【发布时间】：2021-10-29 13:48:25
【问题描述】：
我对 python 非常陌生，而且总体上还是一个开发新手。我的任务是遍历一个 div，我能够返回一些数据。但是，当不存在标签时，我得到空结果。谁能帮忙——我已经研究和尝试了好几天了？我非常感谢您的耐心和解释。我正在尝试提取以下内容：
- 开始日期 [即，2021 年 7 月 31 日星期六]，我根据我的代码从中获得结果
- 结束日期 [即，2021 年 8 月 20 日星期五] 根据我的代码，我得到 no 结果
- 说明 [即 20 晚新品！马耳他、亚得里亚海和希腊] 根据我的代码，我得到 no 结果
- 船舶名称 [即 Viking Sea]，我根据我的代码获得结果
<div class="cd-info"> <!-- Start cd-info -->
From <b>Sat 31 Jul 2021</b><br>
(To Fri 20 Aug 2021)<br>
<b>20 Night New! Malta, The Adriatic & Greece</b><br>
Ship
<a class="red" href="/cruise-ship-viking-sea.html">Viking Sea</a>
<br>
<span class="mobile-no-desktop-yes"><br></span>
More details at<br>
<a target="_blank" onclick="trackOutboundLink('https://www.vikingcruises.com/oceans/cruise-destinations/eastern-mediterranean/malta-adriatic-and-greece/index.html');" href="https://www.vikingcruises.com/oceans/cruise-destinations/eastern-mediterranean/malta-adriatic-and-greece/index.html">
<img class="noborder" src="/logos/viking-cruises.gif" alt="More details for 20 Night New! Malta, The Adriatic & Greece at Viking Cruises">
</a>
</div>这是我的代码（请不要评判..哈哈）
import requests
from requests import get
from bs4 import BeautifulSoup
import pandas as pd
import numpy as np
url = "https://www.cruisetimetables.com/cruisesearch.html?id=cse&sailmonth=Jul%202021&destination=Any&departureport=&arrivalport=&openjawcruise=&portofcall=&cruiseship=&duration=Any&chartercruise="
headers = {"Accept-Language": "en-US, en;q=0.5"}
results = requests.get(url, headers=headers)
soup = BeautifulSoup(results.text, "html.parser")
#initiate data storage
cruisestartdate = []
cruiseenddate = []
itinerarydescription = []
cruiseshipname = []
cruisecabinprice = []
destinationportname = []
portdatetime = []
cruise_div = soup.find_all('div', class_='cd-info')
#our loop through each container
for container in cruise_div:
#cruise start date
startdate = container.b.text
print(startdate)
cruisestartdate.append(startdate)
# cruise end date
enddate = container.string
cruiseenddate.append(enddate)
# ship name
ship = container.a.text
cruiseshipname.append(ship)
#pandas dataframe
cruise = pd.DataFrame({
'Sail Date': cruisestartdate,
'End Date': cruiseenddate,
#'Description': description,
'Ship Name': cruiseshipname,
#'imdb': imdb_ratings,
#'metascore': metascores,
#'votes': votes,
#'us_grossMillions': us_gross,
})
print(soup)
print(cruisestartdate)
print(cruiseenddate)
print(itinerarydescription)
print(cruiseshipname)```
这是我的打印结果：
['2021 年 7 月 31 日星期六'] [无] [] ['维京海']
【问题讨论】：
标签： python html css web-scraping beautifulsoup