On 2/27/2016 4:44 AM, Steven D'Aprano wrote:
On Sat, 27 Feb 2016 07:55 pm, Terry Reedy wrote:
In other words, when that doc says *list*, it means a *list*.
"To create a heap, use a list initialized to [], or you can transform a
populated list into a heap via function heapify()."
[...]
"A heap must be an instance of *list* (and not a subclass thereof). To
create a heap, start with [] or transform an existing list into a heap
via function heapify()."
I think that's a sad decision. heapq ought to be able to handle any list
subclass, not just actual lists. Preferably it ought to handle duck-typed
lists too, anything with a list-like interface. It is okay if the optimized
C version only works with actual lists, and falls back to a slower Python
version for anything else.
Propose that on the tracker, after checking previous issues.
--
Terry Jan Reedy
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