Analyst’s view#

Here, we’ll take an analysts-centric view of typical file transformations.

If exploring more generally, read this first: Bird’s eye view.

Hide code cell content 
# a lamindb instance containing Bionty schema
!lamin init --storage ./analysis-usecase --schema bionty

💡 creating schemas: core==0.45.5 bionty==0.29.6 
✅ saved: User(id='DzTjkKse', handle='testuser1', email='testuser1@lamin.ai', name='Test User1', updated_at=2023-08-17 17:36:08)
✅ saved: Storage(id='OslxJFdF', root='/home/runner/work/lamin-usecases/lamin-usecases/docs/analysis-usecase', type='local', updated_at=2023-08-17 17:36:08, created_by_id='DzTjkKse')

✅ loaded instance: testuser1/analysis-usecase
💡 did not register local instance on hub (if you want, call `lamin register`)


import lamindb as ln
import lnschema_bionty as lb

lb.settings.species = "human"  # globally set species
lb.settings.auto_save_parents = False

✅ loaded instance: testuser1/analysis-usecase (lamindb 0.50.7)

✅ set species: Species(id='uHJU', name='human', taxon_id=9606, scientific_name='homo_sapiens', updated_at=2023-08-17 17:36:10, bionty_source_id='RpUL', created_by_id='DzTjkKse')

ln.track()

💡 notebook imports: lamindb==0.50.7 lnschema_bionty==0.29.6

✅ saved: Transform(id='eNef4Arw8nNMz8', name='Analyst's view', short_name='analysis-flow', stem_id='eNef4Arw8nNM', version='0', type=notebook, updated_at=2023-08-17 17:36:10, created_by_id='DzTjkKse')

✅ saved: Run(id='5SZ3f3RqYqE2Ivs6PvDr', run_at=2023-08-17 17:36:10, transform_id='eNef4Arw8nNMz8', created_by_id='DzTjkKse')

Track cell types, tissues and diseases#

We fetch an example dataset from LaminDB that has a few cell type, tissue and disease annotations:

Hide code cell content 
adata = ln.dev.datasets.anndata_with_obs()

adata

AnnData object with n_obs × n_vars = 40 × 100
    obs: 'cell_type', 'cell_type_id', 'tissue', 'disease'

adata.var_names[:5]

Index(['ENSG00000000003', 'ENSG00000000005', 'ENSG00000000419',
       'ENSG00000000457', 'ENSG00000000460'],
      dtype='object')

adata.obs[["tissue", "cell_type", "disease"]].value_counts()

tissue  cell_type                disease                   
brain   my new cell type         Alzheimer disease             10
heart   hepatocyte               cardiac ventricle disorder    10
kidney  T cell                   chronic kidney disease        10
liver   hematopoietic stem cell  liver lymphoma                10
Name: count, dtype: int64

Processing the dataset#

To track our data transformation we create a new Transform of type “pipeline”:

transform = ln.Transform(
    name="Subset to T-cells and liver lymphoma", version="0.1.0", type="pipeline"
)

Set the current tracking to the new transform:

ln.track(transform)

✅ saved: Transform(id='dVeFFAc3E5iI5d', name='Subset to T-cells and liver lymphoma', stem_id='dVeFFAc3E5iI', version='0.1.0', type='pipeline', updated_at=2023-08-17 17:36:16, created_by_id='DzTjkKse')

✅ saved: Run(id='BEDoVkPAWV1r5vSUM3kr', run_at=2023-08-17 17:36:16, transform_id='dVeFFAc3E5iI5d', created_by_id='DzTjkKse')

Get a backed AnnData object#

file = ln.File.filter(key="mini_anndata_with_obs.h5ad").one()

adata = file.backed()
adata

💡 adding file ddj7dWRyFe17f84wz1At as input for run BEDoVkPAWV1r5vSUM3kr, adding parent transform eNef4Arw8nNMz8

