Tkinter - set master in another script

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I am creating a GUI with Tkinter and I am having problems separating functions from the main file (as it is getting too big).

I created a new function file, when I try to import the creative function from a new screen (Toplevel) I get the error that the mother window (master) is not recognized:

consumeScreen = Toplevel(mainScreen)

NameError: name 'mainScreen' is not defined

follows the code from the first screen:

from tkinter import *
import funções as fc

mainScreen = Tk()
mainScreen.geometry('600x415')
mainScreen.title('System')
mainScreen['bg'] = 'black'

fc.consume()

Now the constructor function which is in a 2° file called 'functions':

def consume():
    consumeScreen = Toplevel(mainScreen)
    consumeScreen.geometry('500x500')
    consumeScreen.title('Report Consume')

How do I make the second file recognize the name of the home screen (mainScreen)?

python tkinter

1 answer

0

You can’t just play a file variable .py running to an imported file. To troubleshoot the problem, you can pass mainScreen as a function argument consume. Example:

Second file . py

def consume(mainScreen):
    consumeScreen = Toplevel(mainScreen)
    consumeScreen.geometry('500x500')
    consumeScreen.title('Report Consume')

Script . py to be executed.

from tkinter import *
import funções as fc

mainScreen = Tk()
mainScreen.geometry('600x415')
mainScreen.title('System')
mainScreen['bg'] = 'black'

fc.consume(mainScreen)

  • It does not work because the command parameter set with the function inside a button does not accept arguments: bt_Consume = Button(text = 'Report Consume', command = Fc.consume)

  • 1

    Can you please leave all the code so I can help you ?

  • The whole code is too big, it makes it impossible to share. I managed to solve by creating a smaller function that only matters the constructor function (where there is all the code of the new window). I don’t think that’s the best solution, but it worked.

  • For the code you presented in the question, the only way to correct it is the one I put in the answer. But other parts of your code apparently have some problems like you said in the comment above. This parameter "command" for example, I didn’t even know it existed.

  • This parameter is the Tkinter for buttons, where I pass a function that will be executed when pressing the button, however, this function can not receive any parameter. So the solution I found is to create a smaller function, responsible for calling the main function (which builds the app screen) and pass it to the command parameter. But thanks for your help!

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