How to use query atrr of array

[KazegamiKuon]

Hi, I'm currently calculating INDEL and SNP using scikit-allel

I read it as ZARR and make VariantChunkedTable

callset = zarr.open_group(path)
variants = allel.VariantChunkedTable(callset.variants)

SNP is where variant have ALT and REF which have only one nucleotide

How can I filter it with 'query'? I checked and see VariantChunkedTable have query atrr
variants.query

this is my variants when run code variants = allel.VariantChunkedTable(callset.variants)

Please advice me on how to process the right format for this function.
Thanks