英文:
Scraping three diffrent texts in three same html codes
问题
在这段代码中，我只想抓取电影的时长数据，但它还同时抓取了电影的上映日期！我会将HTML代码也附上，以更好地展示问题。
import openpyxl as opxfrom bs4 import BeautifulSoupimport requestswb = opx.Workbook()ws = wb.activews.title = "Movies"header_row = ["Name", "Date", "Rate", "duration"]ws.append(header_row)url = "https://www.imdb.com/chart/top/?ref_=nv_mv_250"header = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36'}response = requests.get(url, headers=header)html_content = response.contentsoup = BeautifulSoup(html_content, "html.parser")movies = soup.find_all("li", class_="ipc-metadata-list-summary-item sc-bca49391-0 eypSaE cli-parent")for movie in movies:name = movie.find("h3", class_="ipc-title__text").text.strip()date = movie.find("span", class_="sc-14dd939d-6 kHVqMR cli-title-metadata-item")rate = movie.find("span", class_="ipc-rating-star ipc-rating-star--base ipc-rating-star--imdb ratingGroup--imdb-rating")duration = movie.find("span", class_="ipc-metadata-list-item__duration").text.strip()print(duration)# wb.save("sample.xlsx")
英文:
In this code I just want to scrape the movies' duration data but it also scrapes the movies' release dates too!!! I post the HTML codes as well to show you the problem better.
import openpyxl as opxfrom bs4 import BeautifulSoupimport requestswb = opx.Workbook()ws = wb.activews.title = "Movies"header_row = ["Name", "Date", "Rate", "duration"]ws.append(header_row)url = "https://www.imdb.com/chart/top/?ref_=nv_mv_250"header = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36'}response = requests.get(url, headers=header)html_content = response.contentsoup = BeautifulSoup(html_content, "html.parser")movies = soup.find_all("li", class_="ipc-metadata-list-summary-item sc-bca49391-0 eypSaE cli-parent")for movie in movies:name = movie.find("h3", class_="ipc-title__text").text.strip()date = movie.find("span", class_="sc-14dd939d-6 kHVqMR cli-title-metadata-item")rate = movie.find("span", class_="ipc-rating-star ipc-rating-star--base ipc-rating-star--imdb ratingGroup--imdb-rating")print(duration.text)# wb.save("sample.xlsx")
答案1
得分: 0
有多种方法可以做到这一点。其中一种是使用 find_all，它返回匹配项的列表。
...duration = movie.find_all('span', class_='sc-14dd939d-6 kHVqMR cli-title-metadata-item')[1]...
下一个方法是使用 select 或 select_one。
duration = movie.select_one('span.sc-14dd939d-6.kHVqMR.cli-title-metadata-item:nth-child(2)')
select 和 select_one 使用 CSS 选择器。在上面的代码中，它搜索 movie 元素内包含 sc-14dd939d-6、kHVqMR 和 cli-title-metadata-item 类的第二个 span。请注意，由于它使用 CSS，它会选择包含这三个类的任何 span，即使有更多的类也会被选中。
要在获取文本之前检查第二个元素是否存在：
duration = duration.text.strip() if duration else '-'
你可以在BeautifulSoup文档中找到更多信息。它写得非常好，有很多示例。
英文:
There are multiple ways to do this. One is using find_all which returns list of matches.
...duration = movie.find_all('span', class_='sc-14dd939d-6 kHVqMR cli-title-metadata-item')[1]...
Next one is using select or select_one.
duration = movie.select_one('span.sc-14dd939d-6.kHVqMR.cli-title-metadata-item:nth-child(2)')
select and select_one uses CSS Selectors. In above code, it searches for 2nd span inside movie element that has classes including sc-14dd939d-6, kHVqMR and cli-title-metadata-item. Note that since it uses css, it selects any span containing those three classes even if there are more classes.
To check if second element is present before taking text:
duration = duration.text.strip() if duration else '-'
You can check more in BeautifulSoup Docs. It is really well-written with numerous examples.
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