Another question from me.

[Jeymen]

Hello! I would like to access qr_extension, etc in qr_gen.

import customtkinter
import qrcode
class Generate(customtkinter.CTk):
    def __init__(self):

        self.app = customtkinter.CTk()
        self.app.configure(bg='#11121E')
        self.app.geometry('700x500')
        self.app.title('QR code generator')
        self.qr_data_entry = customtkinter.CTkEntry(master=self,
         placeholder_text='Enter text', width=237, height=30)
        self.qr_data_entry.place(x=163, y=55)
        self.qr_name_entry = customtkinter.CTkEntry(master=self,
         placeholder_text='Enter file name', width=237, height=30)
        self.qr_name_entry.place(x=163, y=101)
        self.qr_extension_entry = customtkinter.CTkEntry(master=self,
         placeholder_text='Enter file extension', width=237, height=30)
        self.qr_extension_entry.place(x=163, y=147)
        self.button = customtkinter.CTkButton(
     master=self,
     text='Submit',
     text_font=('Poppins', 10, 'bold'),
     text_color='White',
     fg_color='343638',
     )
        self.qr_data_entry = customtkinter.CTkEntry(master=self,
         placeholder_text='Enter text', width=237, height=30)
        self.qr_data = self.qr_data_entry.get()
        self.qr_name = self.qr_name_entry.get()
        self.qr_extension = self.qr_extension_entry.get()
    def qr_gen(self):
            self.allowed_extensions = [
             'png',
             'jpg',
             'PNG',
             'JPG',
             'jpeg',
             'JPEG',
             'jfif',
             'JFIF',
             'webp',
             'WEBP',
             ]
            
            if self.qr_extension in self.allowed_extensions:
                 try:
                        ......

[Akascape]

@Jeymen Don't put the variables in the function as you are not returning any value from it.
You can put them in the class directly (outside function) so that you can access it easily.

example:

import customtkinter
class Generate(customtkinter.CTk):
    
    allowed_extensions = [
             'png',
             'jpg',
             'PNG',
             'JPG',
             'jpeg',
             'JPEG',
             'jfif',
             'JFIF',
             'webp',
             'WEBP',
             ]
    
    def __init__(self):
        self.qr_gen()
        
    def qr_gen(self):
            print(self.allowed_extensions)
    
if __name__ == "__main__":
    app = Generate()

[Jeymen]

I literally copied the exact code and still got an error.

AttributeError: '_tkinter.tkapp' object has no attribute 'allowed_extensions'

@Akascape

[Akascape]

@Jeymen The example code that I wrote is working fine in my machine.
You have to use it like this outside the class: Generate.allowed_extensions