Python 将指定的用户 days/months/years 添加到今天

Question

我正在尝试将 x 天、月或年添加到今天的日期，其中 x 和频率均由用户提供。

我看过 dateutil.relativedelta 但由于它不接受字符串作为参数，我可能可以尝试 myStr=‘months=+6’ 然后用了 relativedelta(myStr) 不知如何是好。任何提示将不胜感激。

谢谢。

Answer 1

这里可以使用relativedelta，只要正确指定即可。

确保将今天的日期也指定为 datetime 对象。

from datetime import datetime
from dateutil.relativedelta import relativedelta

def add_calander(dmy, date):
    if dmy == 'D':
        value = int(input('How many days would you like to add?'))

        date = date + relativedelta(days=value)
    if dmy == 'M':
        value = int(input('How many months would you like to add?'))

        date = date + relativedelta(months=value)
    if dmy == 'Y':
        value = int(input('How many years would you like to add?'))

        date = date + relativedelta(years=value)

    return date

today = datetime.now()
dmy = input('Do you want to add days (D), months (M) or years (Y) to todays date?')

print(add_calander(dmy, today))

这允许用户指定日、月或年，并且 returns 使用 relativedelta.

基于 calendar 年计算的值

结果：

Do you want to add days (D), months (M) or years (Y) to todays date?M
How many months would you like to add?5
2020-10-15 08:19:56.814910

Do you want to add days (D), months (M) or years (Y) to todays date?Y
How many years would you like to add?10
2030-05-15 08:20:03.624634

Do you want to add days (D), months (M) or years (Y) to todays date?D
How many days would you like to add?6
2020-05-21 08:20:24.311311

Python 将指定的用户 days/months/years 添加到今天

Python add user specified days/months/years to today

python

datetime

python-dateutil

relativedelta