Vector elements are truncated to ints

[atqamar]

I did a sudo pip install of annoy on my OSX laptop and had the following unusual results:

>>> from annoy import AnnoyIndex
>>> import random
>>>
>>> f = 2
>>> t = AnnoyIndex(f)
>>> t.add_item(0, [0, 2.5])
0
>>> t.add_item(1, [3.5, 0])
0
>>> t.build(10)
0
>>> t.get_item_vector(0)
[0, 2]
>>> t.get_item_vector(1)
[3, 0]
>>> t.get_distance(0,1)
2.0

A few issues:

• A 0 is returned and printed by the add_item() and build() methods.
• When the items are queried, the vector that is returned has truncated elements.
• The get_distance() method doesn't return the proper angular distance, nor the distance under the assumption that the vector elements are truncated.

[erikbern]

This was fixed in #72 however I didn't publish a new version to pypi yet. Will do right away.

The problem was just returning data, it was still properly inserted etc

[erikbern]

I uploaded 1.3.2 to PyPI – can you verify that it works if you install the latest version from PyPI?

Also see #74 – silly PR but I can't push directly and/or merge my own stuff any more :(

[atqamar]

Great! get_item_vector() method works fine. And I was mistaken about the get_distance() method not working.

Is there a way to prevent 0 being returned by add_item()? It feels unnecessarily verbose:

>>> from annoy import AnnoyIndex
>>> import random
>>> f=2
>>> t = AnnoyIndex(f)
>>> t.add_item(0, [0, 2.5])
0
>>> t.add_item(1, [3.5, 0])
0
>>> t.build(10)
True
>>> t.get_item_vector(0)
[0.0, 2.5]
>>> t.get_item_vector(1)
[3.5, 0.0]

[erikbern]

Should be easy to fix the add_item return value so feel free to send a PR if you have time!