Python - example - Tkinter

#coding=latin-1

from __future__ import print_function # use print() in Python 2
try:
    import Tkinter as tk # Python 2
except:
    import tkinter as tk # Python 3


class Principal():

    def __init__(self):

        self.you_shall_not_pass = ['de', 'o','a', 'do', 'da', 'em', 'e', 'que', 'ser', 'um', 'uns', 'uma', 'umas', 'por','para', 'nao', 'com', 'se', 'ter', 'seu', 'sua', 'seus', 'suas','como',
 'estar','sim', '-', 'os', 'as', 'no', 'ao', 'na', '.', 'mas', 'era', 'lhe', 'ele', 'mais','dos', 'ela', 'ele', 'muito','ja','eu','sobre','das','tinha','quando','sem','la','num',
 'depois','entao','nos','esta','ainda','numa','onde','foi','tao','estava','entre','dum','so','grande','disse','todo','pela','agora','pelo','me','toda', 'havia', 'tudo', 'ou','ate',
 'ha','nem','logo','ia','sempre','duas','tambem','mesmo','ali','aos','tem','fora','aquele','tu','meu','duma','aquela','e,','outra','essa','outro','isto','esse','assim','quem','ele,',
 'apenas','todos','pouco','nas','diante','ai','sob','tinham','coisas','aqui','pois','porque','ir','te','nunca','depois','lado','tres','mao','vez','sim,','desde','isso','fazer','este']

        self.livro1 = 'erro'
        self.livro2 = 'batata.txt'

        self.dicionario1 = {}
        self.dicionario2 = {}


    def read_dictionario(self, filename):

        result = {}

        lista = open(filename, 'r', encoding='latin-1').read().split()

        for word in lista:
            if word in self.you_shall_not_pass:
                continue
            if word in result:
                result[word] += 1
            else:
                result[word] = 1

        return result


    def palavras_repetidas(self):

        self.dicionario1 = self.read_dictionario(self.livro1)

        sorted_dict = [(k,v) for v,k in sorted([(v,k) for k,v in self.dicionario1.items()], reverse=True)]

        with open('teste.txt', 'w') as f:
            for item in sorted_dict:
                f.write(str(item))

        print(self.dicionario1)

        return self.dicionario1


    def palavras_totais(self, filename):

        f = open(filename, 'r').read().split()

        total = 0

        for word in f:
            total += 1
        #total = len(f)

        print(total)

        return total


    def comparar(self):

        self.dicionario2 = self.read_dictionario(self.livro2)
        print(self.dicionario2)

        result = []

        limit = 10

        for key in self.dicionario1:
            if key in self.dicionario2:
                if (self.dicionario1[key] > limit and self.dicionario2[key] > limit):
                    txt = '{}: {}, {}'.format(key, self.dicionario1[key], self.dicionario2[key])
                    result.append(txt)

        return result


class MainWindow():

    def __init__(self):

        self.master = tk.Tk()
        self.master.title('App')

        self.e1 = tk.Entry(self.master)
        self.e1.pack()

        self.e2 = tk.Entry(self.master)
        self.e2.pack()

        self.b1 = tk.Button(self.master, text='Submeter', command=self.submeter)
        self.b1.pack()

        self.b2 = tk.Button(self.master, text='Comparar', command=self.comparar)
        self.b2.pack()

        self.txt1 = tk.Text(self.master)
        self.txt1.pack()

        self.txt2 = tk.Text(self.master)
        self.txt2.pack()

        self.master.minsize(width=666, height=666)
        self.master.maxsize(width=666, height=666)

        self.principal = Principal()

    def run(self):
        self.master.mainloop()

    def submeter(self):
        self.principal.livro1 = self.e1.get() +'.txt'

        result = self.principal.palavras_repetidas()

        for line in result.items():
            self.txt1.insert('end', line)
            self.txt1.insert('end', "\n")

    def comparar(self):
        print("MainWindow: comparar")

        self.principal.livro1 = self.e1.get() +'.txt'
        self.principal.livro2 = self.e2.get() +'.txt'

        result = self.principal.comparar()

        for line in result:
            self.txt2.insert('end', line)
            self.txt2.insert('end', "\n")

# ---------------------------------------------------------------------

MainWindow().run()