[Python-3000] bytes regular expression?

[Guido van Rossum]

A quick temporary hack is to use buffer(b'abc') instead. (buffer() is
so incredibly broken that it lets you hash() even if the underlying
object is broken. :-)

The correct solution is to fix the re library to avoid using hash()
directly on the underlying data type altogether; that never had sound
semantics (as proven by the buffer() hack above).

--Guido

On 8/8/07, Victor Stinner <victor.stinner at haypocalc.com> wrote:
> Hi,
>
> Since Python 3000 regular expressions are now Unicode by default, how can I
> use bytes regex? Very simplified example of my problem:
>   import re
>   print( re.sub("(.)", b"[\\1]", b'abc') )
>
> This code fails with exception:
>   File "(...)/py3k-struni/Lib/re.py", line 241, in _compile_repl
>      p = _cache_repl.get(key)
>   TypeError: unhashable type: 'bytes'
>
> Does "frozen bytes type" (immutable) exist to be able to use a cache?
>
> Victor Stinner aka haypo
> http://hachoir.org/
> _______________________________________________
> Python-3000 mailing list
> Python-3000 at python.org
> http://mail.python.org/mailman/listinfo/python-3000
> Unsubscribe: http://mail.python.org/mailman/options/python-3000/guido%40python.org
>


-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)