第一種方法

Traceback (most recent call last):

?File "c:\Users\Administrator\Desktop\text\test.urlliber.py", line 5, in <module>

? ?responsel=urllib2.urlopen(url)

?File "C:\python27\lib\urllib2.py", line 127, in urlopen

? ?return _opener.open(url, data, timeout)

?File "C:\python27\lib\urllib2.py", line 402, in open

? ?req = meth(req)

?File "C:\python27\lib\urllib2.py", line 1113, in do_request_

? ?raise URLError('no host given')

URLError: <urlopen error no host given>