on a raw byte stream (RawIOBase). Its
subclasses, BufferedWriter, BufferedReader, and BufferedRWPair buffer
streams that are readable, writable, and both respectively.
BufferedRandom provides a buffered interface to random access
streams. BytesIO is a simple stream of in-memory bytes.

Another IOBase subclass, TextIOBase, deals with the encoding and decoding
of streams into text. TextIOWrapper, which extends it, is a buffered text
interface to a buffered raw stream (`BufferedIOBase`). Finally, StringIO
is an in-memory stream for text.

Argument names are not part of the specification, and only the arguments
of open() are intended to be used as keyword arguments.

data:

DEFAULT_BUFFER_SIZE

   An int containing the default buffer size used by the module's buffered
   I/O classes. open() uses the file's blksize (as obtained by os.stat) if
   possible.
zëGuido van Rossum <guido@python.org>, Mike Verdone <mike.verdone@gmail.com>, Mark Russell <mark.russell@zen.co.uk>, Antoine Pitrou <solipsis@pitrou.net>, Amaury Forgeot d'Arc <amauryfa@gmail.com>, Benjamin Peterson <benjamin@python.org>ÚBlockingIOErrorÚ