Import "langgraph.graph" could not be resolved - Pylance reportMissingImports

[tedjames]

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Example Code

from langchain_openai import ChatOpenAI
from langchain_core.messages import HumanMessage
from langgraph.graph import END, MessageGraph

model = ChatOpenAI(temperature=0)

graph = MessageGraph()

graph.add_node("oracle", model)
graph.add_edge("oracle", END)

graph.set_entry_point("oracle")

runnable = graph.compile()

runnable.invoke(HumanMessage("What is 1 + 1?"))

Description

I am trying to install langgraph into a new project but am constantly seeing this Import "langgraph.graph" could not be resolved - Pylance reportMissingImports error.

I've tried installing with both poetry and pip directly to no avail. I've also tried using a few different interpreters but nothing seems to work... Langchain imports just fine but Langgraph does not for some reason.

I'm mostly a JS/TS guy so I do apologize in advanced if I'm missing something blatantly obvious here! Would appreciate any help getting this to work :)

System Info

System Information

OS: Darwin
OS Version: Darwin Kernel Version 22.6.0: Wed Jul 5 22:22:05 PDT 2023; root:xnu-8796.141.3~6/RELEASE_ARM64_T6000
Python Version: 3.12.2 (main, Feb 6 2024, 20:19:44) [Clang 15.0.0 (clang-1500.1.0.2.5)]

Package Information

langchain_core: 0.1.36
langchain: 0.1.13
langchain_community: 0.0.29
langsmith: 0.1.38
langchain_openai: 0.1.1
langchain_text_splitters: 0.0.1
langgraph: 0.0.30

Packages not installed (Not Necessarily a Problem)

The following packages were not found:

langserve

[dosubot[bot]]

Hey @tedjames, great to see you tackling the Python world with the enthusiasm of a JavaScript guru! I remember our last epic quest through the realms of code. How's the journey been treating you since?

Based on the context provided, it seems like there might be a discrepancy between the installed version of langgraph and the version that your code is expecting. The import error suggests that the langgraph.graph module cannot be found, which could be due to a change in the module structure in a recent version of langgraph.

One possible solution is to check the langgraph documentation or source code for the version you have installed (0.0.30) to see if the graph module is located somewhere else. If the module structure has changed, you would need to update your import statement to match the new structure.

Another possibility is that there's a compatibility issue with your Python version (3.12.2). According to the context provided, there are known compatibility issues with the qdrant-client and rapidocr-onnxruntime dependencies, which specify a Python version requirement of >=3.8.1,<3.12. This could potentially cause issues with other packages as well, including langgraph.

As a first step, I would recommend checking the langgraph documentation or source code to verify the location of the graph module. If that doesn't resolve the issue, you might consider downgrading your Python version to a version that's compatible with all your dependencies.

If you're still encountering issues after trying these steps, please provide more information about the error and your environment, and I'll do my best to assist you further.

Sources

• DOC: Code Writing example throws error with PythonREPL import
• libs/langchain/langchain/graphs/init.py
• libs/langchain/pyproject.toml

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[arslanabid02]

This is happening because you might have a file named langgraph.py in your current working directory, and Python is trying to import from this file instead of the langgraph package.
try to change its name to something else.
If one of your file name is langchain.py, then it can effect other python files in that same directory. Effecting the imports of langgraph.

[HrishikeshAgnihotri30]

Good Catch! Thank You. Was facing the same issue