faulthandler.unregister(signum) Unregister a user signal: uninstall the handler of the signum signal installed by register(). Return True if the signal was registered, False otherwise. Not available on Windows.

os.umask(mask) Set the current numeric umask and return the previous umask.

class shelve.Shelf(dict, protocol=None, writeback=False, keyencoding='utf-8') A subclass of collections.abc.MutableMapping which stores pickled values in the dict object. By default, version 3 pickles are used to serialize values. The version of the pickle protocol can be specified with the protocol parameter. See the pickle documentation for a discussion of the pickle protocols. If the writeback parameter is True, the object will hold a cache of all entries accessed and write them back to t

audioop.maxpp(fragment, width) Return the maximum peak-peak value in the sound fragment.

curses.typeahead(fd) Specify that the file descriptor fd be used for typeahead checking. If fd is -1, then no typeahead checking is done. The curses library does “line-breakout optimization” by looking for typeahead periodically while updating the screen. If input is found, and it is coming from a tty, the current update is postponed until refresh or doupdate is called again, allowing faster response to commands typed in advance. This function allows specifying a different file descriptor fo

formatmonth(theyear, themonth, w=0, l=0) Return a month’s calendar in a multi-line string. If w is provided, it specifies the width of the date columns, which are centered. If l is given, it specifies the number of lines that each week will use. Depends on the first weekday as specified in the constructor or set by the setfirstweekday() method.

os.getresuid() Return a tuple (ruid, euid, suid) denoting the current process’s real, effective, and saved user ids. Availability: Unix. New in version 3.2.

move(item, parent, index) Moves item to position index in parent‘s list of children. It is illegal to move an item under one of its descendants. If index is less than or equal to zero, item is moved to the beginning; if greater than or equal to the number of children, it is moved to the end. If item was detached it is reattached.

get_flags() Return a string specifying the flags that are currently set. If the message complies with the conventional format, the result is the concatenation in the following order of zero or one occurrence of each of 'R', 'O', 'D', 'F', and 'A'.

obj The underlying object of the memoryview: >>> b = bytearray(b'xyz') >>> m = memoryview(b) >>> m.obj is b True New in version 3.3.