ENH: Do not require next state functions for single period models #152
Description
- Feature: simplify user model initialisation.
Is your feature request related to a problem?
Currently, PyLCM requires for the initialisation of a user model for each state a corresponding next state function. If the next state function is missing for a state, _validate_logical_consistency inside the __post_init__ raises a ModelInitilizationError.
If the user model is specified with n_periods=1, the next state function is never executed.
Describe the solution you'd like
I wish to use a PyLCM user model for a single period without having to specify next state functions.
I suspect that a first step is to adapt the __post_init__ of the user model.