Is there a way to check for duplicates in a list?

Question

I have a program i need to create and one of the tasks are to have the user input 5 numbers(integer) for each day of the week (Monday-Friday). For those 5 numbers i need to figure out if there are any duplicates that the user has inputted and display which two days are the duplicates using a single list that contains strings and integers and finally display them. Im new to programming and i would very much appreciate the help!

using python 3.x

Thank you!

Answer 1

You could use a dictionary to keep track of the days for each number. See the following example:

days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday']

# get numbers
numbers = dict()
for day in days:
    n = input(f'enter number for day {day}: ')
    if n in numbers:
        numbers[n].append(day)
    else:
        numbers[n] = [day]

# find duplicates
for n, ds in numbers.items():
    if len(ds) > 1:
        print(f'duplicate number {n} for days', *ds)