Java Iterables

[nournia]

Programming in python based on lists and other collections. I think it's better to convert them instantly. I mean you should reduce switching between python and JVM. Take a look at this example:

while iterator.hasNext():
    print iterator.next()

That needs switching to JVM for each item. But there isn't any need if you convert Java Iterable to python list. Or this one with same performance issue:

for i in range(arr.length):
    print list[i]

[tito]

I don't agreed. The whole goal of iterator is to prevent to not duplicate the list memory, and instead, get the item one by one. If we add magic to use python list, the memory used would be at mimimun x2.

However, if you have the choice of using a list (if the initial object has a toList(), toArray(), or something like that), then use it!