check line 130 if zcolsum > 0: # DEBUG, check how could zcolsum = 0 z = [ (zi / zcolsum) for zi in z] why zcolsum can be equal to zero
check line 130
if zcolsum > 0: # DEBUG, check how could zcolsum = 0
z = [ (zi / zcolsum) for zi in z]
why zcolsum can be equal to zero