[Python-Dev] Counting collisions for the win
steve at pearwood.info
Sat Jan 21 01:53:31 CET 2012
Guido van Rossum wrote:
> On Fri, Jan 20, 2012 at 11:51 AM, Donald Stufft <donald.stufft at gmail.com>wrote:
>> On Friday, January 20, 2012 at 2:36 PM, Tres Seaver wrote:
>> On 01/20/2012 02:04 PM, Donald Stufft wrote:
>> Even if a MemoryException is raised I believe that is still a
>> fundamental change in the documented contract of dictionary API.
>> How so? Dictionary inserts can *already* raise that error.
>> Because it's raising it for a fundamentally different thing. "You have
>> plenty of memory, but we decided to add an arbitrary limit that has nothing
>> to do with memory and pretend you are out of memory anyways".
> Actually due to fragmentation that can already happen.
Whether you have run out of total memory, or a single contiguous block, it is
still a memory error.
An arbitrary limit on collisions is not a memory error. If we were designing
this API from scratch, would anyone propose using MemoryError for "you have
reached a limit on collisions"? It has nothing to do with memory. Using
MemoryError for something which isn't a memory error is ugly.
How about RuntimeError?
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