Modulenotfounderror: no module named ‘notebook.base’

Modulenotfounderror: no module named ‘notebook.base’

The ModuleNotFoundError: No module named ‘notebook.base’ error occurs when you attempt to install or import nbextensions.

However, the current version of your Jupyter Notebook is incompatible with the extension installation.

Consequently, downgrading to a previous version may be necessary.

Why does this error?

The error ModuleNotFoundError: No module named ‘notebook.base’ is Python’s way of telling you that it can’t find the module you’re trying to import.

This could be due to a few reasons:

• The module isn’t installed:

Python can only import modules that are installed in your environment. If the module isn’t installed, Python won’t be able to find it.

• The module name is incorrect:

If you’ve misspelled the module name or if the module doesn’t exist, you’ll get this error.

• Python can’t find the module:

Python uses a list of directories defined in an environment variable called PYTHONPATH to determine where to look for modules. If your module isn’t in one of these directories, Python won’t be able to find it.

• You’re using Jupyter Notebook:

Jupyter Notebook has its own rules for where it looks for modules. Even if you’re in the right directory in your notebook, if the server was started in a different directory, Python might not be able to find your module.

• You have multiple Python installations:

If you have more than one version of Python installed on your computer, they might interfere with each other, causing this error.

How to fix Modulenotfounderror: no module named ‘notebook.base’ in Python?

To fix the ‘no module named notebook.base’ error message, you need to follow these steps:

Step 1: Install the notebook

To install the notebook execute the following command:

pip install notebook

Step 2: Install jupyter_contrib_nbextensions

To install the jupyter_contrib_nbextensions execute the following command:

pip install jupyter_contrib_nbextensions

If an error message occurs when pip install jupyter_nbextensions_configurator executes then you can also try to install these packages using the following command:

jupyter contrib nbextension install --user.

Step 3: Change the notebook to version

If the error persists, it might be due to a version issue. Try downgrading the notebook to a previous version if that resolved the problem before.

For example:

pip install jupyter notebook==6.1.0

or

pip install --upgrade notebook==6.4.12

Please note, to fix this error, you can try installing the module, checking the spelling of the module name, adding the module’s directory to PYTHONPATH, or starting your Jupyter Notebook server in the correct directory. If none of these solutions work, you might need to check your Python installation.

Conclusion

The ModuleNotFoundError: No module named ‘notebook.base‘ error occurs when you attempt to install or import nbextensions.

By following the solutions above, there’s no doubt that you’ll be able to resolve this error quickly.

Please note that given steps above are general steps and the exact solution might vary depending on the specifics of your project and environment.

We hope that you’ve resolved the error with the help of this guide. Thank you for reading, and have fun coding!

Diagnostic checklist for “No module named ‘notebook'”

• Verify pip install target. Run pip show notebook — if not installed, run pip install notebook.
• Check the active Python interpreter. which python (mac/Linux) or where python (Windows). Both pip and python must point to the same environment.
• Check virtual environment activation. If you use venv/conda, activate before installing: source .venv/bin/activate.
• Rule out uppercase/lowercase. Python imports are case-sensitive: import PyPDF2 not import pypdf2.
• Rule out the pip-vs-package-name mismatch. Some packages install under a different name than you import (e.g. pip install beautifulsoup4 → import bs4).

Installing notebook

# Standard pip install
pip install notebook

# In a virtual environment (recommended)
python -m venv .venv
source .venv/bin/activate  # or .venv\Scripts\activate on Windows
pip install notebook

# With uv (faster alternative)
uv pip install notebook

Common causes for “No module named ‘notebook'”

• Python interpreter mismatch. Multiple Python installations can confuse pip. Verify with which python and which pip.
• Virtual environment not activated. If the venv isn’t activated, pip installs to your system Python instead.
• Notebook kernel mismatch. Jupyter uses a kernel that may differ from your terminal Python. Use %pip install notebook inside the notebook.
• Import name differs from install name. pip install beautifulsoup4 → import bs4. Check the package’s PyPI page.
• Windows PATH issues. Ensure Python is on PATH; use python -m pip install to invoke pip via the correct Python.

Working code example

# Verify install worked
import notebook
print(getattr(notebook, '__version__', 'no version attribute'))

Best practices

• Always use a virtual environment. Avoids most module-not-found errors.
• Use pip freeze to lock versions. pip freeze > requirements.txt makes your setup reproducible.
• Consider uv or Poetry. Modern package managers with better dep resolution and reproducibility.

Caren Bautista

Technical Writer at PIES IT Solution

Responsible for crafting clear, well-structured, and beginner-friendly content across the platform. Handles the writing, proofreading, and editorial review of tutorials, guides, and documentation to ensure every article is accurate, readable, and easy to follow.

Expertise: Technical Writing · Content Creation · Documentation · Editorial Writing · JavaScript · TypeScript · Python · Python Errors · HTTP Errors · MS Excel
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