How do we delete a batch of constraints in docplex?

Question

I used a list of a constraint numbers or a list of constraint names but this does not work with command m.remove_constraints().

m.add(sumbs[i] <= a[i], "ct_sum_%d" %i)

A.append("ct_sum_%d" %i)

Then later on when I want to change the model: m.remove_constraints(A)

What is the correct way of doing this?

score 0 · Accepted Answer · answered Jan 06 '21 at 15:53

Model.add_constraints() returns the list of newly added constraints.

Similarly, Model.remove_constraints takes a collection of constraint objects, not names , not indices. For example:

cts = mdl.add_constraints(...)
mdl.remove_constraints(cts[:3]) # remove the first three

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