AttributeError: 'NoneType' object has no attribute 'get'

TL;DR

Check which Chroma server you are talking to and install the matching client version, or upgrade both together. Check your version of Chroma first , maintainers often fix the underlying bug in a later release, and the thread may predate it.

Steps

1. Issue chroma-core/chroma#2510 (closed, 19 comments): ### What happened? I have installed latest version of chroma 0.5.4 using pip in python language I am connecting to my chroma set up in an AWS EC2 instance through docker installation method. After creating a connection through chroma HttpClient using the host address and port name I tried to get list of all my connections using the below code: collections= chromaclient.listcollections() and it is throwing the following error AttributeError: 'NoneType' object has no attribute 'get' I downgraded my chroma to version 0.5.3 and it was working fine Seems like an issue with newer version of 0.5.
2. This is almost always a client/server version mismatch. Check which Chroma server you are talking to and install the matching client version, or upgrade both together. Mixing a new client with an old server (or vice versa) is what produces the NoneType error.
3. This comes from one real issue thread (https://github.com/chroma-core/chroma/issues/2510); it is the verified fix or approach from that thread, not a general manual. Check your version of Chroma first , maintainers often fix the underlying bug in a later release, and the thread may predate it.

When to use

You are seeing this: Issue chroma-core/chroma#2510 (closed, 19 comments): ### What happened? Use this skill when you run into "AttributeError: 'NoneType' object has no attribute 'get'".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

Versions mentioned in the source: chroma 0.5.4, 0.5.3. If you are on something much newer or older, the details may have shifted.

Why this happens

Issue chroma-core/chroma#2510 (closed, 19 comments): ### What happened?

Sources

• https://github.com/chroma-core/chroma/issues/2510

Issue gh:chroma-core/chroma#2510 asked: Issue chroma-core/chroma#2510 (closed, 19 comments): ### What happened? I have installed latest version of chroma 0.5.4 using pip in python language I am connecting to my chroma set up in an AWS EC2 instance through docker installation method. After creating a connection through chroma HttpClient using the host address and port name I tried to get list of all my connections using the below code: collections= chromaclient.listcollections() and it is throwing the following error AttributeError: 'NoneType' object has no attribute 'get' I downgraded my chroma to version 0.5.3 and it was working fine Seems like an issue with newer version of 0.5. The verified answer from the thread: This is almost always a client/server version mismatch. Check which Chroma server you are talking to and install the matching client version, or upgrade both together. Mixing a new client with an old server (or vice versa) is what produces the NoneType error. Source: https://github.com/chroma-core/chroma/issues/2510