将多个字符列转换为日期时间，然后执行行均值

import pandas as pd
from datetime import datetime

# 假设有一个包含字符列的数据表df
df = pd.DataFrame({'date': ['2022-01-01', '2022-01-02', '2022-01-03'],
                   'time': ['12:00:00', '13:30:00', '15:45:00'],
                   'value1': [10, 20, 30],
                   'value2': [5, 15, 25]})

# 将字符列转换为日期时间类型
df['datetime'] = pd.to_datetime(df['date'] + ' ' + df['time'])

# 计算行均值
df['row_mean'] = df[['value1', 'value2']].mean(axis=1)

# 打印结果
print(df)

         date      time  value1  value2            datetime  row_mean
0  2022-01-01  12:00:00      10       5 2022-01-01 12:00:00       7.5
1  2022-01-02  13:30:00      20      15 2022-01-02 13:30:00      17.5
2  2022-01-03  15:45:00      30      25 2022-01-03 15:45:00      27.5