【脚本语言系列】关于PythonWeb访问ftplib，你需要知道的事

如何使用ftplib

# -*- coding:utf-8 -*-
#
import string
from ftplib import FTP
bufsize = 1024
def Get(filename):
command = "RETR "+filename
ftp.retrbinary(command, open(filename, 'wb').write, bufsize)
print 'Download Successfully'
def Put(filename):
command = 'STOR '+filename
filehandler = open(filename, 'rb')
ftp.storbinary(command, filehandler, bufsize)
filehandler.close()
print 'Upload Successfully'
def PWD():
print ftp.pwd()
def Size(filename):
print ftp.size(filename)
def Help():
print '''
============================================
Simple Python FTP
============================================
cd          Enter Folder
delete      Delete Folder
dir         Get Current Folder List
get         Download Files
help        help
mkdir       Create Folder
put         Upload Files
pwd         Get Current Document
rename      rename Folder
rmdir       remove Folder
size        Get the size of Files
'''
server = raw_input('Please input the server of FTP server:')
ftp = FTP(server)
username = raw_input('Please input the user_name:')
password = raw_input('Please input the password:')
ftp.login(username, password)
print ftp.getwelcome()
actions = {"dir":ftp.dir, "pwd":PWD, "cd":ftp.cwd, 'get':Get,
"put":Put, "help":Help, "rmdir":ftp.rmd,
"mkdir":ftp.mkd, "delete":ftp.delete,
"size":Size, "rename":ftp.rename}
while True:
print 'pyftp>',
cmds = raw_input()
cmd = string.split(cmds)
try:
if len(cmd) == 1:
if string.lower(cmd[0]) == "quit":
break
else:
actions[string.lower(cmd[0])]()
elif len(cmd) == 2:
actions[string.lower(cmd[0])](cmd[1])
elif len(cmd) == 3:
actions[string.lower(cmd[0])](cmd[1], cmd[2])
else:
print "Input Error"
except:
print "Cmd Error"
ftp.quit()

什么是ftplib