Ren'Py Class problems

[CrimsonAxisStudio]

Having some issues with earning money with classes.

Here's the code.

init python:
    class Item:
        def __init__(self, name, cost):
            self.name = name
            self.cost = cost

    class Inventory:
        def __init__(self, money=0):
            self.money = money
            self.items = []

        def buy(self, item):
            if self.money >= item.cost:
                self.money -= item.cost
                self.items.append(item)
                return True
            else:
                return False

        def earn(self, amount):
            self.money += amount

        def has_item(self, item):
                if item in self.items:
                    return True
                else:
                    return False

Trying to use the earn to add money and spend it.

c "Ok. Here's $200. There's a store nearby."
$ earn.money(200)

Getting "earn money is not defined.". Not quite sure what to do, because it seems to be defined in the class, unless I'm wrong about something. I've looked at a number of tutorials online and they have things set up this way. It's possible that these tutorials are out of date and that's the issue.

Any help would be appreciated.

Thanks!

 

[barotok]

You need to create an object of class Inventory

myInventory = Inventory()

then call it

myInventory.earn(200)

 

[CrimsonAxisStudio]

Ahh, I already had an inventory defined. It was inventory.earn vs earn.money that was causing the problem.

Now, is it possible to reference the money value for a text button or for a say statement? So the player knows how much money they have, etc.

 

[barotok]

Probably something like

text "[myInventory.money]"

 

[Rich]

Probably something like

text "[myInventory.money]"

Yes, that generally works.

There are, in general, three options:

• What you listed, where you use the Ren'py interpolation feature. This works for simple variables and object.property references.

• If all you want is the value, you can frequently just do

text my_string_variable

in other words, you don't HAVE to put a variable interpolated inside a string - Ren'py can evaluate the variable name.

• Sometimes, the expression that you want to show confuses Ren'py's interpolation. In that case, you can use Python string formatting:

text "Welcome to my {}".format(get_the_value(27))

 

[anne O'nymous]

   class Inventory:
[...}
        def earn(self, amount):

[...]

$ earn.money(200)

What is this earn object that have a money method ? There's absolutely nothing in the code you gave as example that can relate to this...

You meant :

default inventory = Inventory()
[...]
label whatever:
    $ inventory.earn( 200 )

 

[CrimsonAxisStudio]

Great answers. Thank you.

Helped me move forward to the next thing in my project. Thanks!!