def _indent_line(self, line, stripspace=''):

        return re.sub(r"^%s" % stripspace, self.indentstring
                      * self.indent, line)
indent the given line according to the current indent level.
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/mako/pygen.py/PythonPrinter._indent_line