Python / Pandas - Datetime统计数据。如何聚合datetime列的平均值

import pandas as pd

data = {'datetime': ['2022-01-01 10:00:00', '2022-01-01 12:00:00', '2022-01-02 08:00:00', '2022-01-02 10:00:00']}
df = pd.DataFrame(data)
df['datetime'] = pd.to_datetime(df['datetime'])

df.set_index('datetime', inplace=True)

resampled_df = df.resample('D').mean()

print(resampled_df)