ModuleNotFoundError: No module named 'sklearn'

Not specified by the original author.

How to fix ModuleNotFoundError: No module named 'sklearn'

Same name game: pip install scikit-learn, import sklearn. Run python -m pip install scikit-learn with the python you actually use. If pip says it is already there, your python and pip point at different environments; python -m pip fixes that class of problem permanently.

The exact error

ModuleNotFoundError: No module named 'sklearn'

Fix it

1. python -m pip install scikit-learn Expected: Successfully installed scikit-learn

2. python -c "import sklearn; print(sklearn.__version__)" Expected: prints a version

3. Check env match: python -c "import sys; print(sys.executable)". Expected: same env pip installed into

When this applies

import sklearn -> No module named 'sklearn'

When this does NOT apply

sklearn imports but a submodule is missing (version issue)

Versions

any

Why it happens

pip distribution name (scikit-learn) differs from import name (sklearn).

Edge cases

Do not pip install sklearn (a dummy package); always scikit-learn.

Asked about: ModuleNotFoundError: No module named 'sklearn' (gh:mirjan-ali-sha/supervisedclassifier#1). The verified fix: Same name game: pip install scikit-learn, import sklearn. Run python -m pip install scikit-learn with the python you actually use. If pip says it is already there, your python and pip point at different environments; python -m pip fixes that class of problem permanently. Full thread: https://github.com/mirjan-ali-sha/supervisedclassifier/issues/1

Not specified by the original author.

TL;DR

The ModuleNotFoundError: No module named 'scripts' is fixed by adding the generative-models dir to PYTHONPATH: export PYTHONPATH=$PYTHONPATH:root/image2video/generative-models (adjust the path to your checkout).

ModuleNotFoundError: No module named 'scripts'

Steps

1. The ModuleNotFoundError: No module named 'scripts' is fixed by adding the generative-models dir to PYTHONPATH: export PYTHONPATH=$PYTHONPATH:root/image2video/generative-models (adjust the path to your checkout).

When to use

You are seeing this: How to moduleNotFoundError: No module named 'scripts'. Use this skill when you run into "ModuleNotFoundError: No module named 'scripts'".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Sources

• https://github.com/Stability-AI/generative-models/issues/169

In gh:Stability-AI/generative-models#169, the reporter ran into: Issue Stability-AI/generative-models#169 (closed, 6 comments): When starting the UI, an error occurs: E:\GITHUB\generative-models\.pt2\lib\site-packages orchaudio\backend\utils.py:74: UserWarning: No audio backend is available. warnings.warn("No audio backend is available.") 2023-11-23 14:24:04.215 Uncaught app exception Traceback (most recent call last): File "E:\GITHUB\generative-models\.pt2\lib\site-packages\streamlit\runtime\scriptrunner\scriptrunner.py", line 534, in runscript exec(code, module.dict_) File "E:\GITHUB\generative-models\scripts\demo\sampling.py", line 3, in [module]... The verified answer was: The ModuleNotFoundError: No module named 'scripts' is fixed by adding the generative-models dir to PYTHONPATH: export PYTHONPATH=$PYTHONPATH:root/image2video/generative-models (adjust the path to your checkout). Source issue: https://github.com/Stability-AI/generative-models/issues/169

Not specified by the original author.

TL;DR

For "ModuleNotFoundError: No module named 'langchain_openai'": run pip show langchain-openai. LangChain splits every provider into its own package. pip install langchain never includes them. A fresh venv, a new container, or a lockfile that dropped the extra is the usual trigger. ` pip install -U langchain-openai 3. uv-managed project? Use uv add langchain-openai.

ModuleNotFoundError: No module named 'langchain_openai'

When to use

You are seeing this: If it prints nothing, the package is genuinely absent. Use this skill when you run into "Diagnose: ModuleNotFoundError: No module named 'langchain_openai'".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Steps

1. Run pip show langchain-openai. If it prints nothing, the package is genuinely absent. Also check you are in the right environment: which python and pip list | grep langchain should agree.
2. LangChain splits every provider into its own package. pip install langchain never includes them. A fresh venv, a new container, or a lockfile that dropped the extra is the usual trigger.

pip install -U langchain-openai

3. uv-managed project? Use uv add langchain-openai. Do not mix pip and uv.

from langchain_openai import ChatOpenAI
print("ok")

4. If the import works, done. If pip claims it installed but the import still fails, you have two environments and installed into the wrong one.

Why this happens

LangChain splits every provider into its own package. pip install langchain never includes them.

Edge cases

• Also check you are in the right environment: which python and pip list | grep langchain should agree.

Diagnostic procedure grounded in the official install docs, verified 2026-09-26. Install: docsgchain.com/oss/python/langchain/install