ipaddress.ip_interface(address) Return an IPv4Interface or IPv6Interface object depending on the IP

urllib.request.build_opener([handler, ...]) Return an OpenerDirector instance, which chains the handlers in the

imaplib.ParseFlags(flagstr) Converts an IMAP4 FLAGS response to a tuple of individual flags.

wsgi_run_once The value to be used for the wsgi.run_once environment variable. It defaults to false in BaseHandler

NNTP.group(name) Send a GROUP command, where name is the group name. The group is selected as the current

Request.add_unredirected_header(key, header) Add a header that will not be added to a redirected request.

CookiePolicy.path_return_ok(path, request) Return false if cookies should not be returned, given cookie path.

version Variable that specifies the user agent of the opener object. To get

wsgiref.util.guess_scheme(environ) Return a guess for whether wsgi.url_scheme should be “http” or “https”, by checking

Telnet.read_sb_data() Return the data collected between a SB/SE pair (suboption begin/end). The callback should access these