JezK
Edit File: io.py
"""The io module provides the Python interfaces to stream handling. The builtin open function is defined in this module. At the top of the I/O hierarchy is the abstract base class IOBase. It defines the basic interface to a stream. Note, however, that there is no separation between reading and writing to streams; implementations are allowed to raise an IOError if they do not support a given operation. Extending IOBase is RawIOBase which deals simply with the reading and writing of raw bytes to a stream. FileIO subclasses RawIOBase to provide an interface to OS files. BufferedIOBase deals with buffering 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. """ # New I/O library conforming to PEP 3116. __author__ = ("Guido 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>") __all__ = ["BlockingIOError", "open", "IOBase", "RawIOBase", "FileIO", "BytesIO", "StringIO", "BufferedIOBase", "BufferedReader", "BufferedWriter", "BufferedRWPair", "BufferedRandom", "TextIOBase", "TextIOWrapper", "UnsupportedOperation", "SEEK_SET", "SEEK_CUR", "SEEK_END"] import _io import abc from _io import (DEFAULT_BUFFER_SIZE, BlockingIOError, UnsupportedOperation, open, FileIO, BytesIO, StringIO, BufferedReader, BufferedWriter, BufferedRWPair, BufferedRandom, IncrementalNewlineDecoder, TextIOWrapper) OpenWrapper = _io.open # for compatibility with _pyio # for seek() SEEK_SET = 0 SEEK_CUR = 1 SEEK_END = 2 # Declaring ABCs in C is tricky so we do it here. # Method descriptions and default implementations are inherited from the C # version however. class IOBase(_io._IOBase): __metaclass__ = abc.ABCMeta __doc__ = _io._IOBase.__doc__ class RawIOBase(_io._RawIOBase, IOBase): __doc__ = _io._RawIOBase.__doc__ class BufferedIOBase(_io._BufferedIOBase, IOBase): __doc__ = _io._BufferedIOBase.__doc__ class TextIOBase(_io._TextIOBase, IOBase): __doc__ = _io._TextIOBase.__doc__ RawIOBase.register(FileIO) for klass in (BytesIO, BufferedReader, BufferedWriter, BufferedRandom, BufferedRWPair): BufferedIOBase.register(klass) for klass in (StringIO, TextIOWrapper): TextIOBase.register(klass) del klass