Import ERROR: Class advice impossible in Python3. Use the @implementer class decorator instead.

Work on colab.

from apex import amp

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-15-84f31a44eed6> in <module>()
     16 from torchsnooper import snoop
     17 import math
---> 18 from apex import amp

3 frames
/usr/local/lib/python3.6/dist-packages/apex/__init__.py in <module>()
     16 from apex.exceptions import (ApexAuthSecret,
     17                              ApexSessionSecret)
---> 18 from apex.interfaces import (ApexImplementation,
     19                              IApex)
     20 from apex.lib.libapex import (groupfinder,

/usr/local/lib/python3.6/dist-packages/apex/interfaces.py in <module>()
      8     pass
      9 
---> 10 class ApexImplementation(object):
     11     """ Class so that we can tell if Apex is installed from other 
     12     applications

/usr/local/lib/python3.6/dist-packages/apex/interfaces.py in ApexImplementation()
     12     applications
     13     """
---> 14     implements(IApex)

/usr/local/lib/python3.6/dist-packages/zope/interface/declarations.py in implements(*interfaces)
    481     # the coverage for this block there. :(
    482     if PYTHON3:
--> 483         raise TypeError(_ADVICE_ERROR % 'implementer')
    484     _implements("implements", interfaces, classImplements)
    485 

TypeError: Class advice impossible in Python3.  Use the @implementer class decorator instead.

Start with apex/interfaces.py, where the Python 3 traceback shows the failing class declaration, and reproduce the problem with from apex import amp. Update the interface declaration as indicated by the error, then verify that importing apex.amp succeeds under Python 3.