班级互相影响

Question

i wants to make one class interact in another through a function. a button that when clicked, add 1. But when I make the interaction, there is an error saying that Resources has not been defined

this is what i'm tring, but nothing seens to happens

from tkinter import *


class Caracteristicas:

    def __init__(self,master):

        self.caracteristicas = Frame(master)
        self.caracteristicas.grid(row=1,column=0)

        self.forca = Label(self.caracteristicas, text='FORÇA FÍSICA')
        self.forca.grid(row=0,column=0)

        self.show_forca = Label(self.caracteristicas,text='1')
        self.show_forca.grid(row=0,column=1)

        self.b_forca = Button(self.caracteristicas,text='+',command=self.ad_for)
        self.b_forca.grid(row=0,column=2)

        self.Forca = 1

    def ad_for(self):
        global Forca
        self.Forca += 1
        Vida = self.Forca + 10
        self.show_forca['text'] = self.Forca
        Recursos.show_ferimentos['text'] = Vida


class Recursos:

    def __init__(self, master):

        self.recursos = Frame(master)
        self.recursos.grid(row=1,column=1)

        self.ferimentos = Label(self.recursos, text='FERIMENTOS')
        self.show_ferimentos = Label(self.recursos, text='10')

        self.ferimentos.grid(row=0,column=0)
        self.show_ferimentos.grid(row=1,column=0)


ficha = Tk()
a = Caracteristicas(ficha)
b = Recursos(ficha)
ficha.mainloop()

I would like to know how to make the interaction between the Characteristics class and the Resources class

I managed to solve the previous problem however, another appeared. This is my main program, and the solution proposed does not work in this case.

from tkinter import *
from Caracteristicas import Caracteristicas
from Recursos import Recursos

ficha = Tk()
a = Caracteristicas(ficha)
b = Recursos(ficha)
ficha.mainloop()

in the case they are different documents to be used in the main

Answer 1

If you have instances of two classes and you need function in one of them to modify data or call methods on the other, you usually will want to pass a reference to the other object into the one that is going to interact with it.

In your code, that probably means you should pass your reference to the Recursos instance into the constructor of you Caracteristicas object, where it can be used later.

Here's a very abbreviated version of what that could look like:

class Caracteristicas:
    def __init__(self, master, resource):
        self.resource = resource    # save value for later
        ... # the rest of the constructor can be the same

    def ad_for(self):
        self.Forca += 1
        Vida = self.Forca + 10
        self.show_forca['text'] = self.Forca
        self.resource.show_ferimentos['text'] = Vida   # main change is here!

You also need to change the code where you create your objects, to something like:

b = Recursos(ficha)
a = Caracteristicas(ficha, b) # pass the reference to the resource object in