Obtains a copy of a problem.

p = xpress.problem()
x = [xpress.var() for _ in range(10)]
p.addVariable(x)
p.addConstraint(xpress.Sum(x) <= 10)
p2 = p.copy() # add a constraint that won't be in p
p2.addConstraint(xpress.Sum(x) >= 6) # x[0] is deleted from p2
p2.delVariable(x[0])

The objects of the copied problem (variables, constraints, SOSs) are the same as the source problem, i.e., the one of which a copy was created. Therefore, any object that existed in the source problem can be addressed and used in the copy problem.

problem.copycallbacks.