opt.add_option('--init_randomsampling_samples',type='int',dest='init_randomsampling_samples',help='Number of samples used for the initialization [default: 10]')
opt.add_option('--stop_maxiterations_iterations',type='int',dest='stop_maxiterations_iterations',help='Number of iterations performed before stopping the optimization [default: 190]')
# check if a lib exists for both osx (darwin) and GNU/linux