error_output(environ, start_response) This method is a WSGI application to generate an error page for the user. It is only invoked if an error occurs before headers are sent to the client. This method can access the current error information using sys.exc_info(), and should pass that information to start_response when calling it (as described in the “Error Handling” section of PEP 3333). The default implementation just uses the error_status, error_headers, and error_body attributes to genera

itertools.zip_longest(*iterables, fillvalue=None) Make an iterator that aggregates elements from each of the iterables. If the iterables are of uneven length, missing values are filled-in with fillvalue. Iteration continues until the longest iterable is exhausted. Roughly equivalent to: class ZipExhausted(Exception): pass def zip_longest(*args, **kwds): # zip_longest('ABCD', 'xy', fillvalue='-') --> Ax By C- D- fillvalue = kwds.get('fillvalue') counter = len(args) - 1

bytes.splitlines(keepends=False) bytearray.splitlines(keepends=False) Return a list of the lines in the binary sequence, breaking at ASCII line boundaries. This method uses the universal newlines approach to splitting lines. Line breaks are not included in the resulting list unless keepends is given and true. For example: >>> b'ab c\n\nde fg\rkl\r\n'.splitlines() [b'ab c', b'', b'de fg', b'kl'] >>> b'ab c\n\nde fg\rkl\r\n'.splitlines(keepends=True) [b'ab c\n', b'\n', b'de fg

plistlib.readPlist(pathOrFile) Read a plist file. pathOrFile may be either a file name or a (readable and binary) file object. Returns the unpacked root object (which usually is a dictionary). This function calls load() to do the actual work, see the documentation of that function for an explanation of the keyword arguments. Note Dict values in the result have a __getattr__ method that defers to __getitem_. This means that you can use attribute access to access items of these dictionaries.

is_multicast

class io.BytesIO([initial_bytes]) A stream implementation using an in-memory bytes buffer. It inherits BufferedIOBase. The buffer is discarded when the close() method is called. The optional argument initial_bytes is a bytes-like object that contains initial data. BytesIO provides or overrides these methods in addition to those from BufferedIOBase and IOBase: getbuffer() Return a readable and writable view over the contents of the buffer without copying them. Also, mutating the view will

recv_bytes([maxlength]) Return a complete message of byte data sent from the other end of the connection as a string. Blocks until there is something to receive. Raises EOFError if there is nothing left to receive and the other end has closed. If maxlength is specified and the message is longer than maxlength then OSError is raised and the connection will no longer be readable. Changed in version 3.3: This function used to raise IOError, which is now an alias of OSError.

socket.get_inheritable() Get the inheritable flag of the socket’s file descriptor or socket’s handle: True if the socket can be inherited in child processes, False if it cannot. New in version 3.4.

Cookie.has_nonstandard_attr(name) Return true if cookie has the named cookie-attribute.

get_key(fileobj) Return the key associated with a registered file object. This returns the SelectorKey instance associated to this file object, or raises KeyError if the file object is not registered.