ImportError: cannot import name 'default_from_dict' from 'haystack'

[hyerzn]

An error occurred while following your manual.
https://haystack.deepset.ai/integrations/elasticsearch-document-store#usage

from haystack_integrations.document_stores.elasticsearch import ElasticsearchDocumentStore

document_store = ElasticsearchDocumentStore(hosts = "http://localhost:9200")

and I got below error.

---------------------------------------------------------------------------
{
	"name": "ImportError",
	"message": "cannot import name 'default_from_dict' from 'haystack' (/Users/anaconda3/envs/venv/lib/python3.9/site-packages/haystack/__init__.py)",
	"stack": "---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
Cell In[50], line 1
----> 1 from haystack_integrations.document_stores.elasticsearch import ElasticsearchDocumentStore
      3 document_store = ElasticsearchDocumentStore(hosts = \"http://localhost:9200\")

File ~/anaconda3/envs/venv/lib/python3.9/site-packages/haystack_integrations/document_stores/elasticsearch/__init__.py:4
      1 # SPDX-FileCopyrightText: 2023-present deepset GmbH <[email protected]>
      2 #
      3 # SPDX-License-Identifier: Apache-2.0
----> 4 from .document_store import ElasticsearchDocumentStore
      6 __all__ = [\"ElasticsearchDocumentStore\"]

File ~/anaconda3/envs/venv/lib/python3.9/site-packages/haystack_integrations/document_stores/elasticsearch/document_store.py:11
      9 # There are no import stubs for elastic_transport and elasticsearch so mypy fails
     10 from elastic_transport import NodeConfig  # type: ignore[import-not-found]
---> 11 from haystack import default_from_dict, default_to_dict
     12 from haystack.dataclasses import Document
     13 from haystack.document_stores.errors import DocumentStoreError, DuplicateDocumentError

ImportError: cannot import name 'default_from_dict' from 'haystack' (/Users/anaconda3/envs/venv/lib/python3.9/site-packages/haystack/__init__.py)"
}

Describe your environment (please complete the following information):

• OS: MacOS
• Haystack version: 2.0.0b5
• Integration version: 0.2.0

[masci]

(edit: was on mobile when I first answered, now elaborating a bit more)

This is most likely an installation problem. As you can see from the docs, the version 1.x and 2.x of Haystack cannot exist in the same environment: during the installation they overwrite each other causing those weird import errors. The quickest solution is to start with a fresh environment.

If that's not your case, another similar problem might be you did pip install haystack, that would install some other software. If that's the case:

pip uninstall haystack
then
pip install -U haystack-ai

I'm going ahead and close this issue, let us know if you keep hitting the same error after cleaning up your installation.