I think all that's needed is to add new parameter port in __init__ and then add it to self.connect() as argument:
    def __init__(self, host='', port=0, user='', passwd='', acct='',
                 timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None, *,
				 encoding='utf-8'):
		self.encoding = encoding
        self.source_address = source_address
        self.timeout = timeout
        if host:
            self.connect(host, port)
            if user:
                self.login(user, passwd, acct)


Currently if I need to specify port, I have to do it like this:
with FTP() as ftp:
	ftp.connect(host, port)
	ftp.login(user, password)
	# my actions

I the port parameter would be added, I could use it like this:
with FTP(host, port, user, password) as ftp:
	# my actions

Thank you.

The only thing to consider is that connections are flakey, and the user might typically want to explicitly handle them in most cases. Therefore, it's a better API if the .connect() call appears in the user's code.

If anything, it might be better to create a new context manager called Auto FTP connection or something, and include default error handling behavior.

Have you discussed this idea in python- ideas?

> user might typically want to explicitly handle them in most cases.

*Explicitly handle exceptions

Well, if it's possible to connect to ftp server within __init__, I think that adding port parameter makes sense.
I mostly don't need to handle connect() and login() separately. All I need is to connect to ftp server and work with it. If there is some trouble with connection or login, the code still can't continue in this case.

I haven't discussed this idea there. I'm going to create a topic for it and I will add the link here.