python实现类似ftp传输文件的网络程序示例

                print msg4
                continue
        else:
            continue

if __name__ == '__main__':
    #Default 127.0.0.1
    HOST = str(raw_input('Server IP: ')).strip()
    #Defautl 9889
    PORT = int(raw_input('Server PORT: '))
    ADDR = (HOST,PORT)
    BUFSIZ = 8192

    s = socket(AF_INET,SOCK_STREAM)
    try:
        s.connect(ADDR)
    except :
        pass

    if auth() == 'error':
        print 'Connection refused.'
    else:
        switch()