Overview

This is a Python implementation of the SOMA API specification for interacting with the Unified Single-cell Data Model.

Installation

TileDB-SOMA is available on PyPI and Conda, and can be installed via pip or mamba as indicated below.

python -m pip install tiledbsoma

mamba install -c conda-forge -c tiledb tiledbsoma-py

To install a specific version:

$ python -m pip install git+https://github.com/single-cell-data/[email protected]#subdirectory=apis/python

To update to the latest version:

$ python -m pip install --upgrade tiledbsoma

In case of illegal instruction errors when running on older architectures --- e.g. Opteron, non-AVX2 --- the issue is that the pre-compiled binaries available at Conda or PyPI aren't targeted for all processor variants over time. You can install from source, as shown below.

To see if this is the issue, on Linux:

grep avx2 /proc/cpuinfo

If this comes up empty for your system, you'll definitely need to build from source to run TileDB-SOMA on that system.

From source

• This requires tiledb (see ./setup.cfg for version), in addition to other dependencies in setup.cfg.
• Clone this repo
• cd into your checkout and then cd apis/python
• python -m pip install .
• Or, if you wish to modify the code and run it, python -m pip install -v -e .
• If the TileDB and TileDB-SOMA libraries are locally installed to a custom directory, such as /usr/local, set the path with environment variables TILEDB_PATH and TILEDBSOMA_PATH, TILEDB_PATH=/usr/local python -m pip install -v -e .
• Optionally, if you prefer, you can run that inside venv:

  $ python -m venv venv
  $ . ./venv/bin/activate
  $ python -m pip install -v -e .
  

• In either case:

  python -m pytest tests
  

Status

Please see https://github.com/single-cell-data/TileDB-SOMA/issues.

platform_config format

When accessing SOMA APIs, TileDB-specific settings can be configured with the platform_config parameter. The options accepted by TileDB SOMA are described here, using TypeScript interface syntax:

interface PlatformConfig {
  tiledb?: TDBConfig;
}

interface TDBConfig {
  create?: TDBCreateOptions;
}

interface TDBCreateOptions {
  dims?: { [dim: string]: TDBDimension };
  attrs?: { [attr: string]: TDBAttr };
  allows_duplicates?: bool;

  offsets_filters?: TDBFilter[];
  validity_filters?: TDBFilter[];

  capacity?: number;
  cell_order?: string;
  tile_order?: string;
}

interface TDBDimension {
  filters?: TDBFilter[];
  tile?: number;
}

interface TDBAttr {
  filters?: TDBFilter[];
}

/**
 * Either the name of a filter (in which case it will use
 * the default arguments) or a specification with filter args.
 */
type TDBFilter = string | TDBFilterSpec;

interface TDBFilterSpec {
  /** The name of the filter. */
  _name: string;
  /** kwargs that are passed when constructing the filter. */
  [kwarg: string]: any;
}

Information for developers

Please see the TileDB-SOMA wiki.