load file returns 0

[zhdeath]

I ran annoy 1.2.2 on Amazon EC2 with ubuntu linux 14.04, the file loading always return 0, any idea why? I would really appreciate your ideas.

from annoy import AnnoyIndex
f=50
i=AnnoyIndex(f)
i.load('items.tree')
0

PS: the file is small enough, several Kbs

[erikbern]

Yes seems like this
https://github.com/spotify/annoy/blob/master/src/annoylib.h#L368
is not respected here:
https://github.com/spotify/annoy/blob/master/src/annoymodule.cc#L108

[zhdeath]

Thanks for your reply.
My own computer which is also ubuntu 14.04 works fun.
Any idea what I should do with Amazon EC2?

i.get_item_vector(..) always returns [0,0..]

[erikbern]

hm get_item_vector shouldn't return 0... that's weird

[zhdeath]

it indeed is!
i.get_item_vector(18)
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

even i.get_nns_by_item(18, 10) works
But I need those vectors in my app

[erikbern]

That's strange. Let me add a unit test and try to repro

[erikbern]

I won't have time today unfortunately

[a1k0n]

@zhdeath can you post a snippet of code of how you're generating your annoy index, and how you're loading and using it?

the return value of load() isn't really of much consequence is it? I think it got changed to return 0 instead of true inadvertently to be more similar to POSIX return values, but it should still work.

[erikbern]

Not able to reproduce...see #72

[zhdeath]

@a1k0n Worked on these trivial code with 1.2.2 or 1.3.1

from annoy import AnnoyIndex
import random

f = 30
a = AnnoyIndex(f) # length of item vector

n = 1000  # number of vector
for i in xrange(n):
    v = []
    for z in xrange(f):
        v.append(random.gauss(0, 1))
    a.add_item(i, v)

a.build(-1)
a.save('test.tree')

b = AnnoyIndex(f)
b.load('test.tree')
print(i.get_item_vector(10))
print(b.get_nns_by_item(10, 10))

load() returns false, get_item_vector returns [0,0...]; but get_nss_by_item(10,10) works fun. Python is 2.7.6

I think it's version related.
With 1.0.5, load() returns true and get_item_vector() also works

[erikbern]

Hm it seems like the issue is some kind of integer casting.

The item vector looks like this for me:
[1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, -1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, -1, 0, 0, -1, 0]

[erikbern]

I pushed a breaking test to #72

Will now fix it