如何从pandas dataframe中提取日期/年/月？

import pandas as pd

# 创建一个示例的dataframe
df = pd.DataFrame({'date': ['2022-01-01', '2022-02-01', '2022-03-01']})

# 将日期列转换为datetime类型
df['date'] = pd.to_datetime(df['date'])

# 提取日期
df['day'] = df['date'].dt.date

# 提取年份
df['year'] = df['date'].dt.year

# 提取月份
df['month'] = df['date'].dt.month

# 打印结果
print(df)

        date         day  year  month
0 2022-01-01  2022-01-01  2022      1
1 2022-02-01  2022-02-01  2022      2
2 2022-03-01  2022-03-01  2022      3