code: def execute_interactive_code(elem, doc):
      
      code_lines = [l[4:] for l in elem.text.split('\n')]
  
      code_blocks = [[code_lines[0]]]
      for line in code_lines[1:]:
          if line.startswith(' ') or line == '':
              code_blocks[-1].append(line)
          else:
              code_blocks.append([line])
  
      final_code = []
      try:
          child = replwrap.REPLWrapper("python", ">>> ", None)
      except NameError:
          pf.debug('Can not run interactive session. No output produced ' +
                   '(Code was:\n{!s}\n)'
                   .format(elem))
          pf.debug('Please pip install pexpect.')
          return ''
      for code_block in code_blocks:
          result = child.run_command('\n'.join(code_block) + '\n').rstrip('\r\n')
          final_code += [('>>> ' if i == 0 else '... ') + l for i, l in
                         enumerate(code_block)]
          if result:
              final_code += [r for r in result.split('\n')
                             if r.strip() not in code_block]
      return '\n'.join(final_code)
docs: Executes code blocks for a python shell.
  
      Parses the code in `elem.text` into blocks and
      executes them.
  
      Args:
          elem The AST element.
          doc  The document.
  
      Return:
          The code with inline results.