Importing classes?

[frequency]

From "imported" i removed the class and sticked all the functions to the __init__ method.

IMPORTED.py

from tkinter import *
import numpy as np
import os
import sys
import GUI
import subprocess 
        
def __init__(self,root):
    root=Tk()
####### Gets the requested values of the height and widht.
    windowWidth = root.winfo_reqwidth()
    windowHeight = root.winfo_reqheight()
    # Gets both half the screen width/height and window width/height
    positionRight = int(root.winfo_screenwidth()/2 - windowWidth/2)
    positionDown = int(root.winfo_screenheight()/2 - windowHeight/2)
    # Positions the window in the center of the page.
    root.geometry("+{}+{}".format(positionRight, positionDown))
##########----------------------
    root.title("Αφαίρεση πινάκων")
    root.iconbitmap("minus_ico.ico")
    root.resizable(False, False)
    self.root=Frame(root)
    self.root.pack()
    self.start()
    self.entries1=[]
    self.entries2=[]
    self.entry_list1=[]
    self.entry_list2=[]
    self.entry_list1_2=[]
    self.entry_list2_2=[]
    self.entr1=[]
    self.entr2=[]
    self.res=[]
    root.mainloop()
    
    def start(self):
        self.label1=Label(self.root,text="Αφαίρεση πινάκων παραδείγματα",font="Arial 12")
        self.label1.grid(row=1,column=1)
        self.label2=Label(self.root,text="Διάλεξε τις διαστάσεις του πρώτου πίνακα",font="Arial 12")
        self.label2.grid(row=2,column=1)
        self.s1=Label(self.root,text="X:",font="Arial 10")
        self.entry1=Entry(self.root,font="Arial 12",bg="#d9d9d9",width=5)
        self.entry1.grid(row=3,column=1)
        self.s2=Label(self.root,text="Y:",font="Arial 10")
        self.s2.grid(row=4,column=1)
        self.entry2=Entry(self.root,font="Arial 12",bg="#d9d9d9",width=5)
        self.entry2.grid(row=4,column=1)
        self.w2=Label(self.root,text="Διάλεξε τις διαστάσεις του δεύτερου πίνακα",font="Arial 12")
        self.w2.grid(row=5,column=1)
        self.s3=Label(self.root,text="X:",font="Arial 10")
        self.s3.grid(row=6,column=1)
        self.entry3=Entry(self.root,font="Arial 12",bg="#d9d9d9",width=5)
        self.entry3.grid(row=6,column=1)
        self.s4=Label(self.root,text="Y:",font="Arial 10")
        self.s4.grid(row=7,column=1)
        self.entry4=Entry(self.root,font="Arial 12",bg="#d9d9d9",width=5)
        self.entry4.grid(row=7,column=1)
        self.w3=Button(self.root,text="Σχηματισμός πινάκων ",font="Arial 12",bg="#d9d9d9",command=self.multi)
        self.w3.grid(row=8,column=1)
        self.returnbutton=Button(self.root,text="Αρχική",bg="#d9d9d9",command=self.hide_and_return)
        self.returnbutton.grid(ipadx=0,ipady=0,row=8)
    def check(self):
        num="0123456789"
        self.entry1_value=self.entry1.get()
        self.entry2_value=self.entry2.get()
        self.entry3_value=self.entry3.get()
        self.entry4_value=self.entry4.get()
        if self.entry1_value not in num or self.entry2_value not in num or self.entry3_value not in num or self.entry4_value not in num:
            root.withdraw()
            alertwindow=Toplevel()
            alertwindow.title("Προσοχή")
            alertlabel=Label(alertwindow,text="Παρακαλώ,βάλε μόνο ακαίρεους αριθμούς!")
            alertlabel.pack()
            alertbutton=Button(alertwindow,text="Ξαναπροσπάθησε",command=self.restart)
            alertbutton.pack()				
        elif self.entry1_value=="" or self.entry2_value=="" or self.entry3_value=="" or self.entry4_value=="":
            root.withdraw()
            empty_alertwindow=Toplevel()
            empty_alertwindow.title("Προσοχή")
            empty_alertlabel=Label(empty_alertwindow,text="Παρακαλω,συμπλήρωσε ολα τα πεδία")
            empty_alertlabel.pack()
            empty_alertbutton=Button(empty_alertwindow,text="Ξαναπροσπάθησε",command=self.restart)
            empty_alertbutton.pack()
        if self.entry1_value!=self.entry3_value or self.entry2_value!=self.entry4_value:
            self.answer=Label(self.root,text="Δεν μπορείς να προσθέσεις πίνακες διαφορετικών διαστάσεων",font="Arial 15")
            self.answer.grid(row=9,column=1)
            self.clear=Button(self.root,text="Ξαναπροσπάθησε",font="Arial 12",command=self.restart)
            self.clear.grid(row=11,column=1)     
        else:
            self.creation()
    def creation(self):
        global q
        entry1_value=self.entry1.get()
        entry2_value=self.entry2.get()
        entry3_value=self.entry3.get()
        entry4_value=self.entry4.get()
        entry1_value=int(entry1_value)
        entry2_value=int(entry2_value)
        
