Symbols translation

[albop]

Variables, with optional time subscripts and indices should have three equivalent representations:

1. object (example Symbol(name='β', subscripts=['i'], date=1)
2. normalized string (example β__1__i)
3. latex: (\beta_{i,t+1})

We can define the expected correspondences in https://github.com/EconForge/dolang/blob/master/tests/symbols.yaml .

We should define formally what arguments the objects accept

• name: any valid python/julia identifier without a double underscore ?
• date: signed integer (for now)
• subscripts: list of names

As for the normalized string, initial proposal is: {}__{}__{}'.format(name, (str(date) if date>=0 else 'm'+str(date), str.join('_', subscripts)

So, currently, there is an implementation for 1.->2. under python only. I am not checking the tickbox though until we are sure about the definition/normalization.

[] python: 1.->2.
[] python: 1.->3.
[] python: 2.->1.
[] python: 3.->1. (not urgent)

[] julia: 1.->2.
[] julia: 1.->3.
[] julia: 2.->1.
[] julia: 3.->1. (not urgent)