caseutil 0.6.0

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 name	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's Corner

On Mac OS X

Requires Docker and Homebrew.

git clone https://github.com/makukha/caseutil.git
brew install go-task
task init

Testing

Tox for all supported Python versions and coverage included.

task test

Plans

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