python阳历转换成阴历的代码

"""
皮蛋编程(https://www.pidancode.com)
创建日期：2022/4/1
功能描述：python阳历转换成阴历的代码
"""


MONTH_NAME = ["", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]
MONTH_DAYS = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
LUNAR_CALENDAR_TABLE = [
    0x04AE53, 0x0A5748, 0x5526BD, 0x0D2650, 0x0D9544, 0x46AAB9, 0x056A4D, 0x09AD42, 0x24AEB6, 0x04AE4A,  # //*1901-1910*/
    0x6A4DBE, 0x0A4D52, 0x0D2546, 0x5D52BA, 0x0B544E, 0x0D6A43, 0x296D37, 0x095B4B, 0x749BC1, 0x049754,  # //*1911-1920*/
    0x0A4B48, 0x5B25BC, 0x06A550, 0x06D445, 0x4ADAB8, 0x02B64D, 0x095742, 0x2497B7, 0x04974A, 0x664B3E,  # //*1921-1930*/
    0x0D4A51, 0x0EA546, 0x56D4BA, 0x05AD4E, 0x02B644, 0x393738, 0x092E4B, 0x7C96BF, 0x0C9553, 0x0D4A48,  # //*1931-1940*/
    0x6DA53B, 0x0B554F, 0x056A45, 0x4AADB9, 0x025D4D, 0x092D42, 0x2C95B6, 0x0A954A, 0x7B4ABD, 0x06CA51,  # //*1941-1950*/
    0x0B5546, 0x555ABB, 0x04DA4E, 0x0A5B43, 0x352BB8, 0x052B4C, 0x8A953F, 0x0E9552, 0x06AA48, 0x6AD53C,  # //*1951-1960*/
    0x0AB54F, 0x04B645, 0x4A5739, 0x0A574D, 0x052642, 0x3E9335, 0x0D9549, 0x75AABE, 0x056A51, 0x096D46,  # //*1961-1970*/
    0x54AEBB, 0x04AD4F, 0x0A4D43, 0x4D26B7, 0x0D254B, 0x8D52BF, 0x0B5452, 0x0B6A47, 0x696D3C, 0x095B50,  # //*1971-1980*/
    0x049B45, 0x4A4BB9, 0x0A4B4D, 0xAB25C2, 0x06A554, 0x06D449, 0x6ADA3D, 0x0AB651, 0x093746, 0x5497BB,  # //*1981-1990*/
    0x04974F, 0x064B44, 0x36A537, 0x0EA54A, 0x86B2BF, 0x05AC53, 0x0AB647, 0x5936BC, 0x092E50, 0x0C9645,  # //*1991-2000*/
    0x4D4AB8, 0x0D4A4C, 0x0DA541, 0x25AAB6, 0x056A49, 0x7AADBD, 0x025D52, 0x092D47, 0x5C95BA, 0x0A954E,  # //*2001-2010*/
    0x0B4A43, 0x4B5537, 0x0AD54A, 0x955ABF, 0x04BA53, 0x0A5B48, 0x652BBC, 0x052B50, 0x0A9345, 0x474AB9,  # //*2011-2020*/
    0x06AA4C, 0x0AD541, 0x24DAB6, 0x04B64A, 0x69573D, 0x0A4E51, 0x0D2646, 0x5E933A, 0x0D534D, 0x05AA43,  # //*2021-2030*/
    0x36B537, 0x096D4B, 0xB4AEBF, 0x04AD53, 0x0A4D48, 0x6D25BC, 0x0D254F, 0x0D5244, 0x5DAA38, 0x0B5A4C,  # //*2031-2040*/
    0x056D41, 0x24ADB6, 0x049B4A, 0x7A4BBE, 0x0A4B51, 0x0AA546, 0x5B52BA, 0x06D24E, 0x0ADA42, 0x355B37,  # //*2041-2050*/
    0x09374B, 0x8497C1, 0x049753, 0x064B48, 0x66A53C, 0x0EA54F, 0x06B244, 0x4AB638, 0x0AAE4C, 0x092E42,  # //*2051-2060*/
    0x3C9735, 0x0C9649, 0x7D4ABD, 0x0D4A51, 0x0DA545, 0x55AABA, 0x056A4E, 0x0A6D43, 0x452EB7, 0x052D4B,  # //*2061-2070*/
    0x8A95BF, 0x0A9553, 0x0B4A47, 0x6B553B, 0x0AD54F, 0x055A45, 0x4A5D38, 0x0A5B4C, 0x052B42, 0x3A93B6,  # //*2071-2080*/
    0x069349, 0x7729BD, 0x06AA51, 0x0AD546, 0x54DABA, 0x04B64E, 0x0A5743, 0x452738, 0x0D264A, 0x8E933E,  # //*2081-2090*/
    0x0D5252, 0x0DAA47, 0x66B53B, 0x056D4F, 0x04AE45, 0x4A4EB9, 0x0A4D4C, 0x0D1541, 0x2D92B5  # //*2091-2099*/
]


