如何在 var 上存储 Tkinter.Button 的值

Question

I'm novice with python. So i'm trying to make a GUI, when i click the button will open a directory selector(see on code 1),and i need storage the path from selection that i expected receive on "command" in a var, so i can use the directory path for another things.

Code 1 css.py

...
def selectFolder():
    path = customtkinter.filedialog.askdirectory()
    return path

Code 2 css.py

def button(root,txt,event = any):
    button = customtkinter.CTkButton(master = root,text=txt,command = event)
    return button;
...

Main code main.py

root = css.root()
frame = css.frame(root)
frame.pack(pady=20, padx=60, fill='both',expand=True)
label = css.label(frame,'Tecverde - Engenharia S.A','Roboto',10)
label.pack(pady=12, padx=10)
path = css.button(frame,"Selecione a pasta",css.selectFolder)
path.pack()
root.mainloop()

Answer 1

1. You are using custontkinter, so all your widgets are 'CTk...'
2. Your button widgets can contain 'commands', my suggestion is, inside the function passed to the 'ask' command you can use tkinter's filedialog module, and use the output as needed.

This is an example of using Stringvar, a tkinter dynamic variable, whenever you use the command set('') in it you will modify its value for the entire code, and to get the value you can use.get () anywhere in the code. Note that the debug label text changes after you dynamically select a directory.

from tkinter import filedialog

import customtkinter as css

root = css.CTk()
frame = css.CTkFrame(root)
frame.pack(pady=20, padx=60, fill='both', expand=True)
label = css.CTkLabel(frame, text='Tecverde - Engenharia S.A', font=('Roboto', 10))
label.pack(pady=12, padx=10)


def ask():
    dir = filedialog.askdirectory()
    path_var.set(dir)


path_var = css.StringVar(value='Empty Path')

path_button = css.CTkButton(frame, text="Selecione a pasta",
                            command=ask)
path_button.pack()

debug_label = css.CTkLabel(root, textvariable=path_var)
debug_label.pack()

root.mainloop()

In the second example, now using classes, self.path_var can be used anywhere in your code, even with a Stringvar as in the previous example, but now it has more options.

from tkinter import filedialog

import customtkinter as css


class App(css.CTk):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        frame = css.CTkFrame(self)
        frame.pack(pady=20, padx=60, fill='both', expand=True)

        label = css.CTkLabel(frame, text='Tecverde - Engenharia S.A', font=('Roboto', 10))
        label.pack(pady=12, padx=10)

        self.path_var = 'Empty path'

        path_button = css.CTkButton(frame, text="Selecione a pasta",
                                    command=self.ask)
        path_button.pack()

        self.debug_label = css.CTkLabel(self, text=self.path_var)
        self.debug_label.pack()

    def ask(self):
        dir = filedialog.askdirectory()
        self.path_var = dir
        self.debug_label.configure(text=dir)


if __name__ == '__main__':
    app = App()
    app.mainloop()