---
id: pyhumps
version: "3.8.0"
license: The Unlicense (Unlicense)
license_treatment: permissive
maintenance: dormant
---

# pyhumps — 🐫  Convert strings (and dictionary keys) between snake case, camel case and pascal case in Python. Inspired by Humps for Node

License: permissive · Maintenance: dormant · Downloads: 7.1M/mo

## What it is and what it does

pyhumps is a lightweight string and dictionary-key case converter for Python. It transforms between snake_case, camelCase, PascalCase, and kebab-case, and provides checker functions to validate what case a string is already in. The package has no runtime dependencies and works across Python 3.6, 3.7, 3.8, 3.9, and 3.10 on both CPython and PyPy.

Typical use cases include normalizing API responses (e.g., converting camelCase JSON keys from external APIs into snake_case for Python code), preparing data for external services that expect a different naming convention, and validating or asserting the case of identifiers. The description includes a cookbook example of wrapping Boto3 to transparently convert between AWS API conventions and Pythonic naming.

Use it for:

- Normalize camelCase JSON responses from REST APIs into snake_case Python dictionaries for idiomatic code.
- Convert snake_case Python function arguments to camelCase before sending to external APIs or services.
- Validate that configuration keys or identifiers conform to an expected naming convention.
- Wrap third-party libraries to transparently convert between their naming conventions and yours.
- Handle acronyms and abbreviations correctly when converting between cases (e.g., APIResponse → api_response).

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Converts strings and dictionary keys between snake_case, camelCase, PascalCase, and kebab-case, plus functions to check what case a string is in.

Yes. pyhumps is a stable, zero-dependency utility with no known vulnerabilities, permissive licensing, and broad Python version support. It solves a common data-transformation problem cleanly. The dormant maintenance status is acceptable for a mature utility that does one thing well; however, if you need active support or expect breaking changes in future Python versions, flag this for periodic review.

## Install

pip install pyhumps
uv add pyhumps
poetry add pyhumps

## Installing pyhumps

Before you install: Low friction install with no runtime dependencies. Maintenance is dormant—last release was 2022-10-21 and last commit 2024-08-03—but the package remains available and stable.

License in practice: Licensed under The Unlicense (Unlicense), a permissive public-domain-equivalent license with no restrictions on use, modification, or distribution.

Quickstart:

pip install pyhumps

import pyhumps

pyhumps.camelize("jack_in_the_box")  # jackInTheBox
pyhumps.decamelize("rubyTuesdays")  # ruby_tuesdays
pyhumps.pascalize("red_robin")  # RedRobin
pyhumps.kebabize("white_castle")  # white-castle

Verify before relying:

- Whether the dormant maintenance status (last release 2022-10-21) poses a risk for future Python version compatibility or edge-case bug fixes.
- Support for Python versions beyond 3.10 given the last release date.

## Package facts

- License: The Unlicense (Unlicense) (permissive)
- Python support: unspecified
- Install friction: low
- Maintenance: dormant
- Downloads: 7.1M/month (top 5,000 on PyPI)
- Known vulnerabilities: none known

## Tags

string case conversion, snake case to camel case, dictionary key case conversion, camelcase pascalcase snake case, case checker validator, string naming convention, python case formatter, case-conversion, string-formatting, data-normalization

[View on SkillFed](https://skillfed.io/packages/pyhumps) · [View on PyPI](https://pypi.org/project/pyhumps/)