Monitor remote FTP directory

by

If polling the server is an option:

from ftplib import FTP
from time import sleep

ftp = FTP('localhost')
ftp.login()

def changemon(dir="./"):
    ls_prev = set()

    while True:
        ls = set(ftp.nlst(dir))

        add, rem = ls-ls_prev, ls_prev-ls
        if add or rem: yield add, rem

        ls_prev = ls
        sleep(5)

for add, rem in changemon():
    print('\n'.join('+ %s' % i for i in add))
    print('\n'.join('- %s' % i for i in remove))

ftp.quit()

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