personindexwarehouse = []
Totalperwarehouse = []

for i in range(W):
	personindexwarehouse.append([]) # each person belongs to which warehouse
	Totalperwarehouse.append(numpy.zeros(400))

for i in numpy.arange(len(C_coordinates)):
    personindexwarehouse[warehouseindex[i]].append(i)

 # what each of 1250 people ordered 1250x400
for i, val in enumerate(personindexwarehouse):
    for j in val:
       Totalperwarehouse[i]=numpy.array(Totalperwarehouse[i])+numpy.array(C_orders[j])

  #Totalperwarehouse is the final list of what each warehouse has to deliver