def normalize(self):
        new_values = tslib.date_normalize(self.asi8, self.tz)
        return DatetimeIndex(new_values, freq='infer', name=self.name,
                             tz=self.tz)
Return DatetimeIndex with times to midnight. Length is unaltered
dataset/ETHPy150Open pydata/pandas/pandas/tseries/index.py/DatetimeIndex.normalize