doc/python: use dirigera as example for specifying dependencies

Dependencies can belong to multiple arguments, for example if something is both a build time requirement & a runtime dependency.

The following example shows which arguments are given to [`buildPythonPackage`](#buildpythonpackage-function) in

order to build [`datashape`](https://github.com/blaze/datashape).

order to build [`dirigera`](https://github.com/Leggin/dirigera).

```nix

{

  lib,

  buildPythonPackage,

  fetchPypi,

  # build dependencies

  setuptools,

  # dependencies

  numpy,

  multipledispatch,

  python-dateutil,

  # tests

  fetchFromGitHub,

  pydantic,

  pytestCheckHook,

  requests,

  setuptools,

  websocket-client,

}:

buildPythonPackage (finalAttrs: {

  pname = "datashape";

  version = "0.4.7";

  pname = "dirigera";

  version = "1.2.6";

  pyproject = true;

  src = fetchPypi {

    inherit (finalAttrs) pname version;

    hash = "sha256-FLLvdm1MllKrgTGC6Gb0k0deZeVYvtCCLji/B7uhong=";

  src = fetchFromGitHub {

    owner = "Leggin";

    repo = "dirigera";

    tag = "v${finalAttrs.version}";

    hash = "sha256-5pfzmaIkIEtxDtkhG1lOLSTjWahEDgQKLJKbAG5rBjE=";

  };

  build-system = [ setuptools ];

  dependencies = [

    multipledispatch

    numpy

    python-dateutil

    pydantic

    requests

    websocket-client

  ];

  nativeCheckInputs = [ pytestCheckHook ];

  pythonImportsCheck = [ "dirigera" ];

  meta = {

    changelog = "https://github.com/blaze/datashape/releases/tag/${finalAttrs.version}";

    homepage = "https://github.com/ContinuumIO/datashape";

    description = "Data description language";

    license = lib.licenses.bsd2;

    description = "Module for controlling the IKEA Dirigera Smart Home Hub";

    homepage = "https://github.com/Leggin/dirigera";

    changelog = "https://github.com/Leggin/dirigera/releases/tag/${finalAttrs.src.tag}";

    license = lib.licenses.mit;

    maintainers = with lib.maintainers; [ fab ];

    mainProgram = "generate-token";

  };

})

```

We can see several runtime dependencies, `numpy`, `multipledispatch`, and

`python-dateutil`. Furthermore, we have [`nativeCheckInputs`](#var-stdenv-nativeCheckInputs) with `pytestCheckHook`.

We can see several runtime dependencies, `pydantic`, `requests`, and

`websocket-client`. Furthermore, we have [`nativeCheckInputs`](#var-stdenv-nativeCheckInputs) with `pytestCheckHook`.

`pytestCheckHook` is a test runner hook and is only used during the [`checkPhase`](#ssec-check-phase) and is

therefore not added to `dependencies`.