Update test_mnist.py
Update test_mnist.py
rbharath/deepchem,lilleswing/deepchem,Agent007/deepchem,Agent007/deepchem,miaecle/deepchem,deepchem/deepchem,lilleswing/deepchem,ktaneishi/deepchem,rbharath/deepchem,Agent007/deepchem,ktaneishi/deepchem,peastman/deepchem,deepchem/deepchem,miaecle/deepchem,ktaneishi/deepchem,miaecle/deepchem,peastman/deepchem,lilleswing/deepchem