Version Compatibility

Reference examples tested with: spatialdata 0.2+, spatialdata-io 0.1.5+, squidpy 1.4+, scanpy 1.10+, anndata 0.10+

Before using code patterns, verify installed versions match. If versions differ:

• Python: pip show <package> then help(module.function) to check signatures

If code throws ImportError, AttributeError, or TypeError, introspect the installed package and adapt the example to match the actual API rather than retrying.

Spatial Data I/O

"Load my spatial data" -> Parse a platform's output bundle into one coordinate frame holding the expression matrix, coordinates, images, and (for imaging) the molecule table and segmentation shapes.

• Imaging/in-situ (Xenium, MERSCOPE/MERFISH, CosMx, seqFISH): spatialdata_io.{xenium, merscope, cosmx} -> SpatialData with a per-transcript points table AND a derived per-cell tables matrix.
• Sequencing/capture (Visium, Visium HD, Slide-seq/Curio, Stereo-seq): squidpy.read.visium or spatialdata_io.{visium, visium_hd, curio, stereoseq} -> spot/bin matrix + coordinates; NO molecule table.

Governing Principle

The single most consequential I/O fact is that the two platform classes emit different primary objects, and one class emits two of them that are easy to confuse.