如何从固定时间中减去pandas datetime列？

import pandas as pd

# 创建一个示例DataFrame
df = pd.DataFrame({'datetime_column': ['2022-01-01 10:00:00', '2022-01-02 12:00:00', '2022-01-03 08:00:00']})

# 将datetime列转换为pandas的datetime类型
df['datetime_column'] = pd.to_datetime(df['datetime_column'])

# 创建一个时间差
time_diff = pd.Timedelta(days=1, hours=2)  # 减去1天2小时

# 从固定时间中减去时间差
df['result'] = df['datetime_column'] - time_diff

# 打印结果
print(df)

      datetime_column              result
0 2022-01-01 10:00:00 2021-12-31 07:00:00
1 2022-01-02 12:00:00 2022-01-01 09:00:00
2 2022-01-03 08:00:00 2022-01-02 05:00:00