Merge #15543: glossary entry for and 'universal newlines', and links to it.

Patch by Chris Jerdonek.

Doc/glossary.rst

@@ -706,6 +706,13 @@ Glossary
       object has a type.  An object's type is accessible as its
       :attr:`__class__` attribute or can be retrieved with ``type(obj)``.
 
+   universal newlines
+      A manner of interpreting text streams in which all of the following are
+      recognized as ending a line: the Unix end-of-line convention ``'\n'``,
+      the Windows convention ``'\r\n'``, and the old Macintosh convention
+      ``'\r'``.  See :pep:`278` and :pep:`3116`, as well as
+      :func:`str.splitlines` for an additional use.
+
    view
       The objects returned from :meth:`dict.keys`, :meth:`dict.values`, and
       :meth:`dict.items` are called dictionary views.  They are lazy sequences

Doc/library/csv.rst

@@ -46,6 +46,9 @@ Module Contents
 The :mod:`csv` module defines the following functions:
 
 
+.. index::
+   single: universal newlines; csv.reader function
+
 .. function:: reader(csvfile, dialect='excel', **fmtparams)
 
    Return a reader object which will iterate over lines in the given *csvfile*.
@@ -486,4 +489,5 @@ done::
 .. [1] If ``newline=''`` is not specified, newlines embedded inside quoted fields
    will not be interpreted correctly, and on platforms that use ``\r\n`` linendings
    on write an extra ``\r`` will be added.  It should always be safe to specify
-   ``newline=''``, since the csv module does its own (universal) newline handling.
+   ``newline=''``, since the csv module does its own
+   (:term:`universal <universal newlines>`) newline handling.

Doc/library/functions.rst

@@ -819,7 +819,7 @@ are always available.  They are listed here in alphabetical order.
    ``'b'``   binary mode
    ``'t'``   text mode (default)
    ``'+'``   open a disk file for updating (reading and writing)
-   ``'U'``   universal newline mode (for backwards compatibility; should
+   ``'U'``   universal newlines mode (for backwards compatibility; should
              not be used in new code)
    ========= ===============================================================
 
@@ -874,14 +874,17 @@ are always available.  They are listed here in alphabetical order.
    used.  Any other error handling name that has been registered with
    :func:`codecs.register_error` is also valid.
 
-   *newline* controls how universal newlines works (it only applies to text
-   mode).  It can be ``None``, ``''``, ``'\n'``, ``'\r'``, and ``'\r\n'``.  It
-   works as follows:
+   .. index::
+      single: universal newlines; open() built-in function
+
+   *newline* controls how :term:`universal newlines` mode works (it only
+   applies to text mode).  It can be ``None``, ``''``, ``'\n'``, ``'\r'``, and
+   ``'\r\n'``.  It works as follows:
 
    * When reading input from the stream, if *newline* is ``None``, universal
      newlines mode is enabled.  Lines in the input can end in ``'\n'``,
      ``'\r'``, or ``'\r\n'``, and these are translated into ``'\n'`` before
-     being returned to the caller.  If it is ``''``, universal newline mode is
+     being returned to the caller.  If it is ``''``, universal newlines mode is
      enabled, but line endings are returned to the caller untranslated.  If it
      has any of the other legal values, input lines are only terminated by the
      given string, and the line ending is returned to the caller untranslated.

Doc/library/importlib.rst

@@ -290,12 +290,16 @@ ABC hierarchy::
         (e.g. built-in module).  :exc:`ImportError` is raised if loader cannot
         find the requested module.
 
+        .. index::
+           single: universal newlines; importlib.abc.InspectLoader.get_source method
+
     .. method:: get_source(fullname)
 
         An abstract method to return the source of a module. It is returned as
-        a text string with universal newlines. Returns ``None`` if no
-        source is available (e.g. a built-in module). Raises :exc:`ImportError`
-        if the loader cannot find the module specified.
+        a text string using :term:`universal newlines`, translating all
+        recognized line separators into ``'\n'`` characters.  Returns ``None``
+        if no source is available (e.g. a built-in module). Raises
+        :exc:`ImportError` if the loader cannot find the module specified.
 
     .. method:: is_package(fullname)
 

Doc/library/io.rst

@@ -768,16 +768,20 @@ Text I/O
    sequences) can be used.  Any other error handling name that has been
    registered with :func:`codecs.register_error` is also valid.
 
