Copia de múltiplos arquivos em Python 2.0

import os
import threading
import time
from tkinter import *
from tkinter.ttk import *
from tkinter import filedialog, messagebox

def start_copy():
    src_files = src_entry.get().split(";")  # Divide os arquivos selecionados
    dst_folder = dst_entry.get()

    # Verifica se nenhum arquivo foi selecionado
    if not src_files or src_files == ['']:
        messagebox.showwarning("Aviso", "É necessário escolher um ou mais arquivos para copiar.")
        return

    for src in src_files:
        if os.path.isfile(src):
            filename = os.path.basename(src)  # Obtém o nome do arquivo
            dst = os.path.join(dst_folder, filename)  # Define o caminho de destino

            GB = os.path.getsize(src) / (1024 * 1024 * 1024)
            copied = 0
            chunk_size = 1024 * 1024  # 1MB

            with open(src, 'rb') as fsrc, open(dst, 'wb') as fdst:
                while chunk := fsrc.read(chunk_size):
                    fdst.write(chunk)
                    copied += len(chunk) / (1024 * 1024 * 1024)
                    progress = (copied / GB) * 100
                    bar['value'] = progress
                    percent.set(f"{int(progress)}%")
                    text.set(f"{round(copied, 2)}/{round(GB, 2)} GB completos")
                    window.update_idletasks()

    # Exibe o alerta ao final da cópia
    messagebox.showinfo("Sucesso", "Cópia concluída com sucesso!")
    os.startfile(dst_folder)  # Abre a pasta de destino

def select_src():
    src_files = filedialog.askopenfilenames()  # Permite a seleção de múltiplos arquivos
    src_entry.delete(0, END)
    src_entry.insert(0, ";".join(src_files))  # Insere os arquivos selecionados, separados por ";"

def select_dst():
    dst_folder = filedialog.askdirectory()  # Escolhe a pasta de destino
    dst_entry.delete(0, END)
    dst_entry.insert(0, dst_folder)

def start_thread():
    threading.Thread(target=start_copy).start()

def show_about():
    messagebox.showinfo("Sobre", "Programa para cópia de múltiplos arquivos\n29/08/2024, Mizuno")

def exit_program():
    window.quit()

# Configuração da janela
window = Tk()
window.title("GigaCopy 2.0")
window.geometry('500x250')  # Mantém a altura da janela para 250 pixels e a altura em 500 pixels
window.eval('tk::PlaceWindow . center')

# Menu superior
menu_bar = Menu(window)
file_menu = Menu(menu_bar, tearoff=0)
file_menu.add_command(label="Sobre", command=show_about)
file_menu.add_separator()
file_menu.add_command(label="Sair", command=exit_program)
menu_bar.add_cascade(label="Arquivo", menu=file_menu)
window.config(menu=menu_bar)

# Variáveis para a barra de progresso
percent = StringVar()
text = StringVar()

# Layout em grid
Label(window, text="Origem:").grid(row=0, column=0, padx=10, pady=10, sticky=E)
src_entry = Entry(window, width=50)
src_entry.grid(row=0, column=1, padx=10, pady=10)
Button(window, text="...", command=select_src, width=3).grid(row=0, column=2, padx=10, pady=10)  # Largura reduzida

Label(window, text="Destino:").grid(row=1, column=0, padx=10, pady=10, sticky=E)
dst_entry = Entry(window, width=50)
dst_entry.grid(row=1, column=1, padx=10, pady=10)
Button(window, text="...", command=select_dst, width=3).grid(row=1, column=2, padx=10, pady=10)  # Largura reduzida

bar = Progressbar(window, orient=HORIZONTAL, length=400, mode='determinate')
bar.grid(row=2, column=0, columnspan=3, padx=10, pady=10)

percentLabel = Label(window, textvariable=percent).grid(row=3, column=0, columnspan=3)
taskLabel = Label(window, textvariable=text).grid(row=4, column=0, columnspan=3)

button = Button(window, text="Copiar", command=start_thread).grid(row=5, column=2, pady=10)

window.mainloop()