python Pandas : Convert 2 fields Date + Time to 1 Datetime field

Question

在 Pandas 数据框中有 2 列:

"CREATED ON DATE" (dtype: datetime64[ns]) e.g. 2019-06-16
"CREATED AT TIME" (dtype: object) e.g. 19:46:14

由于类型不匹配，简单地添加字段是行不通的。

df["CREATED DATETIME"] = df["CREATED ON DATE"] + df["CREATED AT TIME"]

如何将这两列合并为 1 个日期时间字段“CREATED DATETIME”？

Answer 1

使用to_timedelta :

df["CREATED DATETIME"] = df["CREATED ON DATE"] + pd.to_timedelta(df["CREATED AT TIME"])

如果列中的对象是 python times，则将其转换为 string 之前:

df["CREATED DATETIME"] = (df["CREATED ON DATE"] + 
                          pd.to_timedelta(df["CREATED AT TIME"].astype(str)))