sysconfig.get_config_vars(*args) With no arguments, return a dictionary of all configuration variables relevant for the current platform. With arguments, return a list of values that result from looking up each argument in the configuration variable dictionary. For each argument, if the value is not found, return None.

addresses A possibly empty tuple of Address objects representing the addresses in the group.

os.dup(fd) Return a duplicate of file descriptor fd. The new file descriptor is non-inheritable. On Windows, when duplicating a standard stream (0: stdin, 1: stdout, 2: stderr), the new file descriptor is inheritable. Changed in version 3.4: The new file descriptor is now non-inheritable.

tarfile.open(name=None, mode='r', fileobj=None, bufsize=10240, **kwargs) Return a TarFile object for the pathname name. For detailed information on TarFile objects and the keyword arguments that are allowed, see TarFile Objects. mode has to be a string of the form 'filemode[:compression]', it defaults to 'r'. Here is a full list of mode combinations: mode action 'r' or 'r:*' Open for reading with transparent compression (recommended). 'r:' Open for reading exclusively without compression. 'r

Element.getAttributeNode(attrname) Return the Attr node for the attribute named by attrname.

dbm.whichdb(filename) This function attempts to guess which of the several simple database modules available — dbm.gnu, dbm.ndbm or dbm.dumb — should be used to open a given file. Returns one of the following values: None if the file can’t be opened because it’s unreadable or doesn’t exist; the empty string ('') if the file’s format can’t be guessed; or a string containing the required module name, such as 'dbm.ndbm' or 'dbm.gnu'.

remainder_near(x, y) Returns x - y * n, where n is the integer nearest the exact value of x / y (if the result is 0 then its sign will be the sign of x).

multiprocessing.cpu_count() Return the number of CPUs in the system. May raise NotImplementedError. See also os.cpu_count()

Unpacker.unpack_fstring(n) Unpacks and returns a fixed length string. n is the number of characters expected. Padding with null bytes to guaranteed 4 byte alignment is assumed.

os.getresgid() Return a tuple (rgid, egid, sgid) denoting the current process’s real, effective, and saved group ids. Availability: Unix. New in version 3.2.