SublimeText 2 CamelCase to SnakeCase Converter

Default.sublime-commands

[
    {
        "caption": "Snake Case: Convert CamelCase to snake_case",
        "command": "snake_case"
    }
]

SnakeCase.py

import sublime, sublime_plugin, unicodedata, re, string

def add_underscores(s):
	return re.sub('([A-Z]+)', '_\\1', s)

class SnakeCaseCommand(sublime_plugin.TextCommand):

	def run(self, edit):
		for region in self.view.sel():
			content = self.view.substr(region)
			self.view.replace(edit, region, add_underscores(content).lower())