solarterms.py

#!/usr/bin/env python3
# coding=utf-8

'''
整体思路
1：根据公式算出节气日期 1900 年到 2100  200 年的时间
2：特殊的年份进行纠正
'''
import sys
import json
import gc
import os

class jieqi:
    # 计算节气的C常量组
    C_list_21 = [3.87, 18.73, 5.63, 20.646, 4.81, 20.1, 5.52, 21.04, 5.678, 21.37, 7.108, 22.83, 7.5, 23.13, 7.646, 23.042, 8.318, 23.438, 7.438, 22.36, 7.18, 21.94, 5.4055, 20.12]

    C_list_20 = [4.6295, 19.4599, 6.3826, 21.4155, 5.59,20.888, 6.318, 21.86, 6.5, 22.2, 7.928, 23.65, 8.35,  23.95, 8.44, 23.822, 9.098, 24.218, 8.218, 23.08, 7.9, 22.6, 6.11, 20.84]

    # 节气名称组
    name_Arr = ["立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至", "小暑", "大暑", "立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪", "冬至", "小寒", "大寒"]

    def __init__(self):
        self.c_list=[]

    ## 特殊年份特殊节气进行纠正
    def rectify_year(self,year,jieqiid,day):
        ## 特殊年份
        rectify_year = [2026,2084,1911,2008,1902,1928,1925,2016,1922,2002,1927,1942,2089,2089,1978,1954,1918,2021,1982,2082,2019,2021]
        ## 特殊节气
        rectify_jieqi = [1,3,6,7,8,9,10,10,11,12,14,15,17,18,19,20,21,21,22,22,23]
        ## 偏移量
        rectify_offset = [-1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,-1,-1,1,-1,1]
        pop2 = -1
        if year in rectify_year:
            if year == 2089:
                pop1 = rectify_year.index(year) ## 找到位置
                pop2 = pop1+1
            else:
                pop1 = rectify_year.index(year) ## 找到位置

            if rectify_jieqi[pop1] == jieqiid:
                day = day + int(rectify_offset[pop1])
            if rectify_jieqi[pop2] == jieqiid:
                day = day + int(rectify_offset[pop2])
        return day

    #计算节气日期
    def get_year_jieqi(self,year):
        year_pre = year//100
        if year_pre == 19:
            C_arr = self.C_list_20
        elif year_pre == 20:
            C_arr = self.C_list_21

        year_num = year%100
        list_arr = []
        for i in range(0, 24):
            C = C_arr[i]
            ## 注意：凡闰年3月1日前闰年数要减一，即：L=[(Y-1)/4],因为小寒、大寒、立春、雨水这两个节气都小于3月1日,所以 y = y-1
            if i == 0 or i == 1 or i == 22 or i == 23:
                if self.comrun(year):
                    days = (year_num * 0.2422 + C) // 1 - ((year_num-1)// 4)
                else:
                    days = (year_num * 0.2422 + C) // 1 - (year_num // 4)
            else:
                days = (year_num * 0.2422 + C) // 1 - (year_num // 4)

            ## 特殊年份节气进行纠正
            days = self.rectify_year(year,i,days)

            days = int(days)
            days = '%02d' % days
            y = int(year_num // 1)
            m = i // 2 + 2
            if m == 13:
                m = 1
            m = '%02d' % m
            y = '%02d' % y
            strs = "{3}{0}-{1}-{2} 00:00:00".format(str(y), str(m), str(days),str(year_pre))
            item = dict(name=self.name_Arr[i], jieqiid=str(i + 1), time=strs)
            list_arr.append(item)
        return list_arr

    ## 算是否是闰年
    def comrun(self,year):
        i = 0
        if (year % 4) != 0 :
            i=0
        elif ((year % 100) == 0) & ((year % 400) != 0):
            i=0
        else:
            i=1
        return i