exception ipaddress.NetmaskValueError(ValueError) Any value error related to the netmask.

class telnetlib.Telnet(host=None, port=0[, timeout]) Telnet represents a connection to a Telnet server. The instance

class urllib.request.HTTPErrorProcessor Process HTTP error responses.

network_address

SMTP.docmd(cmd, args='') Send a command cmd to the server. The optional argument args is simply concatenated

urllib.request.url2pathname(path) Convert the path component path from a percent-encoded URL to the local syntax for

SMTP.has_extn(name) Return

exception smtplib.SMTPConnectError Error occurred during establishment of a connection with the server.

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

open_unknown(fullurl, data=None) Overridable interface to open unknown URL types.