ruamel.yaml is a YAML parser and emitter for Python that supports round-trip preservation of comments, sequence and mapping flow styles, and map key order. The current version is 0.19.1, released on March 28, 2026. It is actively maintained with regular updates.
pip install ruamel.yamlVerified import paths — ran on the pinned version, not inferred.
A basic example demonstrating how to load, modify, and save YAML data using ruamel.yaml.
Open the file using 'with open()' before passing it to 'load'.
Always import 'ruamel.yaml' as 'YAML' to access the 'YAML' class.
Ensure the YAML file exists at the correct path relative to the script's execution directory, or verify that the 'YAML_FILE_PATH' environment variable is set to a valid, existing file path.
Create the 'data.yaml' file in the expected location or verify the value of the 'YAML_FILE_PATH' environment variable to ensure it points to an existing YAML file.
Instantiate a `YAML` object and then use its `load()` method:
```python
from ruamel.yaml import YAML
yaml = YAML()
with open('your_file.yaml') as f:
data = yaml.load(f)
```Open the file first and pass the file object to the `load()` or `dump()` method:
```python
from ruamel.yaml import YAML
yaml = YAML()
with open('config.yaml', 'r') as f:
data = yaml.load(f)
```Review the YAML file for syntax errors, paying close attention to indentation, key-value pair formatting, and proper use of lists and dictionaries.
Inspect the YAML file for invalid characters, ensure proper escaping of special characters, and correct any malformed strings or flow collection syntax.
No dependency data recorded yet.