ruamel.yaml.string

version:

0.1.1

updated:

2023-05-02

This plug-in adds a method dump_to_string (and its equivalent dumps) to the ruamel.yaml.YAML instance that returns the document as a Python string.

Installation

The module can be installed from PyPI using:

pip install ruamel.yaml.string

This module is dependent on ruamel.yaml, so you do not have to explicitly make your module depending on both.

Usage

import ruamel.yaml

yaml = ruamel.yaml.YAML(typ=['rt', 'string'])
data  = dict(abc=42, help=['on', 'its', 'way'])
print('retval', yaml.dump_to_string(data))
print('>>>> done')

which gives:

retval abc: 42
help:
- on
- its
- way
>>>> done

Please note that there is no final newline added to the string that is returned. That the >>>> done is on the next line is caused by the print() function adding a newline by default. (This is different from using PyYAML’s dump, as e.g. the output of various print dump(data) examples in the documentation (2021) fail to clearly show the double newline at the end of the examples output. It is similar to json.dumps(data, indent=2) that returns a string without final newline.)

Alternatively the first call to print could be:

print('retval', yaml.dump_to_string(data, add_final_eol=True), end='')

with the same effect.

.dump_to_string() can be shortened to .dumps()

Directly writing to ``sys.stdout`` using ``yaml.dump(data, sys.stdout)`` is much more efficient than ``print``-ing the result of ``yaml.dumps(data)``

ChangeLog

0.1.1 (2023-05-02):

• typing added and readme corrections

0.1.0 (2022-03-17):

• initial plug-in version