AnnDataAccessor object with n_obs × n_vars = 40 × 100
  constructed for the AnnData object mini_anndata_with_obs.h5ad
    obs: ['_index', 'cell_type', 'cell_type_id', 'disease', 'tissue']
    var: ['_index']

adata.obs[["cell_type", "disease"]].value_counts()

cell_type                disease                   
T cell                   chronic kidney disease        10
hematopoietic stem cell  liver lymphoma                10
hepatocyte               cardiac ventricle disorder    10
my new cell type         Alzheimer disease             10
Name: count, dtype: int64

Subset dataset to specific cell types and diseases#

Create the subset:

subset_obs = adata.obs.cell_type.isin(["T cell", "hematopoietic stem cell"]) & (
    adata.obs.disease.isin(["liver lymphoma", "chronic kidney disease"])
)

adata_subset = adata[subset_obs]
adata_subset

AnnDataAccessorSubset object with n_obs × n_vars = 20 × 100
  obs: ['_index', 'cell_type', 'cell_type_id', 'disease', 'tissue']
  var: ['_index']

adata_subset.obs[["cell_type", "disease"]].value_counts()

cell_type                disease               
T cell                   chronic kidney disease    10
hematopoietic stem cell  liver lymphoma            10
Name: count, dtype: int64

This subset can now be registered:

file_subset = ln.File.from_anndata(
    adata_subset.to_memory(),
    key="subset/mini_anndata_with_obs.h5ad",
    var_ref=lb.Gene.ensembl_gene_id,
)

/opt/hostedtoolcache/Python/3.9.17/x64/lib/python3.9/site-packages/anndata/_core/anndata.py:1840: UserWarning: Variable names are not unique. To make them unique, call `.var_names_make_unique`.
  utils.warn_names_duplicates("var")

💡 file will be copied to default storage upon `save()` with key 'subset/mini_anndata_with_obs.h5ad'

💡 parsing feature names of X stored in slot 'var'

💡    using global setting species = human

✅    validated 99 Gene records on ensembl_gene_id: ENSG00000000003, ENSG00000000005, ENSG00000000419, ENSG00000000457, ENSG00000000460, ENSG00000000938, ENSG00000000971, ENSG00000001036, ENSG00000001084, ENSG00000001167, ENSG00000001460, ENSG00000001461, ENSG00000001497, ENSG00000001561, ENSG00000001617, ENSG00000001626, ENSG00000001629, ENSG00000001630, ENSG00000001631, ENSG00000002016, ...

✅    loaded FeatureSet(id='qMRbrkIflzSgiX2y2nTK', n=99, type='float', registry='bionty.Gene', hash='fHbDaAAmJse48vnUQh9C', updated_at=2023-08-17 17:36:13, created_by_id='DzTjkKse')

✅    linked: FeatureSet(id='qMRbrkIflzSgiX2y2nTK', n=99, type='float', registry='bionty.Gene', hash='fHbDaAAmJse48vnUQh9C', updated_at=2023-08-17 17:36:13, created_by_id='DzTjkKse')

💡 parsing feature names of slot 'obs'

✅    validated 3 Feature records on name: cell_type, disease, tissue

❗    did not validate 1 Feature record for name: cell_type_id

❗    ignoring non-validated features: cell_type_id

✅    linked: FeatureSet(id='3tHgq3DOXKaxLncynVzS', n=3, registry='core.Feature', hash='PFxelDIeK_B_8gDpZBUF', created_by_id='DzTjkKse')

file_subset.save()

✅ saved 2 feature sets for slots: ['var', 'obs']

✅ storing file 'NXaRYbrQASBAHwNeCPlQ' at 'subset/mini_anndata_with_obs.h5ad'

Add labels to features, all of them validate:

cell_types = lb.CellType.from_values(adata.obs.cell_type, lb.CellType.name)
tissues = lb.Tissue.from_values(adata.obs.tissue, lb.Tissue.name)
diseases = lb.Disease.from_values(adata.obs.disease, lb.Disease.name)

file_subset.add_labels(cell_types)
file_subset.add_labels(tissues)
file_subset.add_labels(diseases)
Hide code cell output 
✅ validated 4 CellType records on name: T cell, hematopoietic stem cell, hepatocyte, my new cell type

