Python-索引器错误:列表索引超出范围-不工作
这是我的scrap.py代码Python-索引器错误:列表索引超出范围-不工作,python,python-3.x,web-scraping,beautifulsoup,Python,Python 3.x,Web Scraping,Beautifulsoup,这是我的scrap.py代码 from bs4 import BeautifulSoup as soup from urllib.request import urlopen as uReq website = "https://houston.craigslist.org/search/cta" uClient = uReq(website) page_html = uClient.read() uClient.close() soup_html = soup(page_html, "h
from bs4 import BeautifulSoup as soup
from urllib.request import urlopen as uReq
website = "https://houston.craigslist.org/search/cta"
uClient = uReq(website)
page_html = uClient.read()
uClient.close()
soup_html = soup(page_html, "html.parser")
result_html = soup_html.findAll("p", {"class":"result-info"})
filename = "products.csv"
f = open(filename, "w", encoding='utf8')
headers = "car_name, price\n"
f.write(headers)
for container in result_html:
carname = container.a.text
price_container = container.findAll('span', {'class':'result-price'})
price = price_container[0].text
f.write(carname + "," + price + "\n")
f.close()
在终端上,它工作正常,但是当我循环它时,它会给出以下错误
Traceback (most recent call last):
File "scrap.py", line 23, in <module>
price = price_container[0].text.splitlines()
IndexError: list index out of range
回溯(最近一次呼叫最后一次):
文件“scrap.py”,第23行,在
price=price\u容器[0]。text.splitlines()
索引器:列表索引超出范围
请帮忙。谢谢这是因为有些车没有价格,例如。如果没有价格,您可以将价格设置为
unknown
:
price_container = container.findAll('span', {'class':'result-price'})
if len(price_container) > 0:
price = price_container[0].text
else:
price = 'unknown'
或者您可以跳过那些没有价格的,这样它们就不会写入文件:
price_container = container.findAll('span', {'class':'result-price'})
if len(price_container) == 0:
continue
price = price_container[0].text
我怎样才能按价格分类呢
试试下面这个。它将为您获取所有项目和价格,并处理
索引器
(如果有)
from bs4 import BeautifulSoup
from urllib.request import urlopen
response = urlopen("https://houston.craigslist.org/search/cta")
soup_html = BeautifulSoup(response.read(), "html.parser")
for container in soup_html.find_all("p", {"class":"result-info"}):
carname = container.find_all("a")[0].text
try:
price = container.find_all('span', {'class':'result-price'})[0].text
except IndexError:
price = ""
print(carname,price)
我试图缩短您的代码以使其看起来更好。太棒了。ThanksHow我可以用价格对结果排序吗?@ShahidShabbir:我添加了这个部分。但现在请停止,因为你只是要求两个家伙同时为你工作。我们如何才能获得页面上每个项目中的联系电话和电子邮件地址?正如我所说:请自己完成其余的工作,不要让这里的人为你工作。如果你想让人们为你编程,你通常需要支付他们的费用,对吗?这对你来说很简单,但对我来说很复杂,因为我是Pythonh的新手。如何用价格对结果进行排序?用现有的
print
statementprint(“车名:{}\n价格:{}\n.format(carname,price))
我投票结束这个问题,因为OP希望找到人来规划他的任务,并在每个答案上提出后续问题
from bs4 import BeautifulSoup
from urllib.request import urlopen
response = urlopen("https://houston.craigslist.org/search/cta")
soup_html = BeautifulSoup(response.read(), "html.parser")
for container in soup_html.find_all("p", {"class":"result-info"}):
carname = container.find_all("a")[0].text
try:
price = container.find_all('span', {'class':'result-price'})[0].text
except IndexError:
price = ""
print(carname,price)