fix for AttributeError: 'NoneType' object has no attribute 'items'
fix for AttributeError: 'NoneType' object has no attribute 'items'
Coxious/python-nvd3,oz123/python-nvd3,yelster/python-nvd3,Coxious/python-nvd3,oz123/python-nvd3,pignacio/python-nvd3,liang42hao/python-nvd3,BibMartin/python-nvd3,liang42hao/python-nvd3,vdloo/python-nvd3,yelster/python-nvd3,mgx2/python-nvd3,BibMartin/python-nvd3,oz123/python-nvd3,mgx2/python-nvd3,Coxious/python-nvd3,yelster/python-nvd3,pignacio/python-nvd3,liang42hao/python-nvd3,vdloo/python-nvd3,vdloo/python-nvd3,pignacio/python-nvd3,BibMartin/python-nvd3,mgx2/python-nvd3