How to clear the entry widget in a GUI after a button is pressed in python

Question

I'm trying to clear the entry widget after the user presses a button using tkinter in python. I tried using ent.delete(0,END) but I got an error saying that strings dont have the attribute delete

here is my code: I'm getting error on real.delete(0, END).

secret = randrange(1,100)
print(secret)
def res(real, secret):
    if secret==eval(real):
        showinfo(message='that is right!')
    real.delete(0, END)

def guess():
    ge = Tk()
    ge.title('guessing game')

    Label(ge, text="what is your guess:").pack(side=TOP)

    ent = Entry(ge)
    ent.pack(side=TOP)

    btn=Button(ge, text="Enter", command=lambda: res(ent.get(),secret))
    btn.pack(side=LEFT)

    ge.mainloop()

Answer 1

I'm unclear about your question. From http://effbot.org/tkinterbook/entry.htm#patterns, it seems you just need to do an assignment after you called the delete. To add entry text to the widget, use the insert method. To replace the current text, you can call delete before you insert the new text.

e = Entry(master)
e.pack()

e.delete(0, END)
e.insert(0, "")

Could you post a bit more code?

Answer 2

After poking around a bit through the Introduction to Tkinter, I came up with the code below, which doesn't do anything except display a text field and clear it when the "clear text" button is pushed. You can probably shorten it; I was following a model in the tutorial.

import sys
import Tkinter

class App:
    def __init__(self, master):
        fr = Tkinter.Frame(master, height=42, width=42)
        fr.pack()
        self.txt_ent = Tkinter.Entry(fr)
        self.txt_ent.pack()
        self.clear_button = Tkinter.Button(fr, text="clear text", command=self.clear_text)
        self.clear_button.pack()  

    def clear_text(self):
        self.perform_random_action()
        self.txt_ent.delete(0, Tkinter.END)

    def perform_random_action():
        # Do random stuff

def main():
    main_win = Tkinter.Tk()
    app = App(main_win)
    main_win.mainloop()
    return 0

if __name__ == "__main__":
    sys.exit(main())

Answer 3

It seems you are calling .delete on a string. Assuming the entry_widget variable holds the widget itself, you probably did this somewhere:

ent = entry_widget.get()

so now ent is just a string (which has no idea where it came from and no way to affect the widget). Instead, do it on the widget itself:

entry_widget.delete(0, END)

If this doesn't help, please post your code.

Answer 4

ent.delete(0,END) is the correct answer. If you get the error you say you do, you have an error in your code. You will need to show us the code if you are unable to spot the error yourself.