Describe zarr stores from the command line. A path to any filesystem implemented by fsspec is valid.

Installation

$ pip install zarrdump

Usage

If zarr store can be opened by xarray, the xarray representation will be displayed:

$ zarrdump gs://bucket/dataset.zarr
<xarray.Dataset>
Dimensions:  (lat: 73, lon: 144, time: 32)
Coordinates:
* lat      (lat) float64 -90.0 -87.5 -85.0 -82.5 -80.0 ... 82.5 85.0 87.5 90.0
* lon      (lon) float64 0.0 2.5 5.0 7.5 10.0 ... 350.0 352.5 355.0 357.5
* time     (time) object 2016-12-01 00:00:00 ... 2017-01-01 00:00:00
Data variables:
    ps       (time, lat, lon) float32 dask.array<chunksize=(4, 73, 144), meta=np.ndarray>
    ts       (time, lat, lon) float32 dask.array<chunksize=(4, 73, 144), meta=np.ndarray>

Can show information for a particular variable/array:

$ zarrdump -v ts gs://bucket/dataset.zarr
<xarray.DataArray 'ts' (time: 32, lat: 73, lon: 144)>
dask.array<zarr, shape=(32, 73, 144), dtype=float32, chunksize=(4, 73, 144), chunktype=numpy.ndarray>
Coordinates:
* lat      (lat) float64 -90.0 -87.5 -85.0 -82.5 -80.0 ... 82.5 85.0 87.5 90.0
* lon      (lon) float64 0.0 2.5 5.0 7.5 10.0 ... 350.0 352.5 355.0 357.5
* time     (time) object 2016-12-01 00:00:00 ... 2017-01-01 00:00:00
Attributes:
    longname:  surface temperature
    units:     K

Diagnostic information will also be printed for zarr arrays or zarr groups which do not represent xarray datasets:

$ zarrdump group.zarr
Name        : /
Type        : zarr.hierarchy.Group
Read-only   : False
Store type  : fsspec.mapping.FSMap
No. members : 2
No. arrays  : 2
No. groups  : 0
Arrays      : bar, foo