Revert "Import statement moved to top"
Revert "Import statement moved to top"

This reverts commit d67b56ae7726240ff870dd8ab9385aa80c8d2cc4.

peastman/deepchem,miaecle/deepchem,miaecle/deepchem,deepchem/deepchem,miaecle/deepchem,lilleswing/deepchem,lilleswing/deepchem,lilleswing/deepchem,ktaneishi/deepchem,ktaneishi/deepchem,peastman/deepchem,ktaneishi/deepchem,deepchem/deepchem