On Sat, Apr 15, 2006 at 10:32:21AM +, Talin wrote:
> 2a) One particularly useful variation of *list (again, one which I have
> brought up before, as have others), is the "yield *" syntax. The primary
> use case is for chained generators, that is a generator that is yielding
> the output of mult
On Mon, Apr 17, 2006 at 05:40:19PM -0500, Ian Bicking wrote:
> Raymond Hettinger wrote:
> > -1 on making strings non-iterable. The cure is worse than the disease.
> > I'm also -1 on almost all proposals of this kind. IMHO, the first cut
> > of Py3000 should be directed at subtracting the cruf
On Tue, Apr 18, 2006 at 09:41:20PM -0400, Edward C. Jones wrote:
> Wild idea.
>
> When I was a newbie, I repeatedly make the mistake of writing
>
> alist = alist.sort()
>
> I suggest a singleton object "UseForbidden" ("Py_UseForbidden" in C).
> "UseForbidden" can be used only to return from a f
On Wed, Apr 19, 2006 at 03:07:50PM -0400, Tim Peters wrote:
> and it matters. I noted this in public in 1999, after Neal
> Schemenauer tried replacing all of Python's gc with BDW mark-sweep,
> and reported:
>
> I started with Sam Rushing's patch and modified it for Python
> 1.5.2c. To m
On Fri, Apr 28, 2006 at 08:09:24AM -0400, Greg Wilson wrote:
> OK, OK, just so I can get it off my chest:
>
> - introduce '@' as a prefix operator meaning 'freeze'.
>
> - [1, 2, 3] is a mutable sequence (our old friend the list)
>
> - {1, 2, 3} is a mutable set
>
> - @{1, 2, 3} is an immutable
On Mon, Nov 13, 2006 at 01:44:10PM -0500, George Sakkis wrote:
> As a proof of concept, I provide below a sample implementation of how
> I imagine this type to work (also posted in the original c.l.py.
> thread):
>
> from itertools import chain, tee, islice
>
> import __builtin__
> _builtin_iter =
On Thu, Feb 15, 2007 at 09:37:27PM -0800, Chris Rebert wrote:
> Okay, in light of Guido's comments, alternate idea:
>
> We require all default values to be hash()-able, thus reasonably
> ensuring their immutability.
Offhand, that's a pretty arbitrary restriction- default __hash__
for objects is
On Sat, Jul 07, 2007 at 01:08:15PM -0400, Terry Reedy wrote:
>
> "Nick Coghlan" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> | Georg is correct. A list comprehension like:
> |
> | [(x * y) for x in seq1 for y in seq2]
> |
> | expands to the following in 2.x (% prefixes the comp
