castep-outputs 0.1.3

A package for extracting information from castep outputs

Parser for CASTEP output files

castep_outputs parses the output files of castep into a standard form and is able to subsequently dump the processed data into a standard format.

Install

To install castep_outputs simply run:

pip install castep_outputs

To check it is installed run:

python -m castep_outputs -h

Dependencies

castep_outputs is designed to have no external dependencies beyond the standard library, however, it is possible to use either PyYAML or ruamel.yaml to dump in the YAML format.

Command-line

When run as a commandline tool, it attempts to find all files for the given seedname, filtered by inc args (default: all). Explicit files can be passed using longname arguments. castep_outputs can parse most human-readable castep outputs including: .castep, .param, .cell, .geom, .md, .bands, .hug, .phonon_dos, .efield, .xrd_sf, .elf_fmt, .chdiff_fmt, .pot_fmt, .den_fmt, .elastic, .ts.

to run in basic mode:

python -m castep_outputs seedname

Which will attempt to detect all found files and dump a .json to stdout, ready for piping.

python -m castep_outputs --inc-castep --inc-param seedname

Will parse only the seedname.castep and seedname.param files if found.

python -m castep_outputs seedname.castep

Will parse the single named file and again dump a .json to stdout.

python -m castep_outputs --castep seedname.param

Will attempt to parse the file seedname.param as though it were a .castep file. While not ordinarily useful it can help with manually renamed files.

python -m castep_outputs -o my_file.yaml -f yaml seedname.castep

Will parse seedname.castep, dump it to my_file.yaml in yaml format using the PyYAML engine.

As a module

importing castep_outputs directly puts all of the parsers directly into your local namespace.

The simplest method to use castep_outputs in a tool is to use the parse_single method which attempts to determine the parser from the file extension.

import castep_outputs

my_dict = parse_single('my_file.castep')

If you need a specific parser rather than by extension it is possible to pass them as the second argument, or call them directly.

import castep_outputs

my_dict = parse_single('my_file', parse_castep_file)

with open('my_file', 'r', encoding='utf-8') as inp:
    my_dict = parse_castep_file(inp)

It is recommended that you use parse_single as it uses special file-handling to give better diagnostics if it fails. It is possible to enable more detailed logging via the logging module:

import castep_outputs
import logging

my_dict = parse_single('my_file', loglevel=logging.INFO)

The available parsing functions are:

• parse_castep_file

• parse_cell_param_file

• parse_param_file

• parse_cell_file

• parse_md_geom_file

• parse_md_file

• parse_geom_file

• parse_bands_file

• parse_hug_file

• parse_phonon_dos_file

• parse_efield_file

• parse_xrd_sf_file

• parse_elf_fmt_file

• parse_chdiff_fmt_file

• parse_pot_fmt_file

• parse_den_fmt_file

• parse_elastic_file

• parse_ts_file

Which return processed lists of dicts of data ready for use in other applications.

Full usage

usage: castep_outputs [-h] [-V] [-L {DEBUG,INFO,WARNING,ERROR,CRITICAL}] [-o OUTPUT]
                      [-f {json,ruamel,yaml,pprint,print}] [-t] [-A] [-c] [-g] [-m] [-b] [-p] [-e] [-x] [-H] [-E]
                      [-C] [-P] [-D] [-X] [-T] [--inc-param] [--inc-cell] [--castep [CASTEP ...]]
                      [--geom [GEOM ...]] [--cell [CELL ...]] [--param [PARAM ...]] [--md [MD ...]]
                      [--bands [BANDS ...]] [--hug [HUG ...]] [--phonon_dos [PHONON_DOS ...]]
                      [--efield [EFIELD ...]] [--xrd_sf [XRD_SF ...]] [--elf_fmt [ELF_FMT ...]]
                      [--chdiff_fmt [CHDIFF_FMT ...]] [--pot_fmt [POT_FMT ...]] [--den_fmt [DEN_FMT ...]]
                      [--elastic [ELASTIC ...]] [--ts [TS ...]]
                      ...

Attempts to find all files for seedname, filtered by `inc` args (default: all). Explicit files can be passed
using longname arguments. Parse most human-readable castep outputs including: .castep, .param, .cell, .geom, .md,
.bands, .hug, .phonon_dos, .efield, .xrd_sf, .elf_fmt, .chdiff_fmt, .pot_fmt, .den_fmt, .elastic, .ts

positional arguments:
  seedname              Seed name for data

options:
  -h, --help            show this help message and exit
  -V, --version         show program's version number and exit
  -L {DEBUG,INFO,WARNING,ERROR,CRITICAL}, --log {DEBUG,INFO,WARNING,ERROR,CRITICAL}
                        Verbose output
  -o OUTPUT, --output OUTPUT
                        File to write output, default: screen
  -f {json,ruamel,yaml,pprint,print}, --out-format {json,ruamel,yaml,pprint,print}
                        Output format
  -t, --testing         Set testing mode to produce flat outputs
  -A, --inc-all         Extract all available information
  -c, --inc-castep      Extract .castep information
  -g, --inc-geom        Extract .geom information
  -m, --inc-md          Extract .md information
  -b, --inc-bands       Extract .bands information
  -p, --inc-phonon_dos  Extract .phonon_dos information
  -e, --inc-efield      Extract .efield information
  -x, --inc-xrd_sf      Extract .xrd_sf information
  -H, --inc-hug         Extract .hug information
  -E, --inc-elf_fmt     Extract .elf_fmt information
  -C, --inc-chdiff_fmt  Extract .chdiff_fmt information
  -P, --inc-pot_fmt     Extract .pot_fmt information
  -D, --inc-den_fmt     Extract .den_fmt information
  -X, --inc-elastic     Extract .elastic information
  -T, --inc-ts          Extract .ts information
  --inc-param           Extract .param information
  --inc-cell            Extract .cell information
  --castep [CASTEP ...]
                        Extract from CASTEP as .castep type
  --geom [GEOM ...]     Extract from GEOM as .geom type
  --cell [CELL ...]     Extract from CELL as .cell type
  --param [PARAM ...]   Extract from PARAM as .param type
  --md [MD ...]         Extract from MD as .md type
  --bands [BANDS ...]   Extract from BANDS as .bands type
  --hug [HUG ...]       Extract from HUG as .hug type
  --phonon_dos [PHONON_DOS ...]
                        Extract from PHONON_DOS as .phonon_dos type
  --efield [EFIELD ...]
                        Extract from EFIELD as .efield type
  --xrd_sf [XRD_SF ...]
                        Extract from XRD_SF as .xrd_sf type
  --elf_fmt [ELF_FMT ...]
                        Extract from ELF_FMT as .elf_fmt type
  --chdiff_fmt [CHDIFF_FMT ...]
                        Extract from CHDIFF_FMT as .chdiff_fmt type
  --pot_fmt [POT_FMT ...]
                        Extract from POT_FMT as .pot_fmt type
  --den_fmt [DEN_FMT ...]
                        Extract from DEN_FMT as .den_fmt type
  --elastic [ELASTIC ...]
                        Extract from ELASTIC as .elastic type
  --ts [TS ...]         Extract from TS as .ts type

Current Parsers:

• .castep

• .param

• .cell

• .geom

• .md

• .bands

• .hug

• .phonon_dos

• .efield

• .xrd_sf

• .elf_fmt

• .chdiff_fmt

• .pot_fmt

• .den_fmt

• .elastic

• .ts

Current dumpers:

• json

• ruamel.yaml

• pyyaml

• print

• pprint