allow random state in blobs (#2683)

Co-authored-by: Philipp A. <flying-sheep@web.de>

docs/release-notes/1.10.0.md

@@ -3,6 +3,7 @@
 ```{rubric} Features
 ```
 
+* {func}`scanpy.datasets.blobs` now accepts a `random_state` argument {pr}`2683` {smaller}`E Roellin`
 * {func}`scanpy.pp.pca` and {func}`scanpy.pp.regress_out` now accept a layer argument {pr}`2588` {smaller}`S Dicks`
 * {func}`scanpy.pp.subsample` with `copy=True` can now be called in backed mode {pr}`2624` {smaller}`E Roellin`
 * {func}`scanpy.pp.neighbors` now has a `transformer` argument allowing for more flexibility {pr}`2536` {smaller}`P Angerer`

scanpy/datasets/_datasets.py

@@ -10,6 +10,7 @@
 from .._settings import settings
 from ..readwrite import read, read_visium
 from ._utils import check_datasetdir_exists, filter_oldformatwarning
+from .._utils import AnyRandom
 
 HERE = Path(__file__).parent
 
@@ -19,6 +20,7 @@ def blobs(
     n_centers: int = 5,
     cluster_std: float = 1.0,
     n_observations: int = 640,
+    random_state: AnyRandom = 0,
 ) -> ad.AnnData:
     """\
     Gaussian Blobs.
@@ -34,6 +36,8 @@ def blobs(
     n_observations
         Number of observations. By default, this is the same observation number
         as in :func:`scanpy.datasets.krumsiek11`.
+    random_state
+        Determines random number generation for dataset creation.
 
     Returns
     -------
@@ -47,7 +51,7 @@ def blobs(
         n_features=n_variables,
         centers=n_centers,
         cluster_std=cluster_std,
-        random_state=0,
+        random_state=random_state,
     )
     return ad.AnnData(X, obs=dict(blobs=y.astype(str)))