---
title: Kebabcase string
type: snippet
language: python
tags: [string,regexp]
cover: peaches
dateModified: 2020-11-02T19:28:05+02:00
---

Converts a string to kebab case.

- Use `re.sub()` to replace any `-` or `_` with a space, using the regexp `r"(_|-)+"`.
- Use `re.sub()` to match all words in the string, `str.lower()` to lowercase them.
- Finally, use `str.join()` to combine all word using `-` as the separator.

```py
from re import sub

def kebab(s):
  return '-'.join(
    sub(r"(\s|_|-)+"," ",
    sub(r"[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+",
    lambda mo: ' ' + mo.group(0).lower(), s)).split())
```

```py
kebab('camelCase') # 'camel-case'
kebab('some text') # 'some-text'
kebab('some-mixed_string With spaces_underscores-and-hyphens')
# 'some-mixed-string-with-spaces-underscores-and-hyphens'
kebab('AllThe-small Things') # 'all-the-small-things'
```