写爬虫的时候经常出现一种错误:Traceback (most recent call last):
File "crawlertest.py", line 3, in
con = urllib2.urlopen(req)
File "C:\python27\lib\urllib2.py", line 154, in urlopen
return opener.open(url, data, timeout)
File "C:\python27\lib\urllib2.py", line 437, in open
response = meth(req, response)
File "C:\python27\lib\urllib2.py", line 550, in http_response
'http', request, response, code, msg, hdrs)
File "C:\python27\lib\urllib2.py", line 475, in error
return self.callchain(*args)
File "C:\python27\lib\urllib2.py", line 409, in callchain
result = func(*args)
File "C:\python27\lib\urllib2.py", line 558, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 503: Service Unavailable
原代码如下:
import urllib2
req=urllib2.Request('https://www.amazon.com/')
con = urllib2.urlopen(req)
doc = con.read()
print doc
这种错误提示是什么意思?如何进行改正?