如何有條件地只記錄某些類別的東西？

Question

事情是這樣的：

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

類是第一類對象的Python：

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

注：他們不是字符串，它們是對象。不要與"Foo"進行比較，而要與Foo

Answer 2

這應該工作：

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