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Convert camel-case to snake-case in python.
#!/usr/bin/env python
"""
Convert camel-case to snake-case in python.
e.g.: CamelCase -> snake_case
Relevant StackOverflow question: http://stackoverflow.com/a/1176023/293064
"""
__author__ = 'Jay Taylor [@jtaylor]'
import re
_underscorer1 = re.compile(r'(.)([A-Z][a-z]+)')
_underscorer2 = re.compile('([a-z0-9])([A-Z])')
def camelToSnake(s):
"""
Is it ironic that this function is written in camel case, yet it
converts to snake case? hmm..
"""
subbed = _underscorer1.sub(r'\1_\2', s)
return _underscorer2.sub(r'\1_\2', subbed).lower()
if __name__ == '__main__':
assert camelToSnake('snakesOnAPlane') == 'snakes_on_a_plane'
assert camelToSnake('SnakesOnAPlane') == 'snakes_on_a_plane'
assert camelToSnake('snakes_on_a_plane') == 'snakes_on_a_plane'
assert camelToSnake('IPhoneHysteria') == 'i_phone_hysteria'
assert camelToSnake('iPhoneHysteria') == 'i_phone_hysteria'
print 'All tests passed.'
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