How to make state variables accessible in Status dictionary of neuron model about nestml HOT 5 CLOSED

What I found out:
If I put the state variable in the state block instead of the initial_values block, NESTML complains that

The variable has to be defined in the 'initial_values' block for being unsed on the left side of an ODE

Putting the variable in both blocks (initial_values and state) leads to the error:

The variable is defined multiple times

So, how to make sure that a state variable that is governed by an ODE enters the state dictionary?
By the way: The initial_values is not documented in doc/syntax.md .

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Another finding: Looking into the generated C++-Files, we found that the get_v and set_v Function exists, but it does not appear in the set_status Function.

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@mschmidt87
To put it simply: It's a missing feature which I will include in one of the next updates of PyNestML.
Explanation: The initial_values is something new which has been added not that long ago, thus several features for code generation has not yet been updated to support the generation of these properties. NestML error messages are correct: by declaring the variable in both, it leads to a redeclaration. Otherwise, if you put it only in the state block, the ODEs are not provided with any starting values. So it is correct to simply state those variables in the init values block.
I will fix the problem of missing get/set in the get_status/set_status and update this ticket here to inform you.

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@mschmidt87
I have updated PyNestML and included this feature. Until it is merged into the official branch, feel free to use this one:
https://github.com/kperun/nestml/tree/stable_PyNestML

set_status and get_status now also include everything to access the variables of the initial values block. So you can use SetStatus(neuron, {'v': -60., 'g_k': 0.}) where v is an initial values variable. If there are any bugs, please report them.
Best regards
Konstantin

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Issue closed, since set_status for initial values has been integrated into the master branch.

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