标签:erro 一个 ror 需要 == exce import strong 捕获异常
1.URLErrorimport urllib2
if name == ‘main‘ :
url = ‘http://www.567.com‘
req = urllib2.Request(url)
try:
response = urllib2.urlopen(req)
#print response
html = response.read().decode(‘utf-8‘)
print html
except urllib2.URLError as e :
print e.reason
结果 :
URLError
[Errno 11004] getaddrinfo failed
2.HTTPError
import urllib2
if name == ‘main‘ :
url = ‘http://money.163.com/stocks/‘
req = urllib2.Request(url)
try:
response = urllib2.urlopen(req)
#html = response.read()
except urllib2.HTTPError as e:
print e.code
结果:404
3,URLError和HTTPError混合使用
????如果想用HTTPError和URLError一起捕获异常,那么需要将HTTPError放在URLError的前面,因为HTTPError是URLError的一个子类。如果URLError放在前面,出现HTTP异常会先响应URLError,这样HTTPError就捕获不到错误信息了。
一种方法:
import urllib2
if name == ‘main‘ :
url = ‘http://news.baidu.net‘
req = urllib2.Request(url)
try :
response = urllib2.urlopen(req)
html = response.read().decode(‘utf-8‘)
print html
except urllib2.HTTPError as e:
print ‘HTTPError‘
print e.code
except urllib2.URLError as e:
print ‘URLError‘
print e.reason
二种方法使用函数hasattr():
if __name__ == ‘__main__‘ :
url = ‘http://www.567.com‘
req = urllib2.Request(url)
try:
response = urllib2.urlopen(req)
html = response.read().decode(‘utf-8‘)
print html
except urllib2.URLError as e :
if hasattr(e,‘code‘) :
print ‘HTTPError‘
print e.code
elif hasattr(e,‘reason‘) :
print ‘URLError‘
print e.reason
标签:erro 一个 ror 需要 == exce import strong 捕获异常
原文地址:http://blog.51cto.com/7175088/2299308