从周数和日计算出日历日(42.1)

import datetime

def week_day_to_calendar_date(year, week_number, day_of_week):
    # 计算周的第一天
    first_day_of_week = datetime.datetime.strptime(f'{year}-W{week_number - 1}-1', "%Y-W%W-%w").date()
    # 计算目标日期
    target_date = first_day_of_week + datetime.timedelta(days=day_of_week - 1)
    return target_date

# 示例：2023年第42周的第1天
year = 2023
week_number = 42
day_of_week = 1
calendar_date = week_day_to_calendar_date(year, week_number, day_of_week)
print(calendar_date)  # 输出: 2023-10-16