faiss 使用记录

import sys
import faiss
import numpy as np 
d = 64  
nb = 100
nq = 10
np.random.seed(1234)
xb = np.random.random((nb,d)).astype('float32')
print xb[:2]
xb[:, 0] += np.arange(nb).astype('float32') / 1000
#sys.exit()
print xb[:2]
xq = np.random.random((nq, d)).astype('float32')
xq[:, 0] += np.arange(nq).astype('float32') / 1000
index = faiss.IndexFlatL2(d) # buid the index
print (index.is_trained),"@@"
index.add(xb)
print index.ntotal  # 加入了多少行数据

k = 4
D,I = index.search(xb[:5],k)
print "IIIIIIIIIIII" 
print I
print "ddddddddd"
print D

print "#########"
index = faiss.IndexFlatIP(d)
index.add(xb)
k = 4
D,I = index.search(xb[:5],k)
print I
print "ddddddddd"
print D