转换前dtype

Date          object
Open         float64
High         float64
Low          float64
Close        float64
Volume         int64
Adj Close    float64
dtype: object

执行

pd.to_datetime(Date)

转换后dtype

Date         datetime64[ns]
Open                float64
High                float64
Low                 float64
Close               float64
Volume                int64
Adj Close           float64
dtype: object