How do I write two variable dates in a function?

Question

For an exercise, I'm supposed to write a function with two dates as variable inputs and compare them. However, whatever way I try to define the function, it gives me an invalid syntax.

I'm trying to do something like this:

from datetime import date

def birthday(date(year1, month1, day1), date(year2, month2, day2)):
    party = False
    if month1 == month2 and day1 == day2:
        party = True

    return party

It is intended that the function be called like this:

birthday(date(1969, 10, 5), date(2015, 10, 5))

Can you edit your question to give an example of how you want to call the function? — Andrew Morton
– Andrew Morton, Commented Nov 23, 2019 at 17:58
dodona.ugent.be/en/courses/172/series/1697/exercises/1652696920 — n00b.py
– n00b.py, Commented Nov 23, 2019 at 18:07
As a new user to this site, you probably haven't been shown this: What should I do when someone answers my question? — Andrew Morton
– Andrew Morton, Commented Nov 23, 2019 at 18:53

Andrew Morton · Accepted Answer · 2019-11-23 18:13:49Z

1

You don't declare the components of the dates in the function arguments because it they are ready-made dates being passed to it, as shown in the examples given, such as

birthday(date(1969, 10, 5), date(2015, 10, 5))

So you just need to:

import datetime
from datetime import date

def birthday(date1, date2):
    party = False

    if date1.month == date2.month and date1.day == date2.day:
        party = True

    return party

Then you can do

bd1 = date(2000, 10, 20)
bd2 = date(2008, 10, 20)
bd3 = date(2000, 10, 1)

print(birthday(bd1, bd2))
print(birthday(bd1, bd3))

And get the output

True
False

(You might not need the import datetime: I did.)

You could even shorten the function to

def birthday(date1, date2):
    return date1.month == date2.month and date1.day == date2.day

answered Nov 23, 2019 at 18:13

Andrew Morton

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Comments

Hampi · Accepted Answer · 2019-11-23 18:14:21Z

1

Well, question is not clear but you can do it in this way:

from datetime import date

def birthday(date1,date2):
    party = False
    if date1.month == date2.month and date1.day == date2.day:
        party = True

    return party

date1= date(2019, 4, 13)
date2= date(2019, 4, 13)

print(birthday(date1,date2))

Output:

True

answered Nov 23, 2019 at 18:14

Hampi

111 bronze badge

1 Comment

Andrew Morton Over a year ago

A little bit of explanation as to why the OP's function wasn't working could help to get you an upvote ;)

Mostafa Babaii · Accepted Answer · 2019-11-24 06:22:38Z

1

if you want to compare month and day from 2 dates to check birthday, try blow code:

from datetime import date

def bd(d1: date, d2: date) -> bool:
    return d1.month == d2.month and d1.day == d2.day

print(bd(date(1989, 8, 11), date(2019, 8, 11)))

edited Nov 24, 2019 at 6:22

answered Nov 23, 2019 at 18:37

Mostafa Babaii

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