oyaml
Ordered YAML: drop-in replacement for PyYAML which preserves dict ordering
Decision gist · record as of 2026-08-14
Yes-with-conditions. Install if you need ordered YAML output and cannot rely on standard PyYAML. Be aware the package is unmaintained since 2020-08-18 and may not work reliably with recent PyYAML releases. If you can use modern Python versions where dict ordering is guaranteed, standard PyYAML may suffice.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Installation is straightforward with low friction—a pure-Python wheel with a single runtime dependency on pyyaml.
- However, the package is dormant: the latest release was 2020-08-18, and no commits have landed since 2024-11-05, so it receives no active maintenance.
License · maintenance · safety
MIT (permissive) — MIT is a permissive license with minimal restrictions, allowing commercial and private use without obligation to share modifications.
last release 2020-08-18 (2187 days) · last repo commit 2024-11-05 · 185 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 2,703,010 downloads/mo, #2,934 on PyPI
Alternatives
Verify before relying
pip install oyaml
import oyaml as yaml
data = yaml.safe_load(open('config.yaml'))
yaml.safe_dump(data)- Whether dict ordering preservation is still necessary given Python 3.7+ guarantees insertion order for built-in dicts
- Compatibility with recent PyYAML versions and modern Python releases beyond what the fact sheet specifies
What it is and what it does
oyaml wraps PyYAML to preserve the order of keys in dictionaries during YAML serialization and deserialization. In scenarios where standard PyYAML could scramble dictionary key order, oyaml maintains insertion order throughout the round-trip. You import it as a drop-in replacement (import oyaml as yaml) and use it identically to PyYAML.
The package depends only on pyyaml and installs as a pure-Python wheel, making setup trivial. It is dormant—last released in 2020-08-18 with no recent commits—so it receives no active development or bug fixes. This matters most if you rely on it with newer PyYAML versions or encounter edge cases that require upstream fixes.
Use it for
- Preserving YAML key order in configuration files where the sequence of settings matters for readability
- Round-tripping YAML data structures without losing the original key ordering
- Ensuring consistent, predictable YAML dumps for version control or diff-friendly configuration management
- Legacy codebases that need ordered YAML output before dict ordering became standard
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes-with-conditions.
Install if you need ordered YAML output and cannot rely on standard PyYAML. Be aware the package is unmaintained since 2020-08-18 and may not work reliably with recent PyYAML releases. If you can use modern Python versions where dict ordering is guaranteed, standard PyYAML may suffice.
Install
oyaml on PyPI
Before you install
Installation is straightforward with low friction—a pure-Python wheel with a single runtime dependency on pyyaml. However, the package is dormant: the latest release was 2020-08-18, and no commits have landed since 2024-11-05, so it receives no active maintenance.
License in practice
MIT is a permissive license with minimal restrictions, allowing commercial and private use without obligation to share modifications.
Quickstart
pip install oyaml
import oyaml as yaml
data = yaml.safe_load(open('config.yaml'))
yaml.safe_dump(data)Verify before relying
- Whether dict ordering preservation is still necessary given Python 3.7+ guarantees insertion order for built-in dicts
- Compatibility with recent PyYAML versions and modern Python releases beyond what the fact sheet specifies
Package facts
| License | MIT permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagepyyaml |
| Maintenance | Dormant 2,187 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 2,703,010 / month, #2,934 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
Evidence: oyaml-1.0-py2.py3-none-any.whl
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