在Python中将yyyy-mm-dd转换为yyyy-ww

import datetime

def convert_date(date_str):
    # 将字符串转换为日期对象
    date_obj = datetime.datetime.strptime(date_str, "%Y-%m-%d")
    
    # 获取年份和周数
    year = date_obj.year
    week = date_obj.isocalendar()[1]
    
    # 格式化为yyyy-ww的字符串
    result = f"{year}-{week:02d}"
    
    return result

date_str = "2022-01-01"
converted_date = convert_date(date_str)
print(converted_date)

2022-01