[Python-3000-checkins] r58880 - python/branches/py3k-pep3137/Doc/whatsnew/3.0.rst
guido.van.rossum
python-3000-checkins at python.org
Tue Nov 6 16:12:53 CET 2007
Author: guido.van.rossum
Date: Tue Nov 6 16:12:52 2007
New Revision: 58880
Modified:
python/branches/py3k-pep3137/Doc/whatsnew/3.0.rst
Log:
Update comments about bytes to align with PEP 3137.
Modified: python/branches/py3k-pep3137/Doc/whatsnew/3.0.rst
==============================================================================
--- python/branches/py3k-pep3137/Doc/whatsnew/3.0.rst (original)
+++ python/branches/py3k-pep3137/Doc/whatsnew/3.0.rst Tue Nov 6 16:12:52 2007
@@ -131,11 +131,6 @@
that if a file is opened using an incorrect mode or encoding, I/O
will likely fail.
-* Bytes aren't hashable, and don't support certain operations like
- ``b.lower()``, ``b.strip()`` or ``b.split()``.
- For the latter two, use ``b.strip(b" \t\r\n\f")`` or
- ``b.split(b" \t\r\n\f")``.
-
* ``map()`` and ``filter()`` return iterators. A quick fix is e.g.
``list(map(...))``, but a better fix is often to use a list
comprehension (especially when the original code uses ``lambda``).
@@ -158,13 +153,11 @@
* There is only one string type; its name is ``str`` but its behavior
and implementation are more like ``unicode`` in 2.x.
-* PEP 358: There is a new type, ``bytes``, to represent binary data
+* PEP 3137: There is a new type, ``bytes``, to represent binary data
(and encoded text, which is treated as binary data until you decide
to decode it). The ``str`` and ``bytes`` types cannot be mixed; you
must always explicitly convert between them, using the ``.encode()``
- (str -> bytes) or ``.decode()`` (bytes -> str) methods. Comparing a
- bytes and a str instance for equality raises a TypeError; this
- catches common mistakes.
+ (str -> bytes) or ``.decode()`` (bytes -> str) methods.
* PEP 3112: Bytes literals. E.g. b"abc".
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