Return the start and end position of pairs of brackets.

        https://stackoverflow.com/questions/29991917/
        indices-of-matching-parentheses-in-python

def _find_bracket_position(self, text, bracket_left, bracket_right,
                               pos_quote):
        """Return the start and end position of pairs of brackets.

        https://stackoverflow.com/questions/29991917/
        indices-of-matching-parentheses-in-python
        """
        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