Changing an object's attribute on a specific list

[Cazad0ra]

Hi! I'm going to try to explain the situation as best as possible:
I'm working on a storage system to go with an inventory system, so basically, I have those two different lists of game items. Transfering items is no big deal in general, my issue comes with a specific type of item that has an attribute "charges", which basically stacks for example 5 potions into 1 with 5 charges.

That's when my issue comes, since I can transfer that first potion, but I don't know how to add charges to that item specifically in the storage list.

Here's the code I currently have on the function to add the item to the storage list:

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def deposit(self, target):
            if self in target: #Where self is the item and target is the list
                self.charges += 1  #Here's where I need to tell RenPy to perform this action in the storage list

            else:
                target.append(self)

I hope this makes sense ^^"

[Ocelot]

if self in target this line will cause problem for custom objects unless you properly redefined comparison operators.
Example:

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class foo:
    def __init__(self):
        self.bar = 5
 
a = foo()
b = foo()
c = []
c.append(a)
a in c # True
b in c # False

As you can see, even though both a and b contain same data, one of it is considered to be in a list, and other is not. This is because default behavior of == operator is to check identity, not equality.

Now, when this is out of the way, you can search for item in list and update its value manually:

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for idx in range(0, len(target)):
    if target[idx].name == self.name: # Or whatever condition you use to determine if it is an item you want.
        target[idx].charges += 1
        break
else: # Yes, this else belongs to for loop, not if statement
    target.append(self)