[Numpy-discussion] Resize Method for Numpy Array

Sturla Molden sturla@molden...
Thu Sep 24 17:32:09 CDT 2009


Robert Kern skrev:
> While this description is basically true of numpy arrays, I would
> caution you that every language has a different lexicon, and the same
> word can mean very different things in each. For example, Python lists
> are *not* linked lists; they are like C++'s std::vectors with a
> preallocation strategy to make appending cheap on average.
>   
In Java and .NET jargon, Python lists are array lists, not linked lists.

It is sad there is no "cons" or "llist" built-in type, something like:

   mycons = cons(car, cdr)
   mylist = llist(iterable)


Of course we can write [car, cdr] or (car, cdr) for making linked lists 
in pure Python (without having to define class types), but both have 
issues.The first is storage inefficient, the latter is not mutable.

Yes I know Guido left out linked lists for a purpose, so there is 
probably no use complaining on the Python ideas of Python dev lists...


S.M.


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