diff --git a/Doc/library/email.parser.rst b/Doc/library/email.parser.rst index e0fcce8f0cbb8c..6a67bf7c8e555d 100644 --- a/Doc/library/email.parser.rst +++ b/Doc/library/email.parser.rst @@ -155,7 +155,7 @@ message body, instead setting the payload to the raw body. Read all the data from the binary file-like object *fp*, parse the resulting bytes, and return the message object. *fp* must support - both the :meth:`~io.IOBase.readline` and the :meth:`~io.IOBase.read` + both the :meth:`~io.IOBase.readline` and the :meth:`~io.BufferedIOBase.read` methods. The bytes contained in *fp* must be formatted as a block of :rfc:`5322` diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst index 3f1ec95005cbb5..27d5caa43f8f9e 100644 --- a/Doc/library/exceptions.rst +++ b/Doc/library/exceptions.rst @@ -221,7 +221,7 @@ The following exceptions are the exceptions that are usually raised. .. exception:: EOFError Raised when the :func:`input` function hits an end-of-file condition (EOF) - without reading any data. (Note: the :meth:`!io.IOBase.read` and + without reading any data. (Note: the :meth:`io.TextIOBase.read` and :meth:`io.IOBase.readline` methods return an empty string when they hit EOF.) diff --git a/Doc/library/os.rst b/Doc/library/os.rst index 95cb1b8178003c..721f18e6af7498 100644 --- a/Doc/library/os.rst +++ b/Doc/library/os.rst @@ -1297,8 +1297,8 @@ as internal buffering of data. This function is intended for low-level I/O. For normal usage, use the built-in function :func:`open`, which returns a :term:`file object` with - :meth:`~file.read` and :meth:`~file.write` methods (and many more). To - wrap a file descriptor in a file object, use :func:`fdopen`. + :meth:`~io.BufferedIOBase.read` and :meth:`~io.BufferedIOBase.write` methods. + To wrap a file descriptor in a file object, use :func:`fdopen`. .. versionchanged:: 3.3 Added the *dir_fd* parameter. @@ -1652,7 +1652,7 @@ or `the MSDN `_ on Windo descriptor as returned by :func:`os.open` or :func:`pipe`. To read a "file object" returned by the built-in function :func:`open` or by :func:`popen` or :func:`fdopen`, or :data:`sys.stdin`, use its - :meth:`~file.read` or :meth:`~file.readline` methods. + :meth:`~io.TextIOBase.read` or :meth:`~io.IOBase.readline` methods. .. versionchanged:: 3.5 If the system call is interrupted and the signal handler does not raise an @@ -1887,7 +1887,7 @@ or `the MSDN `_ on Windo descriptor as returned by :func:`os.open` or :func:`pipe`. To write a "file object" returned by the built-in function :func:`open` or by :func:`popen` or :func:`fdopen`, or :data:`sys.stdout` or :data:`sys.stderr`, use its - :meth:`~file.write` method. + :meth:`~io.TextIOBase.write` method. .. versionchanged:: 3.5 If the system call is interrupted and the signal handler does not raise an @@ -4326,7 +4326,7 @@ to be ignored. The current process is replaced immediately. Open file objects and descriptors are not flushed, so if there may be data buffered on these open files, you should flush them using - :func:`sys.stdout.flush` or :func:`os.fsync` before calling an + :func:`~io.IOBase.flush` or :func:`os.fsync` before calling an :func:`exec\* ` function. The "l" and "v" variants of the :func:`exec\* ` functions differ in how diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst index 3bc1448136ea4d..2587b12918bba0 100644 --- a/Doc/reference/datamodel.rst +++ b/Doc/reference/datamodel.rst @@ -1417,12 +1417,28 @@ also :func:`os.popen`, :func:`os.fdopen`, and the :meth:`~socket.socket.makefile` method of socket objects (and perhaps by other functions or methods provided by extension modules). +File objects implement common methods, listed below, to simplify usage in +generic code. They are expected to be :ref:`context-managers`. + The objects ``sys.stdin``, ``sys.stdout`` and ``sys.stderr`` are initialized to file objects corresponding to the interpreter's standard input, output and error streams; they are all open in text mode and therefore follow the interface defined by the :class:`io.TextIOBase` abstract class. +.. method:: file.read(size=-1, /) + + Retrieve up to *size* data from the file. As a convenience if *size* is + unspecified or -1 retrieve all data available. + +.. method:: file.write(data, /) + + Store *data* to the file. + +.. method:: file.close() + + Flush any buffers and close the underlying file. + Internal types --------------