Ftyjtk

I'm trying to delete the radiobuttons from my GUI using a Clear button. I found this example: enter link description here I know that I have to create a reference list for the Radionbutttons when creating them with a loop. And I can remove a button with grid_remove(). The point where I'm failing is to create the reference list. I'm getting a IndentationError: unexpected indent when i enter master.buttons.grid(column=val, row=2) into the Loop. This is my reduced code example:

import Tkinter as tk

master = tk.Tk()

var_step = IntVar()

step_mgl=session.odbs[path].steps.keys() #Imports the names of the steps from a file



i=0

steps=

while i < len(step_mgl):

    steps.append((step_mgl[i], i+1))

    i+=1



def clear():

    for button in master.buttons:

        button.grid_remove()

    del master.buttons



master.buttons=

for txt, val in steps:

    master.buttons.append(Radiobutton(master, 

                text=txt,

                variable=var_step, 

                command=update,

                value=val))

    master.buttons.grid(column=val, row=2)



Button(master,text='Clear',command=clear).grid(row=3)



mainloop()

I tried so many things but i can't get this fixed, it's always the same Error. Thank you guys.

enter image description here