sentinel A numeric handle of a system object which will become “ready” when the process ends. You can use this value if you want to wait on several events at once using multiprocessing.connection.wait(). Otherwise calling join() is simpler. On Windows, this is an OS handle usable with the WaitForSingleObject and WaitForMultipleObjects family of API calls. On Unix, this is a file descriptor usable with primitives from the select module. New in version 3.3.

socket.recvfrom_into(buffer[, nbytes[, flags]]) Receive data from the socket, writing it into buffer instead of creating a new bytestring. The return value is a pair (nbytes, address) where nbytes is the number of bytes received and address is the address of the socket sending the data. See the Unix manual page recv(2) for the meaning of the optional argument flags; it defaults to zero. (The format of address depends on the address family — see above.)

list_folders() Return a list of the names of all folders.

exception GeneratorExit Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

True The true value of the bool type. Assignments to True are illegal and raise a SyntaxError.

exception dbm.gnu.error Raised on dbm.gnu-specific errors, such as I/O errors. KeyError is raised for general mapping errors like specifying an incorrect key.

operator.__delitem__(a, b) Remove the value of a at index b.

to_eng_string(context=None) Convert to a string, using engineering notation if an exponent is needed. Engineering notation has an exponent which is a multiple of 3. This can leave up to 3 digits to the left of the decimal place and may require the addition of either one or two trailing zeros. For example, this converts Decimal('123E+1') to Decimal('1.23E+3').

calendar.firstweekday() Returns the current setting for the weekday to start each week.

to_integral_value(rounding=None, context=None) Round to the nearest integer without signaling Inexact or Rounded. If given, applies rounding; otherwise, uses the rounding method in either the supplied context or the current context.