Pandas :合并datetime索引中的日期和小时

import pandas as pd

# 创建一个包含日期和小时的datetime索引
index = pd.date_range('2022-01-01', periods=24, freq='H')

# 创建一个包含随机数据的Series
data = pd.Series(range(24), index=index)

# 合并日期和小时
data.index = data.index.strftime('%Y-%m-%d %H:%M:%S')

# 打印结果
print(data)

2022-01-01 00:00:00     0
2022-01-01 01:00:00     1
2022-01-01 02:00:00     2
2022-01-01 03:00:00     3
2022-01-01 04:00:00     4
2022-01-01 05:00:00     5
2022-01-01 06:00:00     6
2022-01-01 07:00:00     7
2022-01-01 08:00:00     8
2022-01-01 09:00:00     9
2022-01-01 10:00:00    10
2022-01-01 11:00:00    11
2022-01-01 12:00:00    12
2022-01-01 13:00:00    13
2022-01-01 14:00:00    14
2022-01-01 15:00:00    15
2022-01-01 16:00:00    16
2022-01-01 17:00:00    17
2022-01-01 18:00:00    18
2022-01-01 19:00:00    19
2022-01-01 20:00:00    20
2022-01-01 21:00:00    21
2022-01-01 22:00:00    22
2022-01-01 23:00:00    23
dtype: int64