计算年龄 python

Question

我正在尝试创建一个代码，要求用户提供他们的出生日期和今天的日期以确定他们的年龄。目前我写的是：

print("Your date of birth (mm dd yyyy)")
Date_of_birth = input("--->")

print("Today's date: (mm dd yyyy)")
Todays_date = input("--->")


from datetime import date
def calculate_age(born):
    today = date.today()
    return today.year - born.year - ((today.month, today.day) < (born.month, born.day))

age = calculate_age(Date_of_birth)

然而，它并不像我希望的那样运行。有人可以向我解释我做错了什么吗？

Answer 1

太近了！

您需要先将字符串转换为日期时间对象，然后才能对其进行计算 - 请参阅 datetime.datetime.strptime()。

对于您的日期输入，您需要做：

datetime.strptime(input_text, "%d %m %Y")

#!/usr/bin/env python3

from datetime import datetime, date

print("Your date of birth (dd mm yyyy)")
date_of_birth = datetime.strptime(input("--->"), "%d %m %Y")

def calculate_age(born):
    today = date.today()
    return today.year - born.year - ((today.month, today.day) < (born.month, born.day))

age = calculate_age(date_of_birth)

print(age)

PS：我强烈建议您使用合理的输入顺序 - dd mm yyyy 或 ISO 标准 yyyy mm dd

Answer 2

这应该有效:)

from datetime import date

def ask_for_date(name):
    data = raw_input('Enter ' + name + ' (yyyy mm dd): ').split(' ')
    try:
        return date(int(data[0]), int(data[1]), int(data[2]))
    except Exception as e:
        print(e)
        print('Invalid input. Follow the given format')
        ask_for_date(name)


def calculate_age():
    born = ask_for_date('your date of birth')
    today = date.today()
    extra_year = 1 if ((today.month, today.day) < (born.month, born.day)) else 0
    return today.year - born.year - extra_year

print(calculate_age())

Answer 3

您也可以通过这种方式使用日期时间库。这将计算年龄，并消除 returns 由于月份和日期属性

导致年龄错误的逻辑错误

比如 1999 年 7 月 31 日出生的人在 2017 年 7 月 30 日之前是 17 岁

代码如下：

import datetime

#asking the user to input their birthdate
birthDate = input("Enter your birth date (dd/mm/yyyy)\n>>> ")
birthDate = datetime.datetime.strptime(birthDate, "%d/%m/%Y").date()
print("Your birthday is on "+ birthDate.strftime("%d") + " of " + birthDate.strftime("%B, %Y"))

currentDate = datetime.datetime.today().date()

#some calculations here 
age = currentDate.year - birthDate.year
monthVeri = currentDate.month - birthDate.month
dateVeri = currentDate.day - birthDate.day

#Type conversion here
age = int(age)
monthVeri = int(monthVeri)
dateVeri = int(dateVeri)

# some decisions
if monthVeri < 0 :
    age = age-1
elif dateVeri < 0 and monthVeri == 0:
    age = age-1


#lets print the age now
print("Your age is {0:d}".format(age))

Answer 4

 from datetime import datetime, date
def calculateAge(birthDate): 
    today = date.today() 
    age = today.year - birthDate.year - ((today.month, today.day) < (birthDate.month, birthDate.day)) 
    return age 
d=input()
year=d[0:4]
month=d[5:7]
day=d[8:]
if int(month)<=0 or int(month)>12:
    print("WRONG")
elif int(day)<=0 or int(day)>31:
    print("WRONG")
elif int(month)==2 and int(day)>29:
    print("WRONG")
elif int(month) == 4 or int(month) == 6 or int(month) == 9 or int(month) ==11 and int(day) > 30:
    print("WRONG")
else:       
    print(calculateAge(date(int(year),int(month),int(day))))

此代码适用于每个日期。

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