Error

[PierreHao]

After pip install panns, i try run the code from panns import *

create an index of Euclidean distance

p = PannsIndex(dimension=100, metric='euclidean')

generate a 1000 x 100 dataset

for i in xrange(1000):
v = gaussian_vector(100)
p.add_vector(v)

build an index of 50 trees and save to a file

p.build(50)
p.save('test.idx')

after run this code, there are 1 idx and a npy, that' ok, but when i run the code repeat, all the things are deleted, and the directory is deleted also, what's the problem?