https://github.com/davidmstraub/pylha

Python package to convert data files in SLHA and similar formats to python objects, JSON, or YAML
https://github.com/davidmstraub/pylha

hep high-energy-physics particle-physics python

Last synced: 2 days ago
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Python package to convert data files in SLHA and similar formats to python objects, JSON, or YAML

• Host: GitHub
• URL: https://github.com/davidmstraub/pylha
• Owner: DavidMStraub
• License: mit
• Created: 2017-07-17T13:46:19.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2019-07-05T12:37:47.000Z (over 5 years ago)
• Last Synced: 2024-10-13T16:50:46.919Z (about 1 month ago)
• Topics: hep, high-energy-physics, particle-physics, python
• Language: PLSQL
• Homepage:
• Size: 43.9 KB
• Stars: 2
• Watchers: 4
• Forks: 2
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
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# pylha

A Python package to convert data files in SLHA and similar formats to Python objects, JSON, or YAML.

## Motivation

In particle physics phenomenology, structured data like model parameters are frequently exchanged in a file format inspired by the [SUSY Les Houches Accord](https://arxiv.org/abs/0801.0045), for instance

```

Block MODSEL		     # Select model

    1    1		     # sugra

Block MINPAR		     # Input parameters

    1   1.000000000e+02	     # m0

    2   2.500000000e+02	     # m12

    3   1.000000000e+01	     # tanb

    4   1.000000000e+00	     # sign(mu)

    5  -1.000000000e+02	     # A0

```

Other examples include the [FLHA](https://arxiv.org/abs/1008.0762) ("Flavour Les Houches Accord") and the input and outputs files formats of [DSixTools](https://dsixtools.github.io/) and [Rosetta](https://rosetta.hepforge.org/).

While [several well-tested parsers](http://skands.physics.monash.edu/slha/) exist for the original SLHA format, most of these are not robust enough to treat the generalized formats. The purpose of pylha is to provide a simple low-level Python package that allows to import any file in a "LHA-like" format into a Python data structure and export it back to industry-standard exchange formats like JSON or YAML (or back to LHA format).

## Usage

At the moment, pylha can only be used as a Python module (command line scripts might be added later). To install it, use

```

pip3 install pylha

```

The above example string can be converted to a JSON string using

```python

import pylha

d = pylha.load(example_string)

pylha.dump(d, 'json')

```

Which will return

```json

{

  "BLOCK": {

    "MODSEL": {

      "values": [[1, 1]]

    },

    "MINPAR": {

      "values": [[1, 100.0], [2, 250.0], [3, 10.0], [4, 1.0], [5, -100.0]]

    }

  }

}

```