dynamic-yaml
Enables self referential yaml entries
Decision gist · record as of 2026-08-14
Yes, if you need lightweight configuration templating in YAML. The package is simple, has minimal dependencies, and solves a real problem—avoiding repetition in configuration files. However, maintenance is dormant (last update 2024-04-09), so adopt it only if you can tolerate no active support. The MIT license carries no restrictions. Not suitable if you need active bug fixes or features.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires pyyaml to be installed; strings containing braces must be quoted in YAML to distinguish them from mapping syntax.
- Low install friction with a single runtime dependency (pyyaml).
- Maintenance is dormant—last release was 2024-04-09 with no recent commits, though the repository remains active and has not been archived.
License · maintenance · safety
permissive license (permissive) — MIT License permits unrestricted use, modification, and distribution for both commercial and private projects, with only attribution and license notice required.
last release 2024-04-09 (857 days) · last repo commit 2024-04-09 · 45 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 576,509 downloads/mo, #5,929 on PyPI
Alternatives
Verify before relying
import dynamic_yaml
with open('config.yaml') as f:
cfg = dynamic_yaml.load(f)
print(cfg.dirs.venv) # Resolves interpolated references- Whether the package handles circular reference detection or will hang on cyclic interpolations.
- Performance characteristics when resolving deeply nested or large configuration trees.
- Compatibility with recent pyyaml versions and Python 3.12+.
What it is and what it does
Dynamic YAML extends PyYAML to support self-referential configuration values. Instead of repeating paths or values throughout a YAML file, you can use Python format string syntax (curly braces) to reference other keys in the configuration tree—for example, `{dirs.home}/venvs/{project_name}` will resolve to the actual values of those keys. This turns static YAML into a lightweight templating system suitable for managing complex configuration hierarchies.
The package works by wrapping PyYAML's loader and providing a `load()` function that returns an object with attribute access to configuration keys. References are resolved dynamically when accessed, and you can also dump the resolved configuration back to YAML. It integrates naturally with tools like argparse, allowing command-line arguments to override configuration values that other parts of the config depend on.
Use it for
- Build configuration files where paths are defined once at the root and reused throughout nested sections.
- Generate environment-specific configs (dev, staging, prod) by changing a few base values and letting references propagate.
- Combine with argparse to override base parameters and have dependent paths update automatically.
- Export resolved configurations to YAML for deployment or documentation without manual path expansion.
- Reduce duplication in large configuration files by centralizing repeated values as references.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need lightweight configuration templating in YAML.
The package is simple, has minimal dependencies, and solves a real problem—avoiding repetition in configuration files. However, maintenance is dormant (last update 2024-04-09), so adopt it only if you can tolerate no active support. The MIT license carries no restrictions. Not suitable if you need active bug fixes or features.
Install
dynamic-yaml on PyPI
Before you install
Low install friction with a single runtime dependency (pyyaml). Maintenance is dormant—last release was 2024-04-09 with no recent commits, though the repository remains active and has not been archived.
Requires pyyaml to be installed; strings containing braces must be quoted in YAML to distinguish them from mapping syntax.
License in practice
MIT License permits unrestricted use, modification, and distribution for both commercial and private projects, with only attribution and license notice required.
Quickstart
import dynamic_yaml
with open('config.yaml') as f:
cfg = dynamic_yaml.load(f)
print(cfg.dirs.venv) # Resolves interpolated referencesVerify before relying
- Whether the package handles circular reference detection or will hang on cyclic interpolations.
- Performance characteristics when resolving deeply nested or large configuration trees.
- Compatibility with recent pyyaml versions and Python 3.12+.
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.0 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagepyyaml |
| Maintenance | Dormant 857 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 576,509 / month, #5,929 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: MIT LicenseProgramming Language :: PythonProgramming Language :: Python :: 3 |
Evidence: dynamic_yaml-2.0.0-py3-none-any.whl
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