How to check if a date is expired but also make sure that it is no more than a year from today's date

Question

I have tried to use the datetime code but i really don't understand it very much. I have managed to allow the user to input a date but i am not quite sure how to compare the dates. Here is what i have so far.

from datetime import datetime
now = datetime.now()

import re

validDate = False
while not validDate:
    cdate = input("please enter your card expiration date: ")

    if (re.match("^([0-9]{2})/([0-9]{2})/([0-9]{4})$", cdate)):
        print("Valid")
        validDate = True
    else:
        print("Error. Enter date in format dd/mm/yyyy")

I really have no clue how to compare the two please help me. if you have any suggestions for code that might be on this site please tell me. In the meantime i will keep trying to research.

Possible duplicate of [How to compare two dates?](https://stackoverflow.com/questions/8142364/how-to-compare-two-dates) — GPhilo, Feb 06 '18 at 09:23
i have looked at how to compare two dates and tried the code but it has not worked for me, — darius DEAnzo, Feb 06 '18 at 09:38
Please update your question with the code you tried then. In your sample code there is no comparison yet. — GPhilo, Feb 06 '18 at 09:40

Vikas Periyadath · Accepted Answer · 2018-02-09T05:44:57.410

0

you can try this one :

 from datetime import datetime, date
 datet = input("please enter your card expiration date: ")

 ExpirationDate = datetime.strptime(datet,"%Y-%m-%d").date()
 now = date.today()
 if ExpirationDate < now:
      print("expired")

for your second condition you can use ExpirationDate.year for the year of entered date and now.year for current year. With that you can write condition according to your need .

 if ExpirationDate.year > now.year+1:
      print("date not accepted")
 elif ExpirationDate < now :
      print("expired")
 else :
      print("valid ")

remaining all code is same

UPDATE :

from datetime import datetime, date

while True:
    datet = input("please enter your card expiration date: ")
    ExpirationDate = datetime.strptime(datet, "%Y-%m-%d").date()
    now = date.today()
    if ExpirationDate.year > now.year + 1:
         print("date not accepted")
         continue
    elif ExpirationDate < now:
         print("expired")
         continue
    else:
         print("valid ")
         break

it will again ask to enter date if date not accpted or expired

edited Feb 09 '18 at 05:44

answered Feb 06 '18 at 09:30

Vikas Periyadath

3,088
1
21
33

I tired but every time i enter a date it doesn't do anything. it just moves on to the next part of the code – darius DEAnzo Feb 06 '18 at 09:36
Is this what you mean by the format of the input? 2016-06-12 – darius DEAnzo Feb 06 '18 at 09:39
So when you want to print expire ? when the entering date is less than today or higher than today ? – Vikas Periyadath Feb 06 '18 at 09:42
when it is less than today. but also when it is more than a year in the future from today – darius DEAnzo Feb 06 '18 at 09:43
Thank you it works now if i input a date that is less than today. how would i be able to do the second part of the code and not allow the user to input a date further than a year in the future. – darius DEAnzo Feb 06 '18 at 09:48
Can you explain with some sample data and o/p, i can surely help you with that . – Vikas Periyadath Feb 06 '18 at 09:52
for example if the date entered is 2010-01-01 then it should be wrong – darius DEAnzo Feb 06 '18 at 09:53
the current code is working for the same right ? about second condition. – Vikas Periyadath Feb 06 '18 at 09:54
@dariusDEAnzo check the updated answer . Is that you want to do in your second condition ? – Vikas Periyadath Feb 06 '18 at 11:28
That works perfectly! Thank you so much for your time and skill. If i could ask one more thing, how do i make it so that it restarts the code if its wrong? – darius DEAnzo Feb 08 '18 at 14:44
@dariusDEAnzo wrong means which condition, expired or date not accepted ? – Vikas Periyadath Feb 09 '18 at 05:33
sorry i wasn't on for a while i had a problem. yes by wrong i mean expired. thank you. – darius DEAnzo Feb 26 '18 at 14:00
yes the code is now perfect. thank you so much for everything. you have been very patient and helpful. – darius DEAnzo Feb 26 '18 at 14:07

score 0 · Answer 2 · answered Feb 06 '18 at 09:38

0

In your case, you should use calendar.

answered Feb 06 '18 at 09:38

yann

652
7
14

How to check if a date is expired but also make sure that it is no more than a year from today's date

2 Answers2