change a variable thru a dialog box

[Jay Samson]

How do I change a variable thru an entry dialog box in tkinter or python, as x = 1 and the user changes it to x = 2?? I can't seem to find the answer.

[bvdet]

Jay,

Could you post the code you tried? Have you created a textvariable?

[Jay Samson]

Hi, thanks for your reply. This is the code I've been trying with. I can write a variable on the window but I haven't been able to start with a default value then change it through the entry widget. Please help it is driving me crazy.

from Tkinter import *
 
master = Tk()
 
master.title("test")
 
w = Canvas(master, width=500, height=500)
w.pack()
 
w.config(background="black")
 
defv = 100
a = IntVar()
a.set(defv)
v2 = a.get()
 
e = Entry(master)
e.pack()
 
def callback():
    v = e.get()
    a.set(v)
    v2 = a.get()
    w.create_text(100, 100, font="Purisa", text=v2, fill="white")
 
c = Button(master, text="change", width=10, command=callback)
c.pack()
 
master.mainloop()
 

[bvdet]

Assign textvariable to the IntVar.

from Tkinter import *
 
master = Tk()
 
master.title("test")
 
w = Canvas(master, width=500, height=500)
w.pack()
 
w.config(background="black")
 
defv = 100
a = IntVar()
a.set(defv)
v2 = a.get()
 
e = Entry(master, textvariable=a)
e.pack()
 
def callback():
    v2 = a.get()
    w.create_text(100, 100, font="Purisa", text=v2, fill="white")
 
c = Button(master, text="change", width=10, command=callback)
c.pack()
 
master.mainloop()