我正在使用bool“Hello!Python”中的以下代码:
import urllib2
from bs4 import BeautifulSoup
import os
def get_stock_html(ticker_name):
opener = urllib2.build_opener(urllib2.HTTPRedirectHandler(),urllib2.HTTPHandler(debuglevel=0),)
opener.addhaders = [('User-agent', "Mozilla/4.0 (compatible; MSIE 7.0; " "Windows NT 5.1; .NET CLR 2.0.50727; " ".NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)")]
url = "http://finance.yahoo.com/q?s=" + ticker_name
response = opener.open(url)
return ''.join(response.readlines())
def find_quote_section(html):
soup = BeautifulSoup(html)
# quote = soup.find('div', attrs={'class': 'yfi_rt_quote_summary_rt_top'})
quote = soup.find('div', attrs={'class': 'yfi_quote_summary'})
return quote
def parse_stock_html(html, ticker_name):
quote = find_quote_section(html)
result = {}
tick = ticker_name.lower()
result['stock_name'] = quote.find('h2').contents[0]
if __name__ == '__main__':
os.system("clear")
html = get_stock_html('GOOG')
# print find_quote_section(html)
print parse_stock_html(html, 'GOOG')
收到以下错误:
Traceback (most recent call last):
File "dwlod.py", line 33, in <module>
print parse_stock_html(html, 'GOOG')
File "dwlod.py", line 25, in parse_stock_html
result['stock_name'] = quote.find('h2').contents[0]
AttributeError: 'NoneType' object has no attribute 'contents'
我是新手,并不知道该怎么做。这本书错了吗?
ADDED
我刚刚将result['stock_name'] = quote.find('h2').contents[0]
替换为:
x = BeautifulSoup(html).find('h2').contents[0]
return x
现在,没有任何回复,但错误不再出现。那么,原始的python语法是否有问题?
答案 0 :(得分:2)
虽然雅虎财务有一段时间没有真正改变他们的布局,但是自从该书发布以来,似乎他们可能稍微调整了一下,你需要的信息,如包含股票代码的h2
信息可以是在yfi_rt_quote_summary
yfi_quote_summary
def find_quote_section(html):
soup = BeautifulSoup(html)
quote = soup.find('div', attrs={'class': 'yfi_rt_quote_summary'})
return quote
result
另请注意,如果我们要打印一些明智的None
,我们需要返回def parse_stock_html(html, ticker_name):
quote = find_quote_section(html)
result = {}
tick = ticker_name.lower()
result['stock_name'] = quote.find('h2').contents[0]
return result
>>> print parse_stock_html(html, 'GOOG')
{'stock_name': u'Google Inc. (GOOG)'}
>>>
:
find
顺便说一句,>>> help(BeautifulSoup(html).find)
find(self, name=None, attrs={}, recursive=True, text=None, **kwargs) method of BeautifulSoup.BeautifulSoup instance
Return only the first child of this Tag matching the given
criteria.
只是找到第一场比赛。
BeautifulSoup
似乎是空的,findall
也有>>> BeautifulSoup(html).findAll('h2')[3].contents[0]
u'Google Inc. (GOOG)'
,它会返回所有匹配。
{{1}}
似乎第四个值是我们正在寻找的......但是,我确定你没有这样做,但请不要每次解析整个文档,这可能非常昂贵。