✅ validated 4 Tissue records on name: brain, heart, kidney, liver

✅ validated 4 Disease records on name: Alzheimer disease, cardiac ventricle disorder, chronic kidney disease, liver lymphoma

✅ linked labels 'T cell', 'hematopoietic stem cell', 'hepatocyte', 'my new cell type' to feature 'cell_type'

✅ linked labels 'brain', 'heart', 'kidney', 'liver' to feature 'tissue'

✅ linked labels 'Alzheimer disease', 'cardiac ventricle disorder', 'chronic kidney disease', 'liver lymphoma' to feature 'disease'

file_subset.describe()

💡 File(id=NXaRYbrQASBAHwNeCPlQ, key=subset/mini_anndata_with_obs.h5ad, suffix=.h5ad, accessor=AnnData, description=None, version=None, size=38992, hash=RgGUx7ndRplZZSmalTAWiw, hash_type=md5, created_at=2023-08-17 17:36:16.592836+00:00, updated_at=2023-08-17 17:36:16.592862+00:00)

Provenance:
    🗃️ storage: Storage(id='OslxJFdF', root='/home/runner/work/lamin-usecases/lamin-usecases/docs/analysis-usecase', type='local', updated_at=2023-08-17 17:36:08, created_by_id='DzTjkKse')
    🧩 transform: Transform(id='dVeFFAc3E5iI5d', name='Subset to T-cells and liver lymphoma', stem_id='dVeFFAc3E5iI', version='0.1.0', type='pipeline', updated_at=2023-08-17 17:36:16, created_by_id='DzTjkKse')
    👣 run: Run(id='BEDoVkPAWV1r5vSUM3kr', run_at=2023-08-17 17:36:16, transform_id='dVeFFAc3E5iI5d', created_by_id='DzTjkKse')
    👤 created_by: User(id='DzTjkKse', handle='testuser1', email='testuser1@lamin.ai', name='Test User1', updated_at=2023-08-17 17:36:08)
Features:
  var (X):
    🔗 index (99, bionty.Gene.id): ['NzkQQQSbOZgg', 'wjFIL2CM4eiP', 'wRvIIkUjF0ZQ', '6r1qNpEHgHPF', '5u7UhiT5yYyG'...]
  obs (metadata):
    🔗 cell_type (4, bionty.CellType): ['hepatocyte', 'hematopoietic stem cell', 'T cell', 'my new cell type']
    🔗 disease (4, bionty.Disease): ['cardiac ventricle disorder', 'chronic kidney disease', 'liver lymphoma', 'Alzheimer disease']
    🔗 tissue (4, bionty.Tissue): ['kidney', 'liver', 'heart', 'brain']

Examine data lineage#

Common questions that might arise are:

  • Which h5ad file is in the subset subfolder?

  • Which notebook ingested this file?

  • By whom?

  • And which file is its parent?

Let’s answer this using LaminDB:

Query a subsetted .h5ad file containing “hematopoietic stem cell” and “T cell” to learn which h5ad file is in the subset subfolder:

cell_types_bt_lookup = lb.CellType.lookup()

my_subset = ln.File.filter(
    suffix=".h5ad",
    key__startswith="subset",
    cell_types__in=[
        cell_types_bt_lookup.hematopoietic_stem_cell,
        cell_types_bt_lookup.t_cell,
    ],
).first()

my_subset.view_lineage()
https://d33wubrfki0l68.cloudfront.net/a784fc9382baf20688dd273ef1731e65fb42c3ae/93348/_images/1061a2ceddf83c24947229587f75a041f7634a58423b463ffd1d2f4dce90e121.svg
Hide code cell content 
!lamin delete --force analysis-usecase
!rm -r ./analysis-usecase

💡 deleting instance testuser1/analysis-usecase
✅     deleted instance settings file: /home/runner/.lamin/instance--testuser1--analysis-usecase.env

✅     instance cache deleted
✅     deleted '.lndb' sqlite file
❗     consider manually deleting your stored data: /home/runner/work/lamin-usecases/lamin-usecases/docs/analysis-usecase