小编Ped*_*dro的帖子

我是Python的新手,我坚持这个问题.我试图比较两个"异常对象",例如:

try:
    0/0
except Exception as e:
    print e
>> integer division or modulo by zero

try:
    0/0
except Exception as e2:
    print e2
>> integer division or modulo by zero

e == e2
>> False

e is e2
>> False

我应该如何进行这种比较以获得"真实"？

我想做什么:

class foo():
    def bar(self, oldError = None):
        try:
            return urllib2.urlopen(someString).read()                   
        except urllib2.HTTPError as e:
            if e.code == 400: 
               if e != oldError: print 'Error one'
            else: 
               if e != oldError: print "Error two"
            raise
         except urllib2.URLError as …