python - urlopen、BeautifulSoup 和 UTF-8 问题

Question

我只是想检索一个网页，但不知何故，HTML 文件中嵌入了一个外来字符。当我使用“查看源代码”时，这个字符不可见。

isbn = 9780141187983
url = "http://search.barnesandnoble.com/booksearch/isbninquiry.asp?ean=%s" % isbn
opener = urllib2.build_opener()
url_opener = opener.open(url)
page = url_opener.read()
html = BeautifulSoup(page) 
html #This line causes error.

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 21555: ordinal not in range(128)

我也试过...

html = BeautifulSoup(page.encode('utf-8'))

如何在不出现此错误的情况下将此网页读入 BeautifulSoup？

Answer 1

当您尝试打印BeautifulSoup 文件的表示时，实际上可能会发生此错误，如果我怀疑您正在交互式控制台中工作，则会自动发生此错误。

# This code will work fine, note we are assigning the result 
# of the BeautifulSoup object to prevent it from printing immediately.
from BeautifulSoup import BeautifulSoup
soup = BeautifulSoup(u'\xa0')

# This will probably show the error you saw
print soup

# And this would probably be fine
print soup.encode('utf-8')

Answer 2

您可以尝试以下方法：

import codecs 
f = codecs.open(filename,'r','utf-8')
soup = BeautifulSoup(f.read(),"html.parser")

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