diff options
| -rw-r--r-- | Doc/whatsnew/3.5.rst | 45 |
1 files changed, 42 insertions, 3 deletions
diff --git a/Doc/whatsnew/3.5.rst b/Doc/whatsnew/3.5.rst index 868b6b2..d795a11 100644 --- a/Doc/whatsnew/3.5.rst +++ b/Doc/whatsnew/3.5.rst @@ -64,12 +64,12 @@ For full details, see the :source:`Misc/NEWS` file. Summary -- Release highlights ============================= -.. This section singles out the most important changes in Python 3.3. +.. This section singles out the most important changes in Python 3.5. Brevity is key. New syntax features: -* None yet. +* :pep:`465`, a new matrix multiplication operator: ``a @ b``. New library modules: @@ -78,7 +78,8 @@ New library modules: New built-in features: -* None yet. +* ``bytes % args``, ``bytearray % args``: :pep:`461` - Adding ``%`` formatting + to bytes and bytearray Implementation improvements: @@ -114,6 +115,44 @@ Please read on for a comprehensive list of user-facing changes. PEP written by Carl Meyer +PEP 461 - Adding % formatting to bytes and bytearray +---------------------------------------------------- + +This PEP proposes adding % formatting operations similar to Python 2's ``str`` +type to :class:`bytes` and :class:`bytearray`. + +Examples:: + + >>> b'Hello %s!' % b'World' + b'Hello World!' + >>> b'x=%i y=%f' % (1, 2.5) + b'x=1 y=2.500000' + +Unicode is not allowed for ``%s``, but it is accepted by ``%a`` (equivalent of +``repr(obj).encode('ascii', 'backslashreplace')``):: + + >>> b'Hello %s!' % 'World' + Traceback (most recent call last): + File "<stdin>", line 1, in <module> + TypeError: %b requires bytes, or an object that implements __bytes__, not 'str' + >>> b'price: %a' % '10€' + b"price: '10\\u20ac'" + +.. seealso:: + + :pep:`461` -- Adding % formatting to bytes and bytearray + + +PEP 465 - A dedicated infix operator for matrix multiplication +-------------------------------------------------------------- + +This PEP proposes a new binary operator to be used for matrix multiplication, +called ``@``. (Mnemonic: ``@`` is ``*`` for mATrices.) + +.. seealso:: + + :pep:`465` -- A dedicated infix operator for matrix multiplication + PEP 471 - os.scandir() function -- a better and faster directory iterator ------------------------------------------------------------------------- |