caseutil 0.5.2

Case conversion and verification Python library for snake_case, camelCase, kebab-case, and more.

caseutil

Case conversion and verification Python library for 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	func	example
Snake case	to_snake	my_variable_name
All caps, screaming snake	to_allcaps	MY_VARIABLE_NAME
Camel case	to_camel	myVariableName
Pascal case	to_pascal	MyVariableName
Kebab case, spinal case	to_kebab	my-variable-name
Lower space-separated	to_lower	my variable name
Upper space-separated	to_upper	MY VARIABLE NAME
Title space-separated	to_title	My Variable Name

Installation

$ pip install caseutil

Quick Start

Call is_* to verify case format, and to_* to convert to specific case:

>>> from caseutil import *
>>> is_snake('My variable-name')
False
>>> to_snake('My variable-name')
'my_variable_name'

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

$ caseutil -c allcaps "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.ALLCAPS, 'myVariableName')
'MY_VARIABLE_NAME'

All supported cases are gathered in Case enum:

class Case(StrEnum):
    ALLCAPS = 'allcaps'
    CAMEL = 'camel'
    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.

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🛠 Developer's Corner

Develop on Mac OS X

Requires Docker and Homebrew.

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

Testing:

task test

Plans

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