The Attributes class (zarr.attrs)

class zarr.attrs.Attributes(store, key='.zattrs', read_only=False, cache=True, synchronizer=None)

Class providing access to user attributes on an array or group. Should not be instantiated directly, will be available via the .attrs property of an array or group.


store : MutableMapping

The store in which to store the attributes.

key : str, optional

The key under which the attributes will be stored.

read_only : bool, optional

If True, attributes cannot be modified.

cache : bool, optional

If True (default), attributes will be cached locally.

synchronizer : Synchronizer

Only necessary if attributes may be modified from multiple threads or processes.

__setitem__(item, value)

Retrieve all attributes as a dictionary.


Overwrite all attributes with the key/value pairs in the provided dictionary d in a single operation.

update(*args, **kwargs)

Update the values of several attributes in a single operation.


Refresh cached attributes from the store.