ruamel_yaml_clib_quickstart_load_modify_dump.py

1import sys
2from ruamel.yaml import YAML
3
4# The 'typ="safe"' or 'typ="rt"' (round-trip) with pure=False 
5# ensures that the C-based clib is used for performance.
6yaml = YAML(typ='safe')
7
8# Example YAML data
9yaml_data = """
10- name: Quickstart
11  package: ruamel.yaml.clib
12  status: optimized
13  tasks:
14    - install
15    - import
16    - parse
17"""
18
19# Load the data using the C-based parser
20data = yaml.load(yaml_data)
21
22# Modify data
23data[0]['status'] = 'running with C speed'
24
25# Dump the data back to stdout using the C-based emitter
26yaml.dump(data, sys.stdout)