Fixes old docker-py code importing the removed docker.Client class. Use when from docker import Client fails on docker-py 4+. Not for daemon connection errors.
TL;DR: docker.Client was renamed to docker.APIClient in docker-py 4.0. Change from docker import Client to from docker import APIClient, or better, use the high-level docker.from_env() client.
ImportError: cannot import name 'Client' from 'docker'
Fix it
Replace the import: from docker import APIClient. Expected: the import succeeds.
Update instantiations: APIClient(base_url='unix://var/run/docker.sock') where you had Client(...). Expected: same behavior.
Better yet, switch to the high-level API: client = docker.from_env(). Expected: simpler code, same daemon.
Bump any pin in requirements to docker>=4.0 so fresh installs do not regress.
When this applies
The code does from docker import Client and docker-py is 4.x+.
When it doesn't
docker-py is 3.x and you want the old API: keep the pin, but 3.x is ancient.
The import works but calls fail: daemon connection problem, not this.
Compatibility
docker-py >= 4.0 renamed it; docker.from_env() is the modern path.
Why it happens
docker-py 4.0 split the low-level APIClient from the high-level DockerClient and dropped the old Client alias, breaking old tutorials verbatim.
Edge cases
Some old libraries import docker.Client internally; upgrade those libraries.
docker.APIClient still exists in 7.x, so the rename is forward-safe.
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Published recentlyPublished Oct 3, 2026. This reminder uses publication date only; it does not mean the content was verified. Review again after Apr 1, 2027.
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Published recentlyPublished Oct 3, 2026. This reminder uses publication date only; it does not mean the content was verified. Review again after Apr 1, 2027.