Pythonマルチプロセスはフォルダ内のファイルを再帰的にコピーします

import multiprocessing
import os
import re
import time

#       、       
SOUR_PATH = ""
DEST_PATH = ""
#            
SOUR_FILE_LIST = list()
SOUR_DIR_LIST = list()


def traverse(source_path):
    """        ，       、    

    :param source_path:         
    """
    if os.path.isdir(source_path):
        SOUR_DIR_LIST.append(source_path)
        for temp in os.listdir(source_path):
            new_source_path = os.path.join(source_path, temp)
            traverse(new_source_path)
    else:
        SOUR_FILE_LIST.append(source_path)


def copy_files(queue, sour_file, dest_file):
    """                

    :param queue:   ，      
    :param sour_file:
    :param dest_file:
    """
    # time.sleep(0.1)
    try:
        old_f = open(sour_file, "rb")
        new_f = open(dest_file, "wb")
    except Exception as ret:
        print(ret)
    else:
        content = old_f.read()
        new_f.write(content)
        old_f.close()
        new_f.close()

    queue.put(sour_file)


def main():
    source_path = input("              ：
")
    SOUR_PATH = source_path
    DEST_PATH = SOUR_PATH + "[  ]"
    # dest_path = input("          ")
    # DEST_PATH = dest_path
    print(">>>      ：", SOUR_PATH)
    print(">       ：", DEST_PATH)

    print("      ...")
    queue = multiprocessing.Manager().Queue()
    po = multiprocessing.Pool(5)

    traverse(source_path)

    print("       ...")
    for sour_dir in SOUR_DIR_LIST:
        dest_dir = sour_dir.replace(SOUR_PATH, DEST_PATH)

        try:
            os.mkdir(dest_dir)
        except Exception as ret:
            print(ret)
        else:
            print("\r      %s     " % DEST_PATH, end="")
    print()

    print("      ")
    for sour_file in SOUR_FILE_LIST:
        dest_file = sour_file.replace(SOUR_PATH, DEST_PATH)
        po.apply_async(copy_files, args=(queue, sour_file, dest_file))

    count_file = len(SOUR_FILE_LIST)
    count = 0
    while True:
        q_sour_file = queue.get()
        if q_sour_file in SOUR_FILE_LIST:
            count += 1
        rate = count * 100 / count_file
        print("\r      ： %.2f%% %s" % (rate, q_sour_file), end="")
        if rate >= 100:
            break

    print()
    ret = re.match(r".*\\([^\\]+)", SOUR_PATH)
    name = ret.group(1)
    print("    %s     " % name)


if __name__ == '__main__':
    main()