How to call a function on Tkinter class? - class

Question

I'm trying to use a function which a placed inside the class of Tkinder but the function(aktodec) can't be found and a get an error. I don't wanna call the def as a command of a button but as a function that will give value to one of my variables
from Tkinter import *
class ADialog:
def __init__(self, parent):
top = self.top = Toplevel(parent)
Label(top, text="Number to convert").pack()
self.numb = Entry(top)
self.numb.pack(padx=15)
Label(top, text="Base of incered number").pack()
self.base = Entry(top)
self.base.pack(padx=15)
Label(top, text="Base you want to be converted").pack()
self.basemet=Entry(top)
self.basemet.pack(padx=15)
b = Button(top, text="OK", command=self.met)
b.pack(pady=5)
def aktodec(self,num,base): #####commands
dec=0
num=num[::-1]
num1=[]
for i in range(len(num)):
num1.append(num[i])
if base>9:
for i in range(len(num1)):
if str(num1[i])=='A':
num1.remove(num1[i])
num1.insert(i,'10')
if str(num1[i])=='B':
num1.remove(num1[i])
num1.insert(i,'11')
if str(num1[i])=='C':
num1.remove(num1[i])
num1.insert(i,'12')
if str(num1[i])=='D':
num1.remove(num1[i])
num1.insert(i,'13')
if str(num1[i])=='E':
num1.remove(num1[i])
num1.insert(i,'14')
if str(num1[i])=='F':
num1.remove(num1[i])
num1.insert(i,'15')
for i in range(len(num)):
s=int(num1[i])*(int(base)**i)
dec=dec+s
else:
for i in range(len(num1)):
s=int(num1[i])*(int(base)**i)
dec=dec+s
return dec
def met(self):
num=self.numb=str(self.numb.get())
base=self.base =int(self.base.get())
basemet=self.basemet=int(self.basemet.get())
if base==basemet:
Label(root,text="The number "+self.numb+"is converted to"+self.numb) ##why can't be print??
if base==10:
new=num
else:
new1=self.aktodec(num,base) ####why aktodec doesn't give value to "new"??
Label(root,text="Number is"+str(new))
self.top.destroy()
root = Tk()
def open_dialog():
dial = ADialog(root)
root.wait_window(dial.top)
root.wm_geometry("400x300+20+40")
message=StringVar()
message.set("Complete the form")
Label(root, textvariable=message).pack(padx=30)
root.update()
message.set("Form completed")
Button(root, text="Done", command=root.destroy).pack()
Button(root, text="new", command=open_dialog).pack()
root.update()
root.mainloop()
And also I have a problem whith the label
Label(root,text="The number "+self.numb+"is converted to"+self.numb
which (i don't know why) won't appear to the root even the base=basemet.
Help please!