Try our new documentation site (beta).
Filter Content By
Version
Text Search
${sidebar_list_label} - Back
Filter by Language
Building a multi-dimensional array of variables
The next step in our example (after creating an empty Model
object) is to add variables to the model. The variables are
stored in a dictionary flow
:
m = Model('netflow') flow = {} for h in commodities: for i,j in arcs: flow[h,i,j] = m.addVar(ub=capacity[i,j], obj=cost[h,i,j], name='flow_%s_%s_%s' % (h, i, j)) m.update()The
flow
variable is triply subscripted: by commodity, source
node, and destination node. Note that the dictionary only contains
variables for source, destination pairs that are present in arcs
.