[python] Query stats are missing [backlog]

[johnkerl]

TileDB-SOMA-Py / TIleDB-Py repro script:

#!/usr/bin/env python

import tiledbsoma
import tiledb
import sys

uri = '/var/p'
if len(sys.argv) == 2:
    uri = sys.argv[1]

# ----------------------------------------------------------------
with tiledbsoma.Experiment.open(uri) as exp:
    tiledb.stats_enable()
    tiledb.stats_reset()
    print(exp.obs.read().concat())
    print("SOBS WAY 1")
    tiledb.stats_dump()
    print("SOBS WAY 2")
    ctx = exp.context.tiledb_ctx
    ctx.get_stats()

# ----------------------------------------------------------------
with tiledbsoma.Experiment.open(uri) as exp:
    with tiledb.open(exp.obs.uri) as A:
        tiledb.stats_enable()
        tiledb.stats_reset()
        print(A.df[:])
        print("TOBS WAY")
        tiledb.stats_dump()

I've run this with tiledbsoma 1.5.0, 1.4.4, and 1.2.0 -- same results.

Output (using 1.2.0 for example): https://gist.github.com/johnkerl/915b184fc5cf22e59ebd77012cbb355b

Key point: dowork appears with tiledb.open and query, but not via tiledbsoma.

cc @nguyenv @bkmartinjr @KiterLuc

Here is a TileDB-SOMA-R gist showing that when we do a query using TileDB-SOMA-R, we do get dowork which signals the presence of query stats: https://gist.github.com/johnkerl/862a4749231274e38ffca2f76014f616

[johnkerl]

I tried the repro above and dowork stats are now present, and compatible, both ways