def initialize(**kwds):
obj = Bunch(**kwds)
#
# Set obj.available
#
try:
opt = SolverFactory(obj.name, solver_io=obj.io)
except:
opt = None
if opt is None or isinstance(opt, UnknownSolver):
obj.available = False
elif not opt.available(exception_flag=False):
obj.available = False
elif hasattr(opt, 'executable') and opt.executable() is None:
obj.available = False
elif not opt.license_is_valid() \
and obj.name not in licensed_solvers_with_demo_mode:
obj.available = False
else:
obj.available = True
#
# Set the limits for the solver's "demo" (unlicensed) mode:
# ( nVars, nCons, nNonZeros )
obj.demo_limits = (None, None, None)
if obj.available:
if obj.name == "baron" and not opt.license_is_valid():
obj.demo_limits = (10, 10, 50)
#
# Check capabilities, even if the solver is not available
#
if not (opt is None or isinstance(opt, UnknownSolver)):
for _c in obj.capabilities:
if not _c in opt._capabilities:
raise ValueError("Solver %s does not support capability %s!" %
(obj.name, _c))
#
# Get version
#
if obj.available:
obj.version = opt.version()
return obj
