Python 将用户指定的天数/月/年添加到今天

Question

我正在尝试在今天的日期中添加 x 天、月数或年数，其中 x 和频率都由用户提供。

我已经看过dateutil.relativedelta但由于它不接受字符串作为参数，我本可以尝试myStr=‘months=+6’然后使用relativedelta(myStr)我不知道该怎么办。任何提示将不胜感激。

谢谢。

Answer 1

您可以在此处使用relativedelta，只需正确指定即可。

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，并使用relativedelta返回基于calendar年的计算值。

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