How to find weekday name from the Python's Datetime object?

Question

So I just started learning python and tried to make a program that tells you day on a given day. I discovered datetime and tried to use it, but the problem is I am getting key error even though the key is present.

Here's my code:

import datetime

def day_finder(dd,mm,yy):

    tags = { '1' : 'Monday' ,'2' : 'Tuesday' ,'3' : 'Wednesday' ,'4' : 'Thursday' ,'5' : 'Friday' ,'6' : 'Saturday' ,'7' : 'Sunday' }
    return tags[int(datetime.datetime(yy,mm,dd).isoweekday())]


d = int(input("Enter a date"))
m = int(input("Enter a month"))
y = int(input("Enter a year"))

print (day_finder(d,m,y))

Answer 1

You are searching for an int weekday number, but instead you should be checking for the string because the keys in your dictionary are of str type. For example:

>>> tags = { '1' : 'Monday' ,'2' : 'Tuesday' ,'3' : 'Wednesday' ,'4' : 'Thursday' ,'5' : 'Friday' ,'6' : 'Saturday' ,'7' : 'Sunday' }

>>> import datetime
>>> tags[str(datetime.datetime(1990,03,28).isoweekday())]
'Wednesday'

However, you do not need a dict object to get the weekday name based on the key day number. You may get the desired result via using .strftime('%A') on the datetime object as:

>>> datetime.datetime(1990,03,28).strftime("%A")
'Wednesday'