Retrieves one or more controls of a problem.

p = xpress.problem ()
[...]
print ("tolerance for feasibility and optimality: ",
  p.getControl ('feastol'), p.getControl ('miprelstop'))
all_ctrls = p.getControl ()
ctrl_subset = p.getControl (['presolve', 'miprelstop', 'feastol'])

This function can be passed either a single control name, whose value will be returned, or a list of control names, in which case the return value is a dictionary associating each key in the list with its value. If no argument is provided, a dictionary containing all controls of the problem will be returned.

problem.setControl.