python实现日期与天数的转换

import sys

# 日期处理-日期转换为天数，根据某年过去的天数获取具体的日期
class DateHandle:
    def __init__(self) -> None:
        self.mp = {1:31, 3:31, 5:31, 7:31, 8:31, 10:31, 12:31, 4:30, 6:30, 9:30, 11:30, 2:28}  
    # 闰年判断
    def check(self, year):
        if year % 400 == 0 or (year % 4 == 0 and year % 100 != 0):
            return True
        return False
    # 获取月份对应的天数
    def init(self, year):
        if self.check(year): # 瑞年
            self.mp[2] = 29   
    # 根据年月日获取对应的天数
    def getDays(self, year, month, day):
        cnt = 0
        for m in range(1, month):
            cnt += self.mp[m]
        cnt += day
        return cnt
    # 根据某年的天数获取年月日
    def getDate(self, year, days):
        cnt, month = 0, 1
        for i in range(1, 13):
            month = i
            if cnt + self.mp[i] <= days:
                cnt += self.mp[i]
            else:
                break    
        date = days - cnt 
        return "%d %d %d" % (year, month, date)  

year, month, day = 2025, 6, 6
d = DateHandle()
d.init(year)
cnt  = d.getDays(year, month, day)
date = d.getDate(year, cnt)
print('year: %d, month: %d, day: %d , days is %d' % (year, month, day, cnt))  
print('year is %d, days is %d, conver to date is %s' % (year, cnt, date))   

##------------------------output--------------------##
#	year: 2025, month: 6, day: 6 , days is 157
# 	year is 2025, days is 157, conver to date is 2025 6 6
##------------------------over----------------------##