tupledict.sum()
sum ( pattern )
Returns the sum of the values associated with keys that match the
specified pattern. If the values are Gurobi Var objects, the
result is a LinExpr. The pattern should provide one value for
each field in the key tuple. A '*' value indicates that any
value is accepted in that field.
Without arguments, this method returns the sum of all values in the
tupledict.
Arguments:
pattern: Pattern to match for a key tuple.
Example usage:
x = m.addVars([(1,2), (1,3), (2,3)])
expr = x.sum() # LinExpr: x[1,2] + x[1,3] + x[2,3]
expr = x.sum(1, '*') # LinExpr: x[1,2] + x[1,3]
expr = x.sum('*', 3) # LinExpr: x[1,3] + x[2,3]
expr = x.sum(1, 3) # LinExpr: x[1,3]
