writeable zarr labels layer

[ianhi]

may be nice to use at some point. The trick is to use wrapt to overwrite the dunder method.

import napari

import zarr
import wrapt
import numpy as np




class zarrWrapper(wrapt.ObjectProxy):
    """Add fancy indexing to zarr."""

    def __getitem__(self, key):
        """Get some data inplace maybe using numpy indexing"""
        try:
            return self.__class__.__getitem__(self, key)
        except IndexError as e:
            try:
                return self.vindex[key]
            except Exception:
                raise e

    def __setitem__(self, key, value):
        """Edit data in-place allowing for fancy indexing"""
        try:
            self.__class__.__setitem__(self, key, value)
        except IndexError as e:
            try:
                self.vindex[key] = value
            except Exception:
                raise e

z_arr = zarrWrapper(zarr.zeros((50, 512, 512), dtype=np.uint16))


viewer = napari.Viewer()
viewer.add_labels(z_arr)
napari.run()