+   .. index::
+      single: universal newlines; io.TextIOWrapper class
+
    *newline* controls how line endings are handled.  It can be ``None``,
    ``''``, ``'\n'``, ``'\r'``, and ``'\r\n'``.  It works as follows:
 
-   * When reading input from the stream, if *newline* is ``None``, universal
-     newlines mode is enabled.  Lines in the input can end in ``'\n'``,
-     ``'\r'``, or ``'\r\n'``, and these are translated into ``'\n'`` before
-     being returned to the caller.  If it is ``''``, universal newline mode is
-     enabled, but line endings are returned to the caller untranslated.  If it
-     has any of the other legal values, input lines are only terminated by the
-     given string, and the line ending is returned to the caller untranslated.
+   * When reading input from the stream, if *newline* is ``None``,
+     :term:`universal newlines` mode is enabled.  Lines in the input can end in
+     ``'\n'``, ``'\r'``, or ``'\r\n'``, and these are translated into ``'\n'``
+     before being returned to the caller.  If it is ``''``, universal newlines
+     mode is enabled, but line endings are returned to the caller untranslated.
+     If it has any of the other legal values, input lines are only terminated
+     by the given string, and the line ending is returned to the caller
+     untranslated.
 
    * When writing output to the stream, if *newline* is ``None``, any ``'\n'``
      characters written are translated to the system default line separator,
@@ -843,10 +847,13 @@ Text I/O
       output.close()
 
 
+.. index::
+   single: universal newlines; io.IncrementalNewlineDecoder class
+
 .. class:: IncrementalNewlineDecoder
 
-   A helper codec that decodes newlines for universal newlines mode.  It
-   inherits :class:`codecs.IncrementalDecoder`.
+   A helper codec that decodes newlines for :term:`universal newlines` mode.
+   It inherits :class:`codecs.IncrementalDecoder`.
 
 
 Performance

Doc/library/stdtypes.rst

@@ -1349,10 +1349,13 @@ functions based on regular expressions.
    ``'  1  2   3  '.split(None, 1)`` returns ``['1', '2   3  ']``.
 
 
+.. index::
+   single: universal newlines; str.splitlines method
+
 .. method:: str.splitlines([keepends])
 
    Return a list of the lines in the string, breaking at line boundaries.
-   This method uses the universal newlines approach to splitting lines.
+   This method uses the :term:`universal newlines` approach to splitting lines.
    Line breaks are not included in the resulting list unless *keepends* is
    given and true.
 

Doc/library/subprocess.rst

@@ -285,9 +285,12 @@ default values. The arguments that are most commonly needed are:
    :data:`STDOUT`, which indicates that the stderr data from the child
    process should be captured into the same file handle as for *stdout*.
 
+   .. index::
+      single: universal newlines; subprocess module
+
    If *universal_newlines* is ``True``, the file objects *stdin*, *stdout*
-   and *stderr* will be opened as text streams with universal newlines support,
-   using the encoding returned by :func:`locale.getpreferredencoding`.
+   and *stderr* will be opened as text streams in :term:`universal newlines`
+   mode using the encoding returned by :func:`locale.getpreferredencoding`.
    For *stdin*, line ending characters ``'\n'`` in the input will be converted
    to the default line separator :data:`os.linesep`.  For *stdout* and
    *stderr*, all line endings in the output will be converted to ``'\n'``.
@@ -508,7 +511,7 @@ functions.
    .. _side-by-side assembly: http://en.wikipedia.org/wiki/Side-by-Side_Assembly
 
    If *universal_newlines* is ``True``, the file objects *stdin*, *stdout*
-   and *stderr* are opened as text files with universal newlines support, as
+   and *stderr* are opened as text streams in universal newlines mode, as
    described above in :ref:`frequently-used-arguments`.
 
    If given, *startupinfo* will be a :class:`STARTUPINFO` object, which is

Doc/library/zipfile.rst

@@ -197,14 +197,18 @@ ZipFile Objects
    Return a list of archive members by name.
 
 
+.. index::
+   single: universal newlines; zipfile.ZipFile.open method
+
 .. method:: ZipFile.open(name, mode='r', pwd=None)
 
-   Extract a member from the archive as a file-like object (ZipExtFile). *name* is
-   the name of the file in the archive, or a :class:`ZipInfo` object. The *mode*
-   parameter, if included, must be one of the following: ``'r'`` (the  default),
-   ``'U'``, or ``'rU'``. Choosing ``'U'`` or  ``'rU'`` will enable universal newline
-   support in the read-only object. *pwd* is the password used for encrypted files.
-   Calling  :meth:`open` on a closed ZipFile will raise a  :exc:`RuntimeError`.
+   Extract a member from the archive as a file-like object (ZipExtFile). *name*
+   is the name of the file in the archive, or a :class:`ZipInfo` object. The
+   *mode* parameter, if included, must be one of the following: ``'r'`` (the
+   default), ``'U'``, or ``'rU'``. Choosing ``'U'`` or  ``'rU'`` will enable
+   :term:`universal newlines` support in the read-only object.  *pwd* is the
+   password used for encrypted files.  Calling  :meth:`open` on a closed
+   ZipFile will raise a  :exc:`RuntimeError`.
 
