ImportError: cannot import name 'PydanticOutputParser' from 'langchain_core.output_parsers'

[Nilay1136]

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Example Code

from langchain_openai import AzureOpenAIEmbeddings

embeddings = AzureOpenAIEmbeddings(deployment=OPENAI_EMBEDDING_DEPLOYMENT_NAME, 
                                openai_api_key=OPENAI_API_KEY, 
                                model=OPENAI_EMBEDDING_MODEL_NAME, 
                                openai_api_type=OPENAI_API_TYPE, 
                                chunk_size=1)

Description

• I am using Langchain to generate embeddings for my documents
• Here are my dependencies with versions
  langchain 0.1.6
  langchain-community 0.0.19
  langchain-core 0.1.28
  langchain-openai 0.0.8
  langdetect 1.0.9
  langsmith 0.1.14

It was working before but suddenly I'm getting an Import error with Langchain_core.output_parsers that it can't import PydanticOutputParser. I've attached an image for reference.

System Info

langchain 0.1.6
langchain-community 0.0.19
langchain-core 0.1.28
langchain-openai 0.0.8
langdetect 1.0.9
langsmith 0.1.14

Python 3.11.5

[dosubot[bot]]

Hey @Nilay1136, back for more adventures in the land of LangChain, I see! Great to have you here again.

Based on the error message you've provided, it seems like there's an issue with the import statement for the PydanticOutputParser class from the langchain_core.output_parsers module. This could be due to a few reasons:

1. The PydanticOutputParser class might have been moved, renamed, or removed in a recent update of the langchain_core package. You mentioned that you're using version 0.1.28 of langchain_core, but the latest version of LangChain is v0.1.10. There might be some inconsistencies between these versions. You can check the LangChain repository to see if there have been any recent changes to the PydanticOutputParser class.

2. There might be an issue with your Python environment. If the langchain_core package is not properly installed in your environment, Python might not be able to find the PydanticOutputParser class. You can try reinstalling the langchain_core package to see if that resolves the issue.

3. The langchain_openai package might not be compatible with the version of langchain_core you're using. If the AzureOpenAIEmbeddings class in langchain_openai is trying to import the PydanticOutputParser class from langchain_core, but the class doesn't exist in the version of langchain_core you're using, that would cause an ImportError. You can check the dependencies of the langchain_openai package to see if it requires a specific version of langchain_core.

If none of these suggestions resolve the issue, could you please provide more information about the context in which you're using the AzureOpenAIEmbeddings class? Specifically, it would be helpful to know where in your code you're importing and using this class, and what you're trying to achieve with it. This will help me better understand the issue and provide a more accurate solution.

Sources

• libs/langchain/langchain/embeddings/azure_openai.py
• libs/core/langchain_core/output_parsers/pydantic.py

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[aiakubovich]

pip install --upgrade langchain and restarting jupyter notebook helped me

[quiet-sleep]

Yes, my langchain-core version is 0.2.9 and langchain version is 0.2.5, when I update the version, langchain-core becomes 0.2.10 and langchain becomes 0.2.6, the problem is solved!

[ijaytelgote]

Yes working!!
Thanks