class numbers.Complex Subclasses of this type describe complex numbers and include the operations that work on the built-in complex type. These are: conversions to complex and bool, real, imag, +, -, *, /, abs(), conjugate(), ==, and !=. All except - and != are abstract. real Abstract. Retrieves the real component of this number. imag Abstract. Retrieves the imaginary component of this number. abstractmethod conjugate() Abstract. Returns the complex conjugate. For example, (1+

exception NotImplementedError This exception is derived from RuntimeError. In user defined base classes, abstract methods should raise this exception when they require derived classes to override the method.

NotImplemented Special value which should be returned by the binary special methods (e.g. __eq__(), __lt__(), __add__(), __rsub__(), etc.) to indicate that the operation is not implemented with respect to the other type; may be returned by the in-place binary special methods (e.g. __imul__(), __iand__(), etc.) for the same purpose. Its truth value is true.

exception NotADirectoryError Raised when a directory operation (such as os.listdir()) is requested on something which is not a directory. Corresponds to errno ENOTDIR.

None The sole value of the type NoneType. None is frequently used to represent the absence of a value, as when default arguments are not passed to a function. Assignments to None are illegal and raise a SyntaxError.

class nntplib.NNTP_SSL(host, port=563, user=None, password=None, ssl_context=None, readermode=None, usenetrc=False[, timeout]) Return a new NNTP_SSL object, representing an encrypted connection to the NNTP server running on host host, listening at port port. NNTP_SSL objects have the same methods as NNTP objects. If port is omitted, port 563 (NNTPS) is used. ssl_context is also optional, and is a SSLContext object. Please read Security considerations for best practices. All other parameters

exception nntplib.NNTPTemporaryError Exception raised when a response code in the range 400–499 is received.

exception nntplib.NNTPReplyError Exception raised when an unexpected reply is received from the server.

exception nntplib.NNTPProtocolError Exception raised when a reply is received from the server that does not begin with a digit in the range 1–5.

exception nntplib.NNTPPermanentError Exception raised when a response code in the range 500–599 is received.