Request for example on reading the input file.

[jon-proximafusion]

I've now used pypact to read fluxes files and output files but I don't see a way of reading in the input files.

For example I would like to read this file and get the mass element, density, flux and timesteps into python objects

I've tried the Reader class, FispactInput with from_file, InputData with from_file but not got anything to work. Is this something pypact is able to help with or does it focus more on the output files side of things.

CLOBBER 
GETXS 1 709
GETDECAY 1
FISPACT
* FNS 5 Mins Al
DENSITY 2.70
TOLER 0 1e1 2e-8
TOLER 1 1e1 2e-8
MASS 1.0E-3 1
AL 100.0
MIND 1.E3
HALF
HAZA
GRAPH 5 2 1 1 2 3 4 5
NUCGRAPH 1 0.01 1 2
UNCERT 2
FLUX 1.116E+10
ATOMS
TIME 5.0 MINS
ATOMS
FLUX 0.
NOSTABLE
ZERO
TIME    35 ATOMS
TIME    15 ATOMS
TIME    15 ATOMS
TIME    15 ATOMS
TIME    15 ATOMS
END
* END
/*

[thomasms]

Unfortunately not 😞 .

You can see here that I never implemented the deserialization. At the time pypact had no need for it, it was to read the output not the input, for testing purposes.

The FISPACT-II API does have some reading of the input if I recall (if you have a license).

Otherwise we could quite easily implement such a thing in pypact, but it may take a while to get it in a release.

Maybe ChatGPT can spit out something quickly for your use case?

[jon-proximafusion]

I think we (@jbae11 and myself) are just interested in reading a few things from the input file.

Initially we are keen to be able to read the mass keyword

MASS value

Would pypact be open to PRs that add partial deserialization of the input file?

Then I think it would be possible to get the mass with this code

import pypact as pp
ff = pp.InputData()
pp.from_file(ff, 'Cr_2000exp_5min.i')
material_mass = ff.mass

If we are successful with these simple ones then we are also interested in reading more (e.g. flux, elements, timesteps)

[jon-proximafusion]

updated

[thomasms]

Would pypact be open to PRs that add partial deserialization of the input file?

Of course! This would be very welcome. It would be of great benefit to the library.

[jon-proximafusion]

The PR is now merged and includes and example usage in the tests
https://github.com/shimwell/pypact/blob/eaa3e64b7c78d1669e0a9409f7563d80bac8fc41/tests/input/inputfiletest.py#L9-L30

import pypact as pp
ff = pp.InputData()
pp.from_file(ff, 'reference/test.i')