Python - 如何从日期时间对象中去除时区信息

str在列上使用 Pandas 字符串切片（因为数据类型是object根据 OP）：

df['ColB (New datetime)'] = df['ColA (Localized datetime)'].str[:-6]

或者：

df['ColB (New datetime)'] = df['ColA (Localized datetime)'].str.slice(start=0,stop=19)

print(df)

   ColA (Localized datetime)  ColB (New datetime)
0  2016-09-19 00:29:13-05:00  2016-09-19 00:29:13
1  2016-09-19 04:16:04-02:00  2016-09-19 04:16:04
2  2016-09-19 06:57:54+01:00  2016-09-19 06:57:54

编辑：由于之前的SO 解决方案输出Timestamp在整个列中的格式不一致，虽然数据类型是object但每个值是Timestamp：

df['ColB (New datetime)'] = df['ColA (Localized datetime)'].apply(lambda x: x.replace(tzinfo=None))