docs: def parse_python_syntax(text):
      """
      step1: split lines
  
      step2: parse enclosure pairity for each line to find unended lines
  
      for each unending line, is there a valid merge line?
      (a line that could snytatically finish this runnon statement?
      If no then error. Else try to join the two lines.
  
      step3: perform context_sensitive_edit
  
      Example:
          >>> # DISABLE_DOCTEST
          >>> from utool.util_regex import *   # NOQA
          >>> import utool
          >>> from os.path import normpath
          >>> text = utool.read_from(utool.util_regex.__file__)
      """
      import utool as ut
      def find_all(a_str, sub):
          start = 0
          while True:
              start = a_str.find(sub, start)
              if start == -1:
                  return
              yield start
              start += len(sub)  # use start += 1 to find overlapping matches
      line_list_ = [line + '\n' for line in text.splitlines()]  # NOQA
      import re  # NOQA
      line_list = [line[0:line.find('#')] for line in line_list_]
      open_tokens  = ['\'\'\'', '"""', '\'', '"', '(', '[']   # ,  '#']
      close_tokens = ['\'\'\'', '"""', '\'', '"', ')', ']']   # , '\n']
      def find_token_pos(line, token):
          return list(find_all(line, token))
      open_tokenxs  = [[find_token_pos(line, token) for line in line_list] for token in open_tokens]
      close_tokenxs = [[find_token_pos(line, token) for line in line_list] for token in close_tokens]
      print(open_tokenxs)
      print(close_tokenxs)
      print(sum(ut.flatten(ut.flatten(open_tokenxs))))
      print(sum(ut.flatten(ut.flatten(close_tokenxs))))