python NGT

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Install

Python binding with pybind11 (ngtpy) is installed as follows.

pip3 install ngt

You can install the python bindings from source code. You MUST install the NGT library according to the README before installing the python bindings as follows.

cd NGT_ROOT/python
pip3 install .

Please note that the search speed of the ngtpy packages from PyPI is slower than that of the ngtpy that is built on your computer so that the package can be run on older CPUs.

Documents

ngtpy (pybind11) reference

Simple samples

ngtpy (pybind11)

ngtpy(pybind11) can reduce the processing times than ngt(ctypes). It is more effective especially for the short search time.

  import ngtpy
  import random


  dim = 10
  nb = 100
  vectors = [[random.random() for _ in range(dim)] for _ in range(nb)]
  query = vectors[0]
  
  ngtpy.create(b"tmp", dim)
  index = ngtpy.Index(b"tmp")
  index.batch_insert(vectors)
  index.save()

  results = index.search(query, 3)
  for i, (id, distance) in enumerate(results) :
      print(str(i) + ": " + str(id) + ", " + str(distance))
      object = index.get_object(id)
      print(object)

See also sample.py.

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Credits

Author: Masajiro Iwasaki

License

Apache License Version 2.0

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