Examples

import xpress as xp

p = xp.problem ()

p.setControl ({'miprelstop': 1e-5, 'feastol': 1e-4})
p.setControl  ('miprelstop', 1e-5)

print (p.getControl  ('miprelstop') )          # print the current value of miprelstop
print (p.getControl  ('maxtime', 'feastol'))   # print a dictionary with the current
                                               # value of miprelstop and feastol
print (p.getControl (['presolve', 'miplog']))  # Same output
print (p.getControl ())                        # print a dictionary with ALL control

# Initialize a dictionary with two controls and their value. Then
# change their value conditionally and set their new (possibly
# changed) value.

myctrl = p.getControl (['miprelstop', 'feastol'])

if (myctrl['miprelstop'] <= 1e-4):
    myctrl['miprelstop']  = 1e-3
    myctrl['feastol']     = 1e-3
else:
    myctrl['feastol']     = 1e-4

p.setControl (myctrl)