Removing unwanted characters in a list in tkinter, while using the random module

I made a character randomizer in tkinter that takes the user entry, then feeds it through random.shuffle with a button, then prints it on a LabelFrame, also saving it to a text file. I don't know where/how I would insert code to remove the spaces, commas and brackets. I've searched other questions but to no avail, I can't seem to implement other answers to my specific problem.

Here is some example code, thanks a bunch! I didn't want to flood the screen with all the code, this is my first post here, but if more is needed then I could just copy-paste it all.

e = Entry(root, bd=3, bg='white')
e.pack(fill=X, pady=3, padx=3)

def get_answer():
    answer = list((e.get()))
    global widget
    widget = LabelFrame(frame2, text='Please 
    click Randomize', bd=0, width=500, 
    height=300, bg='white', font=150)
    widget.pack(padx=3)
    file_create = open('text.txt', 'w+', 
    encoding='utf-8')
    for i in range(1):
        random.shuffle(answer)
        file_create.write(str(answer))

    file_create.close()
    button.config(state=tk.DISABLED)

def file_opener():
    global m
    widget.destroy()
    f = open('text.txt', 'r', encoding='utf-8')
    m = LabelFrame(frame2, width=500, 
    height=300, bd=0, bg='white', font=150, 
    text=f.read())
    m.pack(expand=TRUE)
    f.close()
    button_3.config(state=tk.DISABLED)