python AttributeError: class XXX has no attribute '__class__' -


who can me exception?

 file "/root/anaconda2/lib/python2.7/site-packages/numba/dispatcher.py", line 305, in _compile_for_args argtypes.append(self.typeof_pyval(a)) file "/root/anaconda2/lib/python2.7/site-packages/numba/dispatcher.py", line 429, in typeof_pyval   file "/root/anaconda2/lib/python2.7/site-packages/numba/typing/typeof.py", line 28, in typeof ty = typeof_impl(val, c) file "/root/anaconda2/lib/python2.7/site-packages/singledispatch.py", line 210, in wrapper return dispatch(args[0].__class__)(*args, **kw) attributeerror: class featureencoding has no attribute '__class__'

not every instance has __class__ attribute. general recommendation: in cases it's better use type instead of __class__ nevertheless.

for example old-style classes don't have class:

>>> class a: ...   pass ... >>> a.__class__ attributeerror: class has no attribute '__class__'  >>> int.__class__  # comparison class of int class <type 'type'>

but type works:

>>> type(a) <type 'classobj'>

note: instances of old-style classes have __class__ attribute

>>> = a() >>> a.__class__ <class __main__.a @ 0x0000000002e61168>

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