SPTAG Module has no Attribute AnnIndex

Loadnf sptag indexes into the memory

index = SPTAG.AnnIndex.Load('sptag_index')

batch_size = 20

Local index test on the vector search

index = SPTAG.AnnIndex.Load('sptag_index')
results = []
for val in embeddings:

result = index.SearchWithMetaData(val, batch_size) # Search k=3 nearest vectors for query vector q
results.append([str(r).replace("b\'","").replace("\\n\'","") for r in result[2]])

So, whenever we load SPTAG and calling AnnIndex attribute with it throws an error.

AttributeError Traceback (most recent call last)
in
1 # Loadnf sptag indexes into the memory
----> 2 index = SPTAG.AnnIndex.Load('sptag_index')

AttributeError: module 'SPTAG' has no attribute 'AnnIndex'

Start by reproducing the Python example with SPTAG.AnnIndex.Load('sptag_index'), then inspect how the Python module exports index classes and whether AnnIndex is available in the installed build. Done means the documented loading call works or the supported Python API and required build conditions are clearly identified.