如何有条件地只记录某些类别的东西？

Question

事情是这样的：

if self.__class__ == "User": 
       logging.debug("%s non_pks were found" % (str(len(non_pks)))) 

In [2]: user = User.objects.get(pk=1) 

In [3]: user.__class__ 
Out[3]: <class 'django.contrib.auth.models.User'> 

In [4]: if user.__class__ == 'django.contrib.auth.models.User': print "yes" 
    ...: 

In [5]: user.__class__ == 'django.contrib.auth.models.User' 
Out[5]: False 

In [6]: user.__class__ == 'User' 
Out[6]: False 

In [7]: user.__class__ == "<class 'django.contrib.auth.models.User'>" 
Out[7]: False 

Answer 1

类是第一类对象的Python：

>>> class Foo(object): 
...  pass 
... 
>>> a = Foo() 
>>> a.__class__ == Foo 
True 

注：他们不是字符串，它们是对象。不要与"Foo"进行比较，而要与Foo

Answer 2

这应该工作：

if user.__class__.__name__ == 'User':