Fix no module named ‘numpy.core._multiarray_umath [Easily]

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“no module named ‘numpy.core._multiarray_umath'” error often occurs when the necessary ‘numpy’ module is not found or is incompatible with the current Python environment. In this article, we will explore the causes of this error and provide troubleshooting steps to fix it.

no module named ‘numpy.core._multiarray_umath

‘numpy’ is a popular Python library used for scientific computing and working with arrays. It provides efficient numerical operations and supports a wide range of mathematical functions. Many Python projects and libraries depend on ‘numpy’ for their functionality.

‘numpy’ is commonly used for tasks such as numerical computations, data manipulation, linear algebra, statistical analysis, and more. Its versatile array data structure and optimized mathematical functions make it a fundamental tool in the Python ecosystem.

Cