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Diffstat (limited to 'Doc/whatsnew/3.0.rst')
| -rw-r--r-- | Doc/whatsnew/3.0.rst | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/Doc/whatsnew/3.0.rst b/Doc/whatsnew/3.0.rst index afe842d..8d6babd 100644 --- a/Doc/whatsnew/3.0.rst +++ b/Doc/whatsnew/3.0.rst @@ -131,11 +131,6 @@ changes to rarely used features.) 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 @@ Strings and Bytes * 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". |