[BUG] update_communities broken

[matthiaslau]

Bug Description

When activating update_communities there is an error ValueError: too many values to unpack (expected 2) in graphiti.py line 549 because update_community is returning a tuple but semaphore_gather then returns a list of tuples, not a merge of them. They need to be merged manually afterwards.

This was introduced here: https://github.com/getzep/graphiti/commit/dcc9da3f6887b84830758d7e89974eb4f2af8f92

Steps to Reproduce

await graphiti.add_episode(
    name=episode.name,
    episode_body=episode.episode_body,
    source_description=episode.source_description,
    reference_time=episode.reference_time,
    group_id=episode.group_id,
    update_communities=True,
)

Environment

• Graphiti Version: 0.18.6
• Python Version: 3.11
• Database Backend: Neo4j 5.26.6
• LLM Provider & Model: Google gemini-2.5-flash

Installation Method

• [ ] pip install
• [x] uv add
• [ ] Development installation (git clone)

Error Messages/Traceback

File "/app/.venv/lib/python3.11/site-packages/graphiti_core/graphiti.py", line 571, in add_episode
  raise e
File "/app/.venv/lib/python3.11/site-packages/graphiti_core/graphiti.py", line 549, in add_episode
  communities, community_edges = await semaphore_gather(
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: too many values to unpack (expected 2)

Possible Solution

update_community is returning a tuple but semaphore_gather then returns a list of tuples, not a merge of them. They need to be merged manually afterwards.

[kryyyyyy]

same problem!

[elimydlarz]

Experiencing this too

[theobjectivedad]

+1

[claude[bot]]

@matthiaslau Is this still an issue? Please confirm within 14 days or this issue will be closed.

[claude[bot]]

@matthiaslau Is this still an issue? Please confirm within 14 days or this issue will be closed.