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                        /Python開發簡單爬蟲

報錯No handlers could be found for logger "bs4.dammit"

運行代碼時報錯：No handlers could be found for logger "bs4.dammit"

#?coding:utf8
import?urllib2
import?bs4
import?re

url?=?'http://www.baidu.com'

request?=?urllib2.Request(url)
request.add_header('user-agent',?'Mozilla/5.0')
response?=?urllib2.urlopen(request)
html_doc?=?response.read()
soup?=?bs4.BeautifulSoup(html_doc,?'html.parser',?from_encoding='utf-8')
links?=?soup.find_all('a')
link?=?soup.find('a',?href=re.compile(r".*preferences.*"))
print?link.name,?link['href'],?link.get_text()

這個代碼運行時而可以成功運行，時而報上述錯誤。不能運行的時候等兩分鐘再運行又可以成功輸出了。