DuckDuckGoSearchRun leads to AttributeError: 'FieldInfo' object has no attribute 'run'

[m-henneke]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

from langchain_community.tools import DuckDuckGoSearchRun

tool = DuckDuckGoSearchRun()

tool.invoke("Size of Eifel tower")

Error Message and Stack Trace (if applicable)

Traceback (most recent call last):
File "/opt/conda/envs/my_env/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3553, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "", line 5, in
tool.invoke("Size of Eifel tower")
File "/opt/conda/envs/my_env/lib/python3.11/site-packages/langchain_core/tools/base.py", line 397, in invoke
return self.run(tool_input, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/conda/envs/my_env/lib/python3.11/site-packages/langchain_core/tools/base.py", line 586, in run
raise error_to_raise
File "/opt/conda/envs/my_env/lib/python3.11/site-packages/langchain_core/tools/base.py", line 555, in run
response = context.run(self._run, *tool_args, **tool_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/conda/envs/my_env/lib/python3.11/site-packages/langchain_community/tools/ddg_search/tool.py", line 73, in _run
return self.api_wrapper.run(query)
^^^^^^^^^^^^^^^^^^^^
AttributeError: 'FieldInfo' object has no attribute 'run'

Description

I'm trying to run a DuckDuckGo-search using langchaing_community.
Since updating to the latest pypi versions (langchain==0.3.2 and langchain_community==0.3.1), this error is returned.

System Info

System Information

OS: Linux
OS Version: #16~22.04.1-Ubuntu SMP Mon Aug 19 19:38:17 UTC 2024
Python Version: 3.11.10 | packaged by conda-forge | (main, Sep 22 2024, 14:10:38) [GCC 13.3.0]

Package Information

langchain_core: Installed. No version info available.
langchain: 0.3.2
langchain_community: 0.3.1
langsmith: 0.1.131
langchain_huggingface: 0.1.0
langchain_openai: 0.1.25
langchain_text_splitters: 0.3.0
langgraph: 0.2.34

Optional packages not installed

langserve

Other Dependencies

aiohttp: 3.10.9
async-timeout: Installed. No version info available.
dataclasses-json: 0.6.7
httpx: 0.27.2
huggingface-hub: 0.25.1
langgraph-checkpoint: 2.0.1
numpy: 1.26.4
openai: 1.51.0
orjson: 3.10.7
pydantic: 2.9.2
pydantic-settings: 2.5.2
PyYAML: 6.0.2
requests: 2.32.3
requests-toolbelt: 1.0.0
sentence-transformers: 3.1.1
SQLAlchemy: 2.0.35
tenacity: 8.5.0
tiktoken: 0.8.0
tokenizers: 0.20.0
transformers: 4.45.1

[JamieHvizdos]

Hi! I represent a team of Computer Science students who are looking to gain experience working with large software systems. We would like to claim this issue to work on.

[JamieHvizdos]

Hi @m-henneke, we have started looking into the issue and we are unable to replicate this issue on the latest version.

We are on langchain version 0.3.3, langchain-community version 0.3.2 and duckduckgo-search version 6.3.0. Could you try updating to these versions and see if you are still getting the same error?

[m-henneke]

Hi @JamieHvizdos, thanks for your suggestion. DDG-search works again with langchain 0.3.3 and langchain-community 0.3.2!

As a side note for others, there may have been a problem with my langchain-core installation (possibly 0.3.9) as shown above in the package info. Not sure if this caused the problem, but I had to create a new env to upgrade the packages.

langchain_core: Installed. No version info available.

[pradeepdev-1995]

any update on this?

[AmrinKareem]

I have the same issue as well.

[AmrinKareem]

Also, I was receiving this warning: LangChainDeprecationWarning: As of langchain-core 0.3.0, LangChain uses pydantic v2 internally. The langchain.pydantic_v1 module was a compatibility shim for pydantic v1, and should no longer be used. Please update the code to import from Pydantic directly.

For example, replace imports like: from langchain.pydantic_v1 import BaseModel
with: from pydantic import BaseModel

So I did this in the tool.py inside langchain_experimental-> tools -> python and it worked fine.