Código de Python - Acortador de URL

#!/usr/bin/env python

# -*- coding: utf-8 -*-

from tkinter import *

from tkinter import messagebox, filedialog

import pyshorteners as ps

import time

import qrcode

import pyperclip

from urllib.parse import urlparse

import threading

import os

class shortener:

    def __init__(self):

        self.app = Tk()

        self.app.title("URL Shortener")

        self.app.geometry("1038x370")

        self.app.configure(background="PaleGreen2")

        current_dir = StringVar()

        current_dir.set(os.getcwd())

        self.url = StringVar()

        Label(self.app,text="URL Shortener",bg="PaleGreen2",width=32,fg="white",font=('Arial', 40, 'bold')).place(x=4,y=50)

        self.ShrtStatus = Label(self.app,bg="PaleGreen2",fg="white",width=103,font=('Arial', 13, 'bold'))

        self.ShrtStatus.place(x=1,y=113)

        Entry(self.app,textvariable=current_dir,width=172).place(x=0,y=0)

        self.url_visor=Entry(self.app,textvariable=self.url,width=37,font='Arial, 33')

        self.url_visor.place(x=20,y=150)

        Button(self.app,text="SHORTEN",height=3,width=12,command=self.init_task).place(x=925,y=150)

        Button(self.app,text="COPY",width=12,command=self.copy).place(x=925,y=235)

        Button(self.app,text="CLEAR",width=12,command=self.clear).place(x=819,y=235)

        Button(self.app,text="IMPORT URL",width=12,command=self.init_task2).place(x=713,y=235)

        Button(self.app,text="CREATE QR",width=20,command=self.save_qr).place(x=20,y=235)

        self.app.mainloop()

    def shorten_URL(self):

        if self.is_url(self.url_visor.get())==True:

            try:

                self.ShrtStatus.configure(text="shorting your URL...")

                url = self.url_visor.get()

                self.url.set(ps.Shortener().tinyurl.short(url))

                self.ShrtStatus.configure(text="task completed :)")

            except Exception as e:

                messagebox.showwarning("UNEXPECTED ERROR",str(e))

                self.clear()

        else:

            messagebox.showwarning("EMPTY/INVALID URL","Enter a valid URL.")

            self.clear()

    def import_url(self):

        self.clear()

        messagebox.showinfo("copy and paste","Copy and paste your URL")

        ultcop = pyperclip.paste().strip()

        while True:

            time.sleep(0.1)

            copy = pyperclip.paste().strip()

            if copy != ultcop:

                self.url.set(copy)

                self.ultcop = copy

                break

    def copy(self):

        if self.url_visor.get() != "":

            pyperclip.copy(self.url_visor.get())

            messagebox.showinfo("COPIED","Copied to clipboard.")

    def save_qr(self):

        if self.is_url(self.url_visor.get())==True:

            new_file = filedialog.asksaveasfilename(initialdir="/",initialfile="urlQR",

                                                    title="SAVE AS",defaultextension=".png",)

            if new_file != "":

                qr = qrcode.make(self.url_visor.get())

                qr.save(new_file)

    def clear(self):

        self.url.set("")

        self.ShrtStatus.configure(text="")

    def is_url(self,url):

        try:

            result = urlparse(url)

            return all([result.scheme, result.netloc])

        except ValueError:

            return False

    def init_task(self):

        t = threading.Thread(target=self.shorten_URL)

        t.start()

    def init_task2(self):

        t2 = threading.Thread(target=self.import_url)

        t2.start()

if __name__=="__main__":

    shortener()