一：利用年份公式推算12生肖，以及用if-else编写12星座和24节气。
1、PyQt设计界面：
2、对象命名：
3、源程序：
在这里插入代码片# 系统包
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
# 项目包
from Ui_MainWindow import Ui_MainWindow
class CMainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, parent = None):
super(CMainWindow, self).__init__(parent)
self.setupUi(self)
# 主窗体设置
self.show()
def Sure(self):
nian = int(self.txtNumber1.text())
yue = self.txtNumber2.text()
ri = self.txtNumber3.text()
Months = self.txtNumber4.text()
Day = self.txtNumber5.text()
l = nian%12+1
if l == 5:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是鼠年。"
if l == 6:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是牛年。"
if l == 7:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是虎年。"
if l == 8:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是兔年。"
if l == 9:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是龙年。"
if l == 10:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是蛇年。"
if l == 11:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是马年。"
if l == 12:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是羊年。"
if l == 1:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是猴年。"
if l == 2:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是鸡年。"
if l == 3:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是狗年。"
if l == 4:
strOutnian =str(nian) + "年" + str(yue) + "月" + str(ri) + "日，今年是猪年。"
self.labResult.setText(strOutnian)
a = int(yue + ri)
print(a)
if a==101:
strOutyueri = "今天是元旦节，我的星座是摩羯座"
elif a <= 218 and a >= 120:
strOutyueri = "我的星座是水瓶座"
elif a <= 320 and a >= 219:
strOutyueri = "我的星座是双鱼座"
elif a ==401:
strOutyueri = "今天是愚人节，我的星座是白羊座"
elif a <= 419 and a >= 321:
strOutyueri = "我的星座是白羊座"
elif a ==501:
strOutyueri = "今天是劳动节，我的星座是金牛座"
elif a <= 520 and a > 420:
strOutyueri = "我的星座是金牛座"
elif a==601:
strOutyueri ="我的星座是双子座，今天是儿童节"
elif a <= 621 and a >= 521:
strOutyueri = "我的星座是双子座"
elif a <= 722 and a >= 622:
strOutyueri = "我的星座是巨蟹座"
elif a <= 822 and a >= 723:
strOutyueri = "我的星座是狮子座"
elif a <= 922 and a >= 823:
strOutyueri = "我的星座是处女座"
elif a ==1001:
strOutyueri ="今天是国庆节，我的星座是天秤座"
elif a <= 1023 and a >= 923:
strOutyueri = "我的星座是天秤座"
elif a <= 1122 and a >= 1024:
strOutyueri = "我的星座是天蝎座"
elif a==1213:
strOutyueri ="今天是国家公祭日，我的星座是射手座"
elif a <= 1221 and a >= 1123:
strOutyueri = "我的星座是射手座"
else :
strOutyueri = "我的星座是摩羯座"
self.labResult.setText( self.labResult.text() + strOutyueri )
b = int(Months + Day)
print(b)
if b <= 205 and b >= 203:
strOutMonthsDay = "节气为春分"
elif b <= 220 and b >= 218:
strOutMonthsDay = "节气为雨水"
elif b <=307 and b >= 305:
strOutMonthsDay = "节气为惊蛰"
elif b <=322 and b >= 320:
strOutMonthsDay= "节气为春分"
elif b <=406 and b >= 404:
strOutMonthsDay = "节气为清明"
elif b <=421 and b >= 419:
strOutMonthsDay = "节气为谷雨"
elif b <= 507 and b >= 505:
strOutMonthsDay = "节气为立夏"
elif b <= 522 and b >= 520:
strOutMonthsDay = "节气为小满"
elif b <= 607 and b >= 605:
strOutMonthsDay = "节气为芒种"
elif b <= 621 and b >= 622:
strOutMonthsDay = "节气为夏至"
elif b <= 708 and b >= 706:
strOutMonthsDay = "节气为小暑"
elif b <= 724 and b >= 722:
strOutMonthsDay = "节气为大暑"
elif b <= 809 and b >= 807:
strOutMonthsDay = "节气为立秋"
elif b <= 824 and b >= 822:
strOutMonthsDay = "节气为处暑"
elif b <= 909 and b >= 907:
strOutMonthsDay = "节气为白露"
elif b <= 924 and b >= 922:
strOutMonthsDay = "节气为秋分"
elif b <= 1009 and b >=1008:
strOutMonthsDay = "节气为寒露"
elif b <= 1024 and b >= 1023:
strOutMonthsDay = "节气为霜降"
elif b <= 1108 and b >=1107:
strOutMonthsDay = "节气为立冬"
elif b <= 1123 and b >= 1122:
strOutMonthsDay = "节气为小雪"
elif b <= 1208 and b >= 1206:
strOutMonthsDay = "节气为大雪"
elif b <= 1223 and b >= 1221:
strOutMonthsDay = "节气为冬至"
elif b <= 107 and b >= 105:
strOutMonthsDay = "节气为小寒"
elif b <= 121 and b >= 120:
strOutMonthsDay = "节气为大寒"
elif b< 505 and b>202:
strOutMonthsDay="这个月为春天。"
elif b<807 and b>505:
strOutMonthsDay ="这个月为夏天。"
elif b<1008 and b>807:
strOutMonthsDay ="这个月为秋天。"
else :
strOutMonthsDay = "这个月为冬天。"
self.labResult.setText(self.labResult.text() + ","+"," + strOutMonthsDay)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
MainWindow = CMainWindow()
sys.exit(app.exec_())
四、运行界面：
二、注解：
1：Python 使用def 开始函数定义，紧接着是函数名，括号内部为函数的参数。
2：如果程序中判断事件很多，全部用if的话，会遍历整个程序， 用elif 程序运行时，只要if或后续某一个elif之一满足逻辑值为True，则程序执行完对应输出语句后自动结束该轮if-elif（即不会再去冗余地执行后续的elif或else）。 提高效率。
3：nian%12+1意思是任意年份除以12加一的意思。
4：为什么二十四节气是按阳历计算的？
中国古代是一个农业社会，气候对农耕有非常重要的影响，因而中国古人对气候变化的研究十分关心。经过长期的观察，总结，把北半球的气候变化分成24种状况以及昼（白天）夜（晚上）的实际长短，制定了24节气【具体节气的含义见楼上】。由地理气象理论知道，地球气候的变化的根本原因是日照的变化，而日照的变化与地球和太阳的相对位置有关，也就是气候的周期性变化与（太）阳历对应。由此，24节气就与阳历吻合了。
农历实际上应该叫（太）阴历，是以月亮的圆缺变化为周期的，这个对农耕没有太大直接关系，但对潮汐有直接影响。每逢满月时潮水特别大，因此我国沿海的渔，农民在生产中就非常注意阴历。
中国古代对天象的观察主要是月亮和星星，而历法的制定主要是对天象的观察，古语有“斗转星移”表示日子的变化就是一个反映。因此中国古代主要式样的历法是阴历。阳历在西方科技发展起来并影响到中国后才引进使用。
5：24节气和12星座时间需自行查询。另外文章量较大，要有足够的耐心。
来源：CSDN
作者：liupeng__
链接：https://blog.csdn.net/liupeng__/article/details/103603541