    .. note::
 

Doc/whatsnew/2.3.rst

@@ -366,6 +366,9 @@ Under MacOS, :func:`os.listdir` may now return Unicode filenames.
 .. ======================================================================
 
 
+.. index::
+   single: universal newlines; What's new
+
 PEP 278: Universal Newline Support
 ==================================
 
@@ -376,12 +379,12 @@ mark the ends of lines in text files.  Unix uses the linefeed (ASCII character
 10), MacOS uses the carriage return (ASCII character 13), and Windows uses a
 two-character sequence of a carriage return plus a newline.
 
-Python's file objects can now support end of line conventions other than the one
-followed by the platform on which Python is running. Opening a file with the
-mode ``'U'`` or ``'rU'`` will open a file for reading in universal newline mode.
-All three line ending conventions will be translated to a ``'\n'`` in the
-strings returned by the various file methods such as :meth:`read` and
-:meth:`readline`.
+Python's file objects can now support end of line conventions other than the
+one followed by the platform on which Python is running. Opening a file with
+the mode ``'U'`` or ``'rU'`` will open a file for reading in :term:`universal
+newlines` mode.  All three line ending conventions will be translated to a
+``'\n'`` in the strings returned by the various file methods such as
+:meth:`read` and :meth:`readline`.
 
 Universal newline support is also used when importing modules and when executing
 a file with the :func:`execfile` function.  This means that Python modules can

Doc/whatsnew/2.4.rst

@@ -411,6 +411,9 @@ error streams will be.  You can provide a file object or a file descriptor, or
 you can use the constant ``subprocess.PIPE`` to create a pipe between the
 subprocess and the parent.
 
+.. index::
+   single: universal newlines; What's new
+
 The constructor has a number of handy options:
 
 * *close_fds* requests that all file descriptors be closed before running the
@@ -424,7 +427,7 @@ The constructor has a number of handy options:
 * *preexec_fn* is a function that gets called before the child is started.
 
 * *universal_newlines* opens the child's input and output using Python's
-  universal newline feature.
+  :term:`universal newlines` feature.
 
 Once you've created the :class:`Popen` instance,  you can call its :meth:`wait`
 method to pause until the subprocess has exited, :meth:`poll` to check if it's

Doc/whatsnew/2.5.rst

@@ -1338,13 +1338,17 @@ complete list of changes, or look through the SVN logs for all the details.
 
   .. XXX need to provide some more detail here
 
+  .. index::
+     single: universal newlines; What's new
+
 * The :mod:`fileinput` module was made more flexible. Unicode filenames are now
   supported, and a *mode* parameter that defaults to ``"r"`` was added to the
-  :func:`input` function to allow opening files in binary or universal-newline
-  mode.  Another new parameter, *openhook*, lets you use a function other than
-  :func:`open`  to open the input files.  Once you're iterating over  the set of
-  files, the :class:`FileInput` object's new :meth:`fileno` returns the file
-  descriptor for the currently opened file. (Contributed by Georg Brandl.)
+  :func:`input` function to allow opening files in binary or :term:`universal
+  newlines` mode.  Another new parameter, *openhook*, lets you use a function
+  other than :func:`open`  to open the input files.  Once you're iterating over
+  the set of files, the :class:`FileInput` object's new :meth:`fileno` returns
+  the file descriptor for the currently opened file. (Contributed by Georg
+  Brandl.)
 
 * In the :mod:`gc` module, the new :func:`get_count` function returns a 3-tuple
   containing the current collection counts for the three GC generations.  This is

Doc/whatsnew/2.6.rst

@@ -1071,9 +1071,12 @@ the :mod:`io` module:
   The :class:`BytesIO` class supports reading, writing, and seeking
   over an in-memory buffer.
 
+  .. index::
+     single: universal newlines; What's new
+
 * :class:`TextIOBase`: Provides functions for reading and writing
   strings (remember, strings will be Unicode in Python 3.0),
-  and supporting universal newlines.  :class:`TextIOBase` defines
+  and supporting :term:`universal newlines`.  :class:`TextIOBase` defines
   the :meth:`readline` method and supports iteration upon
   objects.