Here's the program:
# !/usr/bin/python 3.5.2
# -*- coding: UTF-8 -*-
from tkinter import *
import math
class frame(Frame):
def __init__(self, master = None):
Frame.__init__(self, master)
self.master = master
self.init_frame()
def init_frame(self):
self.master.title("KunsFormule")
self.pack(fill=BOTH, expand=1)
self.ratio1 = Entry(self, width=30).pack(side=TOP, padx=10, pady=10)
self.doenSom = Button(self, text="Doen Som",
command=self.data_prossesering)
self.doenSom.place(x=155, y=40)
self.uiset = Entry(self, width=20).pack(side=TOP, padx=50, pady=50)
def data_prossesering(self):
e = self.ratio1.get()
e.split()
r1 = float(e[0]) * float(e[1])
r2 = float(e[2]) * float(e[3])
a = r1/r2
return TkmessageBox.showInfo(math.sqrt(a)
root = Tk()
root.geometry("400x300")
app = frame(root)
root.mainloop()the objective of this program is to solve the following mathematical problem: the square root of the answer of 4 cross-multiplied numbers which are separated in pairs and divided by each other. the numbers are entered by the user in a text field, then when the button is clicked the square root appears in another text field below it. however, when i click the button, the following error appears:Error: Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python3.5/tkinter/__init__.py", line 1553, in __call__
return self.func(*args)
File "/complete/path/to/file.py", line 42, in data_prossesering
e = self.ratio1.get()
AttributeError: 'NoneType' object has no attribute 'get'
