FTP

An FTP client class.

To create a connection, call the class using these arguments:
        host, user, passwd, acct, timeout, source_address, encoding

The first four arguments are all strings, and have default value ''.
The parameter ´timeout´ must be numeric and defaults to None if not
passed, meaning that no timeout will be set on any ftp socket(s).
If a timeout is passed, then this is now the default timeout for all ftp
socket operations for this instance.
The last parameter is the encoding of filenames, which defaults to utf-8.

Then use self.connect() with optional host and port argument.

To download a file, use ftp.retrlines('RETR ' + filename),
or ftp.retrbinary() with slightly different arguments.
To upload a file, use ftp.storlines() or ftp.storbinary(),
which have an open file as argument (see their definitions
below for details).
The download/upload functions first issue appropriate TYPE
and PORT or PASV commands.