<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _indent(self, textstr, indent_level=4):
 """ Indent a string. Textwrap's indent method only exists for 3.3 or above. In 2.7 we have to fake it. Parameters textstring : str String to be indented. indent_level : str Number of spaces of indentation to add. Returns ------- str Possibly multi-line string indented by the specified amount. """

        if sys.hexversion >= 0x03030000:
            return textwrap.indent(textstr, ' ' * indent_level)
        else:
            lst = [(' ' * indent_level + x) for x in textstr.split('\n')]
            return '\n'.join(lst)