        d=entry1_value*entry2_value
        s=Label(self.root,text="1ος πίνακας:",font="Arial 15")
        s.grid(row=12,column=1)
        for i in range(entry1_value):
            for w in range(entry2_value):
                entry=Entry(self.root,font="Arial 12",bg="#d9d9d9",width=5)
                entry.grid(row=12+i,column=2+w)
                self.entries1.append(entry)
        s=Label(self.root,text="2ος πίνακας:",font="Arial 15")
        s.grid(row=15+entry1_value,column=1)
        for i in range(entry1_value):
            for w in range(entry2_value):
                entry=Entry(self.root,font="Arial 12",bg="#d9d9d9",width=5)
                entry.grid(row=15+entry1_value+i,column=2+w)
                self.entries2.append(entry)
                
        q=Button(self.root,text="Αποτέλεσμα",font="Arial 14",state='active',command=self.result_lock)
        q.grid(row=16+2*entry1_value,column=1)
        
        false_button=Button(self.root,text="Έκανα λάθος",font="Arial 14",command=self.refresh)
        false_button.grid(row=16+2*entry1_value,ipadx=0,ipady=0)
    def result(self):
        entry1_value=self.entry1.get()
        entry2_value=self.entry2.get()
        entry3_value=self.entry3.get()
        entry4_value=self.entry4.get()
        entry1_value=int(entry1_value)
        entry2_value=int(entry2_value)
        d=entry1_value*entry2_value
        for x in self.entries1:
            res1=x.get()
            res1=int(res1)
            self.entry_list1.append(res1)
        for t in self.entries2:
            res2=t.get()
            res2=int(res2)
            self.entry_list2.append(res2)
        entry_count1=0
        for i in range(entry1_value):
            self.entry_list1_2.append(list(self.entry_list1[entry_count1:entry_count1+entry2_value]))
            self.entry_list2_2.append(list(self.entry_list2[entry_count1:entry_count1+entry2_value]))
            entry_count1+=entry2_value
        for x in self.entry_list1_2:
            for i in range(entry2_value):
                self.entr1.append(x[i])
        for y in self.entry_list2_2:
            for i in range(entry2_value):
                self.entr2.append(y[i])
        r=Label(self.root,text="Εδώ είναι αναλυτικά οι πράξεις:",font="Arial 12")
        r.grid(row=20+2*entry1_value,column=1)
        for c in range(d):
            self.res.append(self.entr1[c]-self.entr2[c])
        entry_count2=0   
        for t in range(entry1_value):
            for i in range(entry2_value):
                f=Label(self.root,text="{}-{}={}".format(self.entr1[entry_count2],self.entr2[entry_count2],self.res[entry_count2]),font="Arial 12")
                f.grid(row=20+2*entry1_value+t,column=2+i)
                entry_count2+=1       
        e=Label(self.root,text="Ο πίνακας που προκύπτει είναι:",font="Arial 12")
        e.grid(row=25+2*entry1_value+d,column=1)
        entry_count3=0
        for t in range(entry1_value):
            for i in range(entry2_value):
                e=Label(self.root,text="{}".format(self.res[entry_count3]),font="Arial 12")
                e.grid(row=25+2*entry1_value+d+t,column=2+i)
                entry_count3+=1
        g=Button(self.root,text="Ξαναπροσπάθησε",font="Arial 12",command=self.refresh)
        g.grid(row=28+2*entry1_value+d+entry1_value,column=1)
        
    def refresh(self):
        self.root.destroy()
        myapp=MyApp(root)
        
    def restart(self,):
        python = sys.executable
        os.execl(python, python, * sys.argv)
        
    def multi(self):
        self.check()
        self.w3['state']=DISABLED
        
    def result_lock(self):
         self.result()
         q.configure(state="disabled")
         
    def hide_and_return(self):
        root.withdraw()
        subprocess.Popen('GUI.py', shell=True)
        


         
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It there any python error? I mean any def placement. Then, from the GUI code,i must use

import IMPORTED

then IMPORTED.start()