code: def _find_bracket_position(self, text, bracket_left, bracket_right,
                                 pos_quote):
          
          pos = {}
          pstack = []
  
          for idx, character in enumerate(text):
              if character == bracket_left and \
                      not self.is_char_in_pairs(idx, pos_quote):
                  pstack.append(idx)
              elif character == bracket_right and \
                      not self.is_char_in_pairs(idx, pos_quote):
                  if len(pstack) == 0:
                      raise IndexError(
                          "No matching closing parens at: " + str(idx))
                  pos[pstack.pop()] = idx
  
          if len(pstack) > 0:
              raise IndexError(
                  "No matching opening parens at: " + str(pstack.pop()))
  
          return pos
docs: Return the start and end position of pairs of brackets.
  
          https://stackoverflow.com/questions/29991917/
          indices-of-matching-parentheses-in-python