32 lines
829 B
Markdown
32 lines
829 B
Markdown
---
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title: Snakecase string
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tags: string,regexp
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expertise: intermediate
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firstSeen: 2019-08-21T08:59:54+03:00
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lastUpdated: 2020-11-02T19:28:35+02:00
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---
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Converts a string to snake case.
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- Use `re.sub()` to match all words in the string, `str.lower()` to lowercase them.
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- Use `re.sub()` to replace any `-` characters with spaces.
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- Finally, use `str.join()` to combine all words using `-` as the separator.
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```py
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from re import sub
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def snake(s):
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return '_'.join(
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sub('([A-Z][a-z]+)', r' \1',
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sub('([A-Z]+)', r' \1',
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s.replace('-', ' '))).split()).lower()
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```
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```py
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snake('camelCase') # 'camel_case'
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snake('some text') # 'some_text'
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snake('some-mixed_string With spaces_underscores-and-hyphens')
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# 'some_mixed_string_with_spaces_underscores_and_hyphens'
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snake('AllThe-small Things') # 'all_the_small_things'
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```
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