def putmask(self, mask, value):
        values = self.values.copy()
        try:
            np.putmask(values, mask, self._convert_for_op(value))
            return self._shallow_copy(values)
        except (ValueError, TypeError):
            # coerces to object
            return self.astype(object).putmask(mask, value)
Returns the ``Content-Type`` header to be used for this request.
dataset/ETHPy150Open pydata/pandas/pandas/indexes/base.py/Index.putmask--crossover with--dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py/StaticFileHandler.get_content_type