caseutil 0.6.1

Case convert and verify for Python: snake_case, camelCase, kebab-case, and more.

caseutil ⇄ 🐍🐫🍢

Case convert and verify for Python: snake_case, camelCase, kebab-case, and more.

Features

• Verify and convert between most popular cases
• Custom separators: 'my.variable.name', 'my/variable/name'
• Command line mode: caseutil
• Pure Python 2.7 to 3.13+
• No dependencies
• 100% test coverage

Supported Cases

Case	Example	Functions
snake_case	my_variable_name	is_snake, to_snake
CONST_CASE	MY_VARIABLE_NAME	is_const, to_const
camelCase	myVariableName	is_camel, to_camel
PascalCase	MyVariableName	is_pascal, to_pascal
kebab-case	my-variable-name	is_kebab, to_kebab
lower space	my variable name	is_lower, to_lower
UPPER SPACE	MY VARIABLE NAME	is_upper, to_upper
Title Space	My Variable Name	is_title, to_title

Installation

$ pip install caseutil

Quick Start

>>> from caseutil import *

Verify case format:

>>> is_snake('My variable-name')
False

Convert to case:

>>> to_snake('My variable-name')
'my_variable_name'

Use as command line tool, supports multiple values in argument or stdin:

$ caseutil -c const "hi there"
HI_THERE
$ echo "hi_there\nsee you" | python -m caseutil -c camel
hiThere
seeYou

Universal Functions

Use functions is_case() and to_case() to deal with arbitrary case:

>>> is_case('camel', 'myVariableName')
True
>>> to_case(Case.CONST, 'myVariableName')
'MY_VARIABLE_NAME'

All supported cases are gathered in Case enum:

class Case(StrEnum):
    CAMEL = 'camel'
    CONST = 'const'
    KEBAB = 'kebab'
    LOWER = 'lower'
    PASCAL = 'pascal'
    SNAKE = 'snake'
    TITLE = 'title'
    UPPER = 'upper'

Tokenization

Word separators are non-word characters including underscore, and places where text case is changed from lower to upper. Digits are not treated as separators. For more details, see this example and unit tests.

>>> words('!some_reallyMESsy text--wit4Digits.3VeryWh3re--')
['some', 'really', 'ME', 'Ssy', 'text', 'wit4', 'Digits', '3Very', 'Wh3re']

Custom Separators

For custom separators, use words() function:

>>> '/'.join(words(to_lower('myVariableName')))
'my/variable/name'
>>> '.'.join(words('myVariableName'))
'my.Variable.Name'

Unicode

Only ASCII names are supported. Unicode support is planned.

Developer Notes

Mac OS X

This project requires Homebrew. Other tools like PDM, Tox, and even Alacritty, will be installed automatically.

git clone https://github.com/makukha/caseutil.git
cd caseutil
brew bundle
task init install

Operations

Command	Description
task init	Initialize system environment
task install	Install Python environment
task test	Run tests
task version	Bump project version
task publish	Publish package on PyPi

Plans

• Add more test, explore edge cases
• Add Unicode support (write tests)
• Add more cases