CODEWITHSUNDEEP
pythonlistdictionary
Kinghin245
Kinghin245

Reputation: 49

How do I update dictionary from items of list?

I have the following problem:

Imagining that I killed a dragon and it drops loot, how do I update my inventory from the loot? I figured how to append if the loot does not exist in the inventory but if they already there, I am not sure how to update it.

Here are the codes:

UserInventory = {'rope': 1, 'torch':6, 'gold coin':42, 'dagger': 1, 'arrow': 12}

def showstuff(storeno):
items_total = 0
for k, v in storeno.items():
    print('Item :' + k + '---' + str(v))
    items_total = items_total + v
print('Total Items:' + str(items_total))

'''def addstuff(inventory, additem):
    I'm not sure what to do here

dragonloot = ['gold coin', 'gold coin', 'rope']
addstuff(UserInventory, dragonloot)'''
showstuff(UserInventory)

Upvotes: 2

Views: 184

Answers (2)

Pritam Pan
Pritam Pan

Reputation: 133

You can use the following sample code ...

def addstuff(inventory, additem):
    for newitem in additem:
        if newitem in inventory:
            inventory[newitem] += 1
        else:
            inventory[newitem] = 1

Upvotes: 2

albert
albert

Reputation: 8583

You should have a look at Counters:

from collections import Counter

inventory = {'rope': 1, 'torch':6, 'gold coin':42, 'dagger': 1, 'arrow': 12}
inventory_ctr = Counter(inventory)

update = ['rope', 'torch']
update_ctr = Counter(update)

new_inventory_ctr = inventory_ctr + update_ctr

print(new_inventory_ctr)

Upvotes: 5

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