r a') in f'https://google.com/search?q={query}' 在 Python BeautifulSoup 中带回空列表.**不是复制品** [英] soup.select('.r a') in f'https://google.com/search?q={query}' brings back empty list in Python BeautifulSoup. **NOT A DUPLICATE**

问题描述

情况:

我很幸运！"使用 Python 自动化无聊的东西"中的项目电子书不再使用他提供的代码.

The "I'm Feeling Lucky!" project in the "Automate the boring stuff with Python" ebook no longer works with the code he provided.

特别是:

linkElems = soup.select('.r a')

我做了什么:我已经尝试使用此 stackoverflow 问题

我目前也在使用相同的搜索格式.

I'm also currently using the same search format.

代码:

    import webbrowser, requests, bs4

    def im_feeling_lucky():
    
        # Make search query look like Google's
        search = '+'.join(input('Search Google: ').split(" "))
  
        # Pull html from Google
        print('Googling...') # display text while downloading the Google page
        res = requests.get(f'https://google.com/search?q={search}&oq={search}')
        res.raise_for_status()

        # Retrieve top search result link
        soup = bs4.BeautifulSoup(res.text, features='lxml')


        # Open a browser tab for each result.
        linkElems = soup.select('.r')  # Returns empty list
        numOpen = min(5, len(linkElems))
        print('Before for loop')
        for i in range(numOpen):
            webbrowser.open(f'http://google.com{linkElems[i].get("href")}')

问题:

linkElems 变量返回一个空列表 [] 并且程序在此之后不会做任何事情.

The linkElems variable returns an empty list [] and the program doesn't do anything past that.

问题:

有人可以指导我正确处理这个问题，并解释为什么它不起作用吗?

Could sombody please guide me to he correct way of handling this and perhaps explain why it isn't working?

推荐答案

我在阅读那本书时也遇到了同样的问题，并找到了该问题的解决方案.

I too had had the same problem while reading that book and found a solution for that problem.

替换

soup.select('.r a')

与

soup.select('div#main > div > div > div > a')

会解决这个问题

以下是可以工作的代码

import webbrowser, requests, bs4 , sys

print('Googling...')
res = requests.get('https://google.com/search?q=' + ' '.join(sys.argv[1:]))
res.raise_for_status()

soup = bs4.BeautifulSoup(res.text)

linkElems = soup.select('div#main > div > div > div > a')  
numOpen = min(5, len(linkElems))
for i in range(numOpen):
    webbrowser.open('http://google.com' + linkElems[i].get("href"))

上面的代码从命令行参数中获取输入

the above code takes input from commandline arguments

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