How to add a value in a specific location/index in set in Python 3?

Question

How do i add a set of values in order (per inventory) from a user's input for e.g. {fruit:{1,2,3,4},{veggies:{5,6,7,8}}

Nothing i've tried so far ever worked.

Here's my code:

def Create_Inventory():

    clear()
    inventory_dictionary = {}

    count_inventory = int(input("Enter the number of Inventories: "))

    for num_inv in range(count_inventory):

        add_inventory = str(input("Enter Inventory #%d: " % (num_inv + 1)))
        inventory_dictionary[add_inventory] = set()

    for find_key in inventory_dictionary:
        count_item = int(input("\nHow many items in %s inventory: " % find_key))
        for num_item in range(count_item):
            #add_item = input("Enter item #%d: " % (num_item + 1))
            #inventory_dictionary[find_key].add(add_item)
            add_item = set(input("Enter item #%d: " % (num_item + 1)))
            inventory_dictionary[find_key].update(add_item)

My full code: https://pastebin.com/gu5DJX5K

jpp · Accepted Answer · 2018-09-29 23:56:17Z

2

Sets are unordered collections. What you want is impossible. Consider these alternatives:

list, ordered but permits duplicates.
dict.keys in Python 3.6+, where dictionaries are insertion ordered.
OrderedDict.keys in Python versions prior to 3.6.
Create a custom class, e.g. this recipe.
Use a 3rd party library, e.g. ordered-set.

See also: Does Python have an ordered set?

answered Sep 29, 2018 at 23:56

jpp

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1 Comment

Geni-sama Over a year ago

I see. That's why. I'll check on those thank you. Have a wonderful day sir!

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