Setting a property to unallowed value fails silently

[seanpearsonuk]

Setting a property to a value outside of the allowed values fails but nothing is reported in PyFluent. In Fluent meanwhile "Invalid selection" is displayed in the console. It would be appropriate to propagate an exception*.

>>> s.solver.root.setup.models.viscous.model.get_attr('allowed-values')
['inviscid', 'laminar', 'k-epsilon-standard', 'k-omega-standard', 'mixing-length', 'spalart-allmaras', 'k-kl-w', 'transition-sst', 'reynolds-stress', 'scale-adaptive-simulation', 'detached-eddy-simulation', 'large-eddy-simulation']
>>> s.solver.root.setup.models.viscous.model='bob'
>>> s.solver.root.setup.models.viscous.model()
'k-omega-standard'

* this would change the current TUI behaviour if it uses the API for this.

[dnwillia-work]

Yeah, I would have thought that the second command threw an exception already or put the API into some sort of invalid/error state.

[gyeole]

@dnwillia-work @seanpearsonuk I have created PR for this

[seanpearsonuk]

tested, thanks @gyeole