Corrections to flake8 errors and lint issues
Corrections to flake8 errors and lint issues

cga-harvard/hypermap,cga-harvard/HHypermap,cga-harvard/HHypermap,jmwenda/hypermap,jmwenda/hypermap,cga-harvard/hypermap,jmwenda/hypermap,jmwenda/hypermap,cga-harvard/HHypermap,cga-harvard/hypermap,cga-harvard/hypermap,cga-harvard/HHypermap