[v3] Implement zarr.copy_store

Zarr version

3.0.0.beta

Numcodecs version

0.13

Python Version

3.11

Operating System

Mac

Installation

pip

Description

We have not implemented zarr.copy, zarr.copy_all, or zarr.copy_store yet.

Steps to reproduce

zarr-python/src/zarr/api/asynchronous.py

Lines 199 to 208 in 5f3a512

    
           async def copy(*args: Any, **kwargs: Any) -> tuple[int, int, int]: 
        
               raise NotImplementedError 
        
           async def copy_all(*args: Any, **kwargs: Any) -> tuple[int, int, int]: 
        
               raise NotImplementedError 
        
           async def copy_store(*args: Any, **kwargs: Any) -> tuple[int, int, int]: 
        
               raise NotImplementedError

Additional output

No response

Proposal from today's dev meeting. We remove copy and copy_all and push copy_store to after 3.0.

Mark Zarr 3 as incompatible

Hello :), If I'd like to contribute this feature, would it be acceptable in the meantime to not bother at least in the meantime with the log, dry_run and {ex,in}cludes arguments?

@doronbehar

@doronbehar - glad to hear there is interest here. We'd be happy to accept such a contribution.

Any news on this?

Some colleagues pointed me at this issue and I wanted to add a little bit more context to make it easier for someone to pick up.

These functions existed in zarr-python 2.*, so there are reference implementations, docs, and tests for rougly equivalent functions (though not async, internals have changed, etc.)

Docs (which have links to source code) for the original functions and API:

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[v3] Implement `zarr.copy_store` #2407

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	async def copy(args: Any, *kwargs: Any) -> tuple[int, int, int]:
	raise NotImplementedError


	async def copy_all(args: Any, *kwargs: Any) -> tuple[int, int, int]:
	raise NotImplementedError


	async def copy_store(args: Any, *kwargs: Any) -> tuple[int, int, int]:
	raise NotImplementedError

[v3] Implement zarr.copy_store #2407

Description

Zarr version

Numcodecs version

Python Version

Operating System

Installation

Description

Steps to reproduce

Additional output

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jhamman commented on Nov 22, 2024

doronbehar commented on Feb 25, 2025

jhamman commented on Feb 25, 2025

Lorenzo-Mazza commented on Oct 17, 2025

ivirshup commented on Nov 7, 2025

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[v3] Implement `zarr.copy_store` #2407