move pdfs

#!/usr/bin/python
# -*- coding: utf-8 -*-

from os import chdir, system, environ
from glob import glob
from shutil import move
from time import sleep

def copy_pdfs():
    dir_pdfs_default = environ['HOME'] + "/Documents"
    chdir(dir_pdfs_default)
    pdfs = list_pdfs()
    for pdf in pdfs:
        move(pdf, dir_pdfs_default)
    return True

def list_pdfs():
    dir_pdfs = environ['HOME'] + '/Downloads/'
    chdir(dir_pdfs)
    pdfs = []
    for f_pdf in glob('*.pdf'):
        pdfs.append(dir_pdfs+f_pdf)
    return pdfs

def main():
    pdfs = list_pdfs()
    if len(pdfs) > 1:
        system('paplay /home/reni/Desktop/python/pdf.ogg')
        system('paplay /home/reni/Desktop/python/starting.ogg')
        sleep(2.5)
        system('paplay /home/reni/Desktop/python/encontred.ogg')
        copy_pdfs()
    else:
        system('paplay /home/reni/Desktop/python/notfound.ogg')
        quit(0)

main()