code: def _split_out_of_braces(s):
      
      prev = 0
      for m in re.finditer(r"{[^{}]*}|\s*,\s*", s):
          if not m.group().startswith("{"):
              part = s[prev:m.start()]
              if part:
                  yield s[prev:m.start()]
              prev = m.end()
      part = s[prev:]
      if part:
          yield part
docs: Generator to split comma seperated string, but not split commas inside
      curly braces.
  
      >>> list(_split_out_of_braces("py{26, 27}-django{15, 16}, py32"))
      >>>['py{26, 27}-django{15, 16}, py32']