# 下面的三个表格是农历数据表 LunarCalendarTable 的结构。总共使用了32位整数的0～23位。
#
# 6 5                4 3 2 1 0
# 表示春节的公历月份 表示春节的公历日期
#
# 19 18 17 16 15 14 13 12 11 10  9  8  7
# 1   2  3  4  5  6  7  8  9 10 11 12 13
# 农历1-13 月大小 。月份对应位为1，农历月大(30 天),为0 表示小(29 天)
#
# 23 22 21 20
# 表示当年闰月月份，值为0 为则表示当年无闰月。
def get_month_days(year, month):
    global MONTH_DAYS;
    if (month == 2):
        if (((year % 4 == 0) and (year % 100 != 0)) or (year % 400 == 0)):
            return 29
        else:
            return 28
    else:
        return (MONTH_DAYS[month]);


def get_syear_days(syear):
    if (((syear % 4 == 0) and (syear % 100 != 0)) or (syear % 400 == 0)):
        return 366
    else:
        return 365


def get_days_of_syear(syear, smonth, sday):
    """ get given day's number of sun year """
    days = 0
    for i in range(1, smonth):
        days += get_month_days(syear, i)
    days += sday
    return days


def get_days_of_lyear(syear, smonth, sday):
    """ get given day's number of the lunar year """
    global LUNAR_CALENDAR_TABLE
    lyear = syear
    spring_month = (LUNAR_CALENDAR_TABLE[syear - 1901] & 0x60) >> 5
    spring_day = (LUNAR_CALENDAR_TABLE[syear - 1901] & 0x1F)
    if ((spring_month > smonth) or ((spring_month == smonth) and (spring_day > sday))):
        # the day is before spring festival day, and is previous day in lunar year
        spring_month = (LUNAR_CALENDAR_TABLE[syear - 1901 - 1] & 0x60) >> 5
        spring_day = (LUNAR_CALENDAR_TABLE[syear - 1901 - 1] & 0x1F)
        lyear -= 1
        lunar_days = get_syear_days(lyear) + get_days_of_syear(syear, smonth, sday) \
                     - get_days_of_syear(lyear, spring_month, spring_day)
    else:
        lunar_days = get_days_of_syear(syear, smonth, sday) \
                     - get_days_of_syear(syear, spring_month, spring_day)
    lunar_days += 1  # consider current day
    return (lyear, lunar_days)


def get_lunar_date(syear, smonth, sday):
    if syear < 1901 or syear > 2099:
        return
    # lunar year, lunar days to spring festival
    lyear, lunar_days = get_days_of_lyear(syear, smonth, sday);
    l_double_month = (LUNAR_CALENDAR_TABLE[lyear - 1901] >> 20) & 0xF
    lmonth = lday = 1
    bits = 19
    month_begin_day = 0
    for lmonth in range(1, 14):
        l_month_big = (LUNAR_CALENDAR_TABLE[lyear - 1901] >> bits) & 0x1
        if month_begin_day + 29 + l_month_big < lunar_days:
            lmonth += 1
            month_begin_day += 29 + l_month_big
        else:
            lday = lunar_days - month_begin_day
            break
        bits -= 1
    if l_double_month:
        # lunar double month adjust
        if l_double_month == lmonth - 1:
            lmonth -= 1
            lmonth += 100  # double month
        elif l_double_month < lmonth - 1:
            lmonth -= 1
    return (lyear, lmonth, lday)


if __name__ == "__main__":
    y, m, d = 2010, 9, 28
    print("阳历 2010-9-28 == 阴历： ", get_lunar_date(y, m, d))