from functools import singledispatchmethod
 
class C:
 @singledispatchmethod
 def sdm(self, a):
 pass
 
C().sdm.__code__

 Traceback (most recent call last):
 File "<python-input-3>", line 1, in <module>
 C().sdm.__code__
 File "/home/bswck/Python/cpython/Lib/functools.py", line 1096, in __getattr__
 raise AttributeError
-AttributeError: . Did you mean: '__call__'?
+AttributeError: '_singledispatchmethod_get' object has no attribute '__code__'. Did you mean: '__call__'?

class C:
 foobar = 1
 
 def __getattr__(self, _):
 raise AttributeError
C().foboar

Traceback (most recent call last):
 File "/home/bswck/Python/cpython/t.py", line 7, in <module>
 C().foboar
 File "/home/bswck/Python/cpython/t.py", line 5, in __getattr__
 raise AttributeError
AttributeError: . Did you mean: 'foobar'?