exception(timeout=None) Return the exception raised by the call. If the call hasn’t yet completed then this method will wait up to timeout seconds. If the call hasn’t completed in timeout seconds, then a concurrent.futures.TimeoutError will be raised. timeout can be an int or float. If timeout is not specified or None, there is no limit to the wait time. If the future is cancelled before completing then CancelledError will be raised. If the call completed without raising, None is returned.

audioop.cross(fragment, width) Return the number of zero crossings in the fragment passed as an argument.

email.header.decode_header(header) Decode a message header value without converting the character set. The header value is in header. This function returns a list of (decoded_string, charset) pairs containing each of the decoded parts of the header. charset is None for non-encoded parts of the header, otherwise a lower case string containing the name of the character set specified in the encoded string. Here’s an example: >>> from email.header import decode_header >>> decod

smtp_state Holds the current state of the channel. This will be either COMMAND initially and then DATA after the client sends a “DATA” line.

write(data) Write some data bytes to the transport. This method does not block; it buffers the data and arranges for it to be sent out asynchronously.

size_diff Difference of total size of memory blocks in bytes between the old and the new snapshots (int): 0 if the memory blocks have been allocated in the new snapshot.

with_netmask A string representation of the network, with the mask in net mask notation.

coroutine read(n=-1) Read up to n bytes. If n is not provided, or set to -1, read until EOF and return all read bytes. If the EOF was received and the internal buffer is empty, return an empty bytes object. This method is a coroutine.

load_module(name=None) Concrete implementation of importlib.abc.Loader.load_module() where specifying the name of the module to load is optional.

socket.getsockname() Return the socket’s own address. This is useful to find out the port number of an IPv4/v6 socket, for instance. (The format of the address returned depends on the address family — see above.)