parameters: (line)
return_statement: return index
docstring: get indent length
      :param line:
      :return:
docstring_summary: get indent length
      :param line:
      :return:
docstring_tokens: get indent length : param line : : return :
function: def get_indent(line):
      """
      get indent length
      :param line:
      :return:
      """
      index = 0
      for i in line:
          if i == " ":
              index += 1
          else:
              break
      return index
function_tokens: def get_indent ( line ) : index = 0 for i in line : if i == " " : index += 1 else : break return index