Backport PR #1754 on branch 0.11.x ((fix): resolve cupy import error …

…on `cupy-cuda12x<0.13`) (#1755)

Co-authored-by: Ilan Gold <[email protected]>

docs/release-notes/1754.bugfix.md

@@ -0,0 +1 @@
+Fix `cupy<0.13` imports in non-gpu environments {user}`ilan-gold`

src/anndata/compat/__init__.py

@@ -140,7 +140,16 @@ def __repr__():
             return "mock dask.array.core.Array"
 
 
-if find_spec("cupy") or TYPE_CHECKING:
+# https://github.com/scverse/anndata/issues/1749
+def is_cupy_importable() -> bool:
+    try:
+        import cupy  # noqa: F401
+    except ImportError:
+        return False
+    return True
+
+
+if is_cupy_importable() or TYPE_CHECKING:
     from cupy import ndarray as CupyArray
     from cupyx.scipy.sparse import csc_matrix as CupyCSCMatrix
     from cupyx.scipy.sparse import csr_matrix as CupyCSRMatrix