# File lib/cucumber/parser/feature.rb, line 1625
      def _nt_open_py_string
        start_index = index
        if node_cache[:open_py_string].has_key?(index)
          cached = node_cache[:open_py_string][index]
          @index = cached.interval.end if cached
          return cached
        end

        i0, s0 = index, []
        s1, i1 = [], index
        loop do
          r2 = _nt_space
          if r2
            s1 << r2
          else
            break
          end
        end
        r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
        s0 << r1
        if r1
          if has_terminal?('"""', false, index)
            r3 = instantiate_node(SyntaxNode,input, index...(index + 3))
            @index += 3
          else
            terminal_parse_failure('"""')
            r3 = nil
          end
          s0 << r3
          if r3
            s4, i4 = [], index
            loop do
              r5 = _nt_space
              if r5
                s4 << r5
              else
                break
              end
            end
            r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
            s0 << r4
            if r4
              r6 = _nt_eol
              s0 << r6
            end
          end
        end
        if s0.last
          r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
          r0.extend(OpenPyString0)
          r0.extend(OpenPyString1)
        else
          @index = i0
          r0 = nil
        end

        node_cache[:open_py_string][start_index] = r0

        r0
      end