failureException This class attribute gives the exception raised by the test method. If a test framework needs to use a specialized exception, possibly to carry additional information, it must subclass this exception in order to “play fair” with the framework. The initial value of this attribute is AssertionError.

platform.python_branch() Returns a string identifying the Python implementation SCM branch.

NNTP.descriptions(grouppattern) Send a LIST NEWSGROUPS command, where grouppattern is a wildmat string as specified in RFC 3977 (it’s essentially the same as DOS or UNIX shell wildcard strings). Return a pair (response, descriptions), where descriptions is a dictionary mapping group names to textual descriptions. >>> resp, descs = s.descriptions('gmane.comp.python.*') >>> len(descs) 295 >>> descs.popitem() ('gmane.comp.python.bio.general', 'BioPython discussion l

step The value of the step parameter (or 1 if the parameter was not supplied)

POP3.getwelcome() Returns the greeting string sent by the POP3 server.

SMTP.verify(address) Check the validity of an address on this server using SMTP VRFY. Returns a tuple consisting of code 250 and a full RFC 822 address (including human name) if the user address is valid. Otherwise returns an SMTP error code of 400 or greater and an error string. Note Many sites disable SMTP VRFY in order to foil spammers.

IMAP4.store(message_set, command, flag_list) Alters flag dispositions for messages in mailbox. command is specified by section 6.4.6 of RFC 2060 as being one of “FLAGS”, “+FLAGS”, or “-FLAGS”, optionally with a suffix of ”.SILENT”. For example, to set the delete flag on all messages: typ, data = M.search(None, 'ALL') for num in data[0].split(): M.store(num, '+FLAGS', '\\Deleted') M.expunge()

sys.setcheckinterval(interval) Set the interpreter’s “check interval”. This integer value determines how often the interpreter checks for periodic things such as thread switches and signal handlers. The default is 100, meaning the check is performed every 100 Python virtual instructions. Setting it to a larger value may increase performance for programs using threads. Setting it to a value <= 0 checks every virtual instruction, maximizing responsiveness as well as overhead. Deprecated si

exception ssl.SSLEOFError A subclass of SSLError raised when the SSL connection has been terminated abruptly. Generally, you shouldn’t try to reuse the underlying transport when this error is encountered. New in version 3.3.

reset() Reset the decoder to the initial state.