30-seconds-of-code/snippets/snake.md

title, tags

title	tags
snake	string,regexp,intermediate

Converts a string to snake case.

Break the string into words and combine them adding underscore _ as a separator, using a regexp.

import re

def snake(str):
    return '_'.join(re.sub('([A-Z][a-z]+)', r' \1',
                    re.sub('([A-Z]+)', r' \1', str)).split()).lower()

snake('camelCase'); # 'camel_case'
snake('some text'); # 'some_text'
snake('some-mixed_string With spaces_underscores-and-hyphens'); # 'some_mixed_string_with_spaces_underscores_and_hyphens'
snake('AllThe-small Things'); # "all_the_smal_things"