Python计算当前日期是一年中的第几天的方法详解

import datetime

current_date = datetime.date.today()
print("当前日期:", current_date)

import datetime

current_date = datetime.date.today()

year = current_date.year
day_of_year = current_date.timetuple().tm_yday

print(f"当前日期：{current_date}")
print(f"{year}年的第{day_of_year}天")

import datetime
import calendar

current_date = datetime.date.today()

year = current_date.year
day_of_year = current_date.timetuple().tm_yday

if calendar.isleap(year):
    print(f"{year}年是闰年，第{day_of_year}天")
else:
    print(f"{year}年的第{day_of_year}天")

import datetime

# 创建一个自定义日期对象
custom_date = datetime.date(2023, 7, 15)

year = custom_date.year
day_of_year = custom_date.timetuple().tm_yday

print(f"自定义日期：{custom_date}")
print(f"{year}年的第{day_of_year}天")

import datetime

# 获取用户输入的日期
user_input = input("请输入日期（YYYY-MM-DD）：")

# 将用户输入的日期字符串解析为日期对象
try:
    custom_date = datetime.datetime.strptime(user_input, "%Y-%m-%d").date()
    year = custom_date.year
    day_of_year = custom_date.timetuple().tm_yday
    print(f"自定义日期：{custom_date}")
    print(f"{year}年的第{day_of_year}天")
except ValueError:
    print("无效的日期格式，请使用YYYY-MM-DD格式。")