如何将dataframe中的字符串更改为日期时间值？

import pandas as pd
from datetime import datetime

data = {'date': ['2022-01-01', '2022-02-01', '2022-03-01'],
        'value': [10, 20, 30]}
df = pd.DataFrame(data)

df['date'] = pd.to_datetime(df['date'])

print(df.dtypes)

date     datetime64[ns]
value             int64
dtype: object