Example problems in python3.6

Hi players,

I am a newbie in Mxnet, and have successfully installed it on my workstation.
It runs well on the example of “image-classification”, but doesn’t work on “speech-demo” example.
Though I fixed some bugs caused by python3, it still doesn’t work when comes to the model training.
Errors as follow:
File miniconda3/envs/gluon/lib/python3.6/site-packages/mxnet/ndarray/ndarray.py, line 316, in bool
ValueError: The truth value of an NDArray with multiple elements is ambiguous.


Since you’re using conda, does python2 work for you?
For the incompatibility bugs you found for python3, do you mind posting a fix (pull request) on the mxnet repository?