Travis L.

Right now, the Python API has a lot of hardcoded strings in the code. For example, in [summary.py](https://github.com/openmc-dev/openmc/blob/e08af3c374491133645d46faa6edf8fb625d3a0b/openmc/summary.py): ```python if "dagmc" not in self._f['geometry'].attrs.keys(): . . . for group in...

C++ Tutorials: Missing Chapters

2

A number of the chapters at https://www.learn-cpp.org/ state, > This section does not exist yet. To contribute tutorials, simply fork the following repository: https://github.com/ronreiter/interactive-tutorials Then you may add or edit...

Smart Color Palette Generation with Plot.colorize()

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## Description `Plot.colorize()` is a neat little function that assigns reproducible random colors to each cell or material domain in the geometry. The catch is that these colors are not...

Run Unit Tests First in CI

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## Description I noticed that regression tests are run before unit tests in the OpenMC continuous integration. Currently, it takes ~40 minutes to run the CI testing. Most of that...

Segfault With Single Energy Bin

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MCNPTools experiences a Segmentation Fault when processing a meshtal file with only a single energy bin. A MWE will be posted. MCNPTools attempts to compare to the "Total" bin, regardless...

## Description A minor usability enhancement and a potential "Good First Issue". The cross sections file is usually named _cross_sections.xml_. If a user sets the `OPENMC_CROSS_SECTIONS` environment variable to a...

## Description A tally filter to bin current to the nearest discrete direction. Given a particle with a known direction and a filter with a known set of angles, tally...

* Has over 240 test cases right now -> Currently has over 420 tests. * Update example to use `write_problem()` instead of `write_to_file()` * "Can write out the MCNP problem...

Test an input with tallies

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# Description This PR demonstrates test failures for inputs involving tallies. It exists to run the CI, and is not intended to be merged. Related to Issues #11, #463

Botched Integer Interpolation Expansion

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**Describe the bug** MontePy expands shortcuts for data entry:  The linear interpolation shortcut gets botched upon expansion, being converted to floating point and dropping necessary padding. **To Reproduce** Just...