code: def test_mt_eq(mt, probe_locus):
      expr = mt.filter_rows(mt.locus == probe_locus)
      assert expr.n_partitions() == 1
      actual = expr.GT.collect()
      expected = [hl.Call([0, int(i in (13, 17))]) for i in range(100)]
      assert actual == expected
  
file_path: hail/hail/python/test/hail/extract_intervals/test_key_prefix.py
imports: import hail
label_desc: Use image node_id 3 for calling a global function with example usage: test_mt_eq(mt, probe_locus) without return types