Release 1.2.0

Features Added

• Added checking for additional input after the data block, and raising a warning if it exists (#525).
• Allow multiple universe fills to accept 2D MNCP lattices (#719).
• Make LatticeType.RECTANGULAR and LatticeType.HEXAHEDRAL synonymous (#808).
• Allow setting cell.fill.universes with a numpy array of universe IDs (#736).

Performance Improvement

• Optimized $\mathcal{O}(N^2)$ scaling in montepy.NumberedObjectCollection.request_number by improving NumberedObjectCollection.check_number to $\mathcal{O}(N)$ (#786).

Bugs Fixed

• Fixed bug where lines that were the allowed length was raising a LineOverRunWarning when read by MontePy (#517).
• Added descriptive TypeError messages (#801)
• Fixed a bug that caused to write an extra termination line between the data block and the cell data section in the MCNP input. (#819) (#703).

Documentation

Added a web browser instance of jupyter to the website allowing testing out MontePy with no python installed locally (#796).

• Improved documentation for NumberedObjectCollection on Slicing behavior. (#798)
• Reorganized Python API documentation. Some hyperlinks may be broken now (#828).

Deprecations

• Dropped support for python 3.9 through 3.11, and numpy 1.26 in order to comply with SPEC 0 (#780).

Contributors

• @digvijay-y
• @kordusas
• @tjlaboss
• @Kaos599
• @MicahGale

What's Changed

• adopt spec 0 by @MicahGale in #781
• Drop numpy 1.26 and Python 3.11 by @MicahGale in #807
• Feature: Set cell.fill.universes with an array of IDs by @digvijay-y in #815
• Add support for python 3.14, and drop prior to 3.12 by @MicahGale in #820
• Rename hex by @tjlaboss in #822
• Remove python 3.9 dead code by @MicahGale in #824
• Stage release 1.2.0 by @MicahGale in #823
• Fixed how API docs are generated by @MicahGale in #828
• Add: boundary condition type to repr for surfaces by @digvijay-y in #831
• Make multiple universe fills accept < 3 dimensions by @digvijay-y in #835
• Update ipykernel requirement from ~=6.0 to >=6,<8 by @dependabot[bot] in #836
• Feature/525 detect empty lines by @kordusas in #819
• Bump actions/download-artifact from 5 to 6 by @dependabot[bot] in #840
• Bump actions/upload-artifact from 4 to 5 by @dependabot[bot] in #839
• Bump sigstore/gh-action-sigstore-python from f909491f27c345faa936da468c9ddfac57cbeb49 to 27dac9cce16c9883a0d4b51c9e0a520102d68016 by @dependabot[bot] in #838
• Improve NumberedObjectCollection.check_number by @digvijay-y in #841
• Update default importance values to 1.0 in Importance class and tests by @Kaos599 in #830
• Temporarily fixed parsing error with FMESH by @MicahGale in #850
• Used semi-emperical mass formula to avoid testing with ridiculous nuclides by @MicahGale in #851
• Added Jupyter Lite to Website for in browser python. by @MicahGale in #843
• Stage release 1.2.0 by @MicahGale in #845

New Contributors

• @Kaos599 made their first contribution in #830

Full Changelog: v1.1.3...v1.2.0

Release 1.1.3

Dependencies

Pinned ipykernel to version 6 (#833).

Documentation

• Improved documentation for NumberedObjectCollections on Slicing behavior. (#798)

Bugs Fixed

• Fixed bug where lines that were the allowed length was raising a LineOverRunWarning when read by MontePy (#517).
• Added descriptive TypeError messages (#801)

Full Changelog: v1.1.2...v1.1.3

Contributors

• @MicahGale
• @digvijay-y

Release 1.1.2

Code Quality

• Refactor montepy.errors to montepy.exceptions, to reflect that it also contains warnings (#764).

Deprecations

• Marked montepy.errors as deprecated, with a FutureWarning, use montepy.exceptions instead. (#764).

Bugs Fixed

• Fixed parsing error where MontePy could not handle a fill matrix that was sparse (#601).

PRs

• Refactor montepy.errors -> montepy.exceptions by @tjlaboss in #778
• Bump sigstore/gh-action-sigstore-python from da62987e6c3e005b9835a67dd171c6e23ec6cfd6 to 047e8aa38a2a125cc0bf1332cfb9b53f9fdc0733 by @dependabot[bot] in #787
• Make it Possible to have sparse fill matrices by @MicahGale in #695
• Version 1.1.2 release by @MicahGale in #788

Full Changelog: v1.1.1...v1.1.2

Release 1.1.1

Features Added

• Added demonstration jupyter notebooks for working with Pin Cell and PWR assemblies in MontePy.

Bugs Fixed

• Fixed bug where surfaces created from scratch couldn't be accurately written out to the file (#652).
• Fixed bug where surface transformations couldn't be unset and exported properly (#711).
• Fixed bug where negative numbers were treated as valid by append_renumber (#690).
• Fixed bug that couldn't parse SDEF by simply not parsing the input for the time being (#767).
• Fixed parsing bug with DE LOG style inputs by simply not parsing them for now (#767).

Pull Requests

#750, #767, #772, #773, #774, #747, #775

Contributors

@MicahGale, @tjlaboss

Release 1.1.0

Features Added

• Added Universe.filled_cells, a generator that yields the cells filled with that universe instance (#361).
• Added __eq__ dunder method to Universe to support equality comparisons (#361).
• Changed general plane constants checker to support more than 9 constants (#761).

Bugs Fixed

• Fixed bug where MontePy would overly aggressively round outputs and remove the user's intent (#756).
• Fixed bug where a cell complement in the first five characters causes a spurious vertical mode detection (#753).

Contributors

• @kordusas
• @MicahGale
• @pferney05

Release 1.0.0

Changes

This release primarily focuses on redesigning the material interface. For details see the migration guide. Also the updated getting started guide shows how to use a lot of these new features.

Materials

The biggest change is that Material is no longer a wrapper of dictionary; it now behaves like a list.

This will make it a lot easier to do the following with materials:

• Query, edit, and add nuclides to a specific material
• Change what the default library, e.g., nlib=80c for a specific material
• Find all materials that contain certain nuclides
• Create a new nuclide intuitively: e.g., montepy.Nuclide("U-235m1.80c")
• Materials are now iterable themselves.

General

This will also make it a lot easier to work with MontePy objects in general by:

• If a typo in made in an attribute an error raised. This prevents cell.nuber = 5 from having no effect.
• Create new objects with their just their string version of the MCNP input. You can create a new cell with montepy.Cell("1 0 -2 imp:n=1"). In a lot of cases it's a better idea to do: problem.parse("1 0 -2 imp:n=1").

Features Added

Material Interface Changes

• Redesigned how Materials hold Material_Components. See migration guide (#507)
• Made it easier to create an Isotope (now Nuclide): montepy.Nuclide("H-1.80c") #505
• Improved material printing to avoid very long lists of components (#144)
• Allow querying for materials by components (#95)
• Added support for getting and setting default libraries, e.g., nlib, from a material (#369)
• Added most objects to the top level so they can be accessed like: montepy.Cell.
• Made Material.is_atom_fraction settable (#511)
• Added Material.clear to delete all components from a Material (#655).

General Updates

• When a typo in an object attribute is made an Error is raised rather than silently having no effect (#508)
• Made NumberedObjectCollections act like a set (#138)
• Automatically added children objects, e.g., the surfaces in a cell, to the problem when the cell is added to the problem (#63).
• Added ability to parse all MCNP objects from a string (#88).
• Added function: MCNP_Problem.parse to parse arbitrary MCNP object (#88).
• Warnings are no longer raised for comments that exceed the MCNP maximum line length (#188).
• If an importance is set for a particle type not included in mode a warning is raised, not an exception now (#381).
• Allowed any numbers.Real or numbers.Integral for when type is enforced (#679).
• Combine multiple LineExpansionWarnings coming from the same object on export (#198).

Bugs Fixed

• Made it so that a material created from scratch can be written to file (#512).
• Added support for parsing materials with parameters mixed throughout the definition (#182).
• Fixed bug where surf.is_reflecting would put an extra space in the output e.g., * 1 PZ... (#697).
• Fixed bug where setting a lattice would print as LAT=None. Also switched CellModifier to print in the cell block by default (#699).
• Fixed bug that wouldn't allow cloning most surfaces (#704).
• Fixed bug that crashed when some cells were not assigned to any universes (#705).
• Fixed bug where setting surf.is_reflecting to False did not always get exported properly (#709).
• Fixed bug where setting multiple universes for a cell fill not being properly exported (#714).
• Corrected bug where blank importance objects can't be printed (#549).
• Fixed bug where the i ("x") and k ("z") dimensions of multiple universe matrix fills were switched (#726).

Breaking Changes

• Removed Material.material_components (#507)
• Removed Isotope and changed them to Nuclide
• Removed MCNP_Problem.add_cell_children_to_problem as it is no longer needed.

Release 1.0.0a4

Bug fixes

• Fixed bug where surf.is_reflecting would put an extra space in the output e.g., * 1 PZ... (#697).
• Fixed bug where setting a lattice would print as LAT=None. Also switched CellModifier to print in the cell block by default (#699).
• Fixed bug that wouldn't allow cloning most surfaces (#704).
• Fixed bug that crashed when some cells were not assigned to any universes (#705).
• Fixed bug where setting surf.is_reflecting to False did not always get exported properly (#709).

Release 0.5.5

Bug Fixes

• Fixed parsing bug with sigma baryon particles (e.g., +/-) (#671).

Documentation Updates

• Various documentation updates from PyOpenSci review.

Release 1.0.0a3

Features Added

• Particle type exceptions are now warnings, not errors (#381).
• Added Material.clear to Material to clear out all nuclides (#665).
• Avoided multiple LineExpansionWarnings coming from the same object on export (#198).

Release 1.0.0a2

Second alpha-release of 1.0.0

Features added

• Warnings are no longer raised for comments that exceed the maximum line lengths (#188).
• Particle type exceptions are now warnings, not errors (#381).
• Allow any Real type for floating point numbers and any Integral type for integer numbers during type enforcement (#679).
• Added strict option to contains and changed contains to contains_all, and contains_any.