hifiyaml 0.1.2

High-fidelity YAML parser that preserves formatting

hifiyaml

High-fidelity YAML parser that preserves formatting.
Original YAML structure and formatting are preserved, including comments, anchors, aliases, etc.

Installation

pip install hifiyaml

Quick demo

1. get an example YAML file

Use jedivar.yaml from the RRFSv2 system as an example.

wget https://raw.githubusercontent.com/NOAA-EMC/rrfs-workflow/refs/heads/rrfs-mpas-jedi/parm/jedivar.yaml

2. load the YAML data and dump a YAML block using a querystr

Write the following statments into test.py:

import hifiyaml as hy
data = hy.load("jedivar.yaml")
querystr = "cost function/background error/components/1"
hy.dump(data, querystr)   # dump to stdout
hy.dump(data, querystr, 'ensbec.yaml')   # dump to a file

run python test.py, check the stdout and the ensbec.yaml file.

NOTE: A querystr is a string describing the path from the top level key (or index if a list) to the destination level key (or index), separated with /.
For the following simple YAML file,

demo:
  configuration:
    suite: YAML
    detail:
      - meaning:
          - Y: Yelling
          - A: At
          - M: My
          - L: Laptop

A query string demo/configuration/detail/0/meaning will return one dictionary item with "meaning" as the key and a list of 4 items as the value, i.e:

- meaning:
    - Y: Yelling
    - A: At
    - M: My
    - L: Laptop

3. More is coming soon.

hifiyaml currently provides the following functions:

load, get, dump, drop, modify, next_pos, get_start_pos, text_to_yblock, strip_indentations, strip_leading_empty_lines

More information will be added soon.