python入门小程序

python小程序: 实验目的:假设人一辈子活30000天,输入出生日期,计算死去的那一天。 实验过程:考虑的主要是年月日的逻辑控制以及python中函数传值的情况。另外熟悉python的date库。 实验:python的函数传值传的全是引用,类比于C语言也就是指针。如果传的是不可以变量的话(大部分变量都是不可变量,我知道的可变量只有列表List和字典Dictionary),那么如果在被调用函数内部改变了值的话会另外再新创一个变量,没有改变值的话就保持原来的变量。本例中,dead传到calumonth函数中,一开始的dead和原来的dead是一个东西,后来改变了值就另外新建了一个叫dead的新对象,多以最后要return返回这个变量。 源码: from datetime import date def calumonth(dead,feb): if dead.month == 2: #考虑闰月的情况 if dead.day == feb: dead = dead.replace(month=3) dead = dead.replace(day=1) else : newday = dead.day + 1 dead = dead.replace(day=newday) elif dead.month == 1 or dead.month == 3 or dead.month==5 or dead.month==7 or dead.month==8 or dead.month==10 or dead.month==12: #大月 if dead.day == 31: if dead.month == 12: newy = dead.year + 1 dead = dead.replace(year=newy) dead = dead.replace(month=1) dead = dead.replace(day=1) else: dead = dead.replace(day=1) newmonth = dead.month + 1 dead = dead.replace(month=newmonth) else: newday = dead.day + 1 dead = dead.replace(day=newday) else: if dead.day == 30: newmonth = dead.month + 1 dead = dead.replace(month=newmonth) dead = dead.replace(day=1) else: newday = dead.day + 1 dead = dead.replace(day=newday) return dead def deadday(year,month,day): bir = date(year,month,day) dead = bir while (dead-bir).days < 30000 : if dead.month != 12: newmonth = dead.month + 1 dead = dead.replace(month=newmonth) else: newyear = dead.year + 1 dead = dead.replace(year=newyear) dead = dead.replace(month=1) if (dead-bir).days != 30000: if dead.month != 1: abstractmonth = dead.month - 1 dead = dead.replace(month=abstractmonth) else: abyear = dead.year - 1 dead = dead.replace(year=abyear) dead = dead.replace(month=12) while (dead-bir).days != 30000 : if dead.year % 100 == 0: if dead.year % 400 == 0: dead = calumonth(dead,29) else: dead = calumonth(dead,28) elif dead.year % 4 == 0: dead = calumonth(dead,29) else: dead = calumonth(dead,28) if (dead-bir).days == 30000: return dead else: return print(deadday(1998,7,9)) #在此改变出生日期