How to use IndexHNSWFlat.search_level_0 in python

[devjiang]

I want to use IndexHNSWFlat.search_level_0 in python, but some issues are encountered.
My code snippet is as follows:

import numpy as np
import faiss
index = faiss.read_index(hnsw_index_file, 0)
xq = np.random.normal(0, 1, [3, 128])
nearest = np.array([ [0], [0], [0] ], dtype=np.int32)
nearest_d = np.array([ [1000.0], [1000.0], [1000.0] ], dtype=np.float32)
distances = np.zeros(3, dtype=np.float32).reshape(3, 1)
labels = np.zeros(3, dtype=np.int64).reshape(3, 1)
res = index.search_level_0(n=3, x=xq, k=1, nearest=faiss.swig_ptr(nearest), nearest_d=faiss.swig_ptr(nearest_d), distances=faiss.swig_ptr(distances), labels=faiss.swig_ptr(labels))

The error is: TypeError: Wrong number or type of arguments for overloaded function 'IndexHNSW_search_level_0'.

So, How can the arguments be passed to the function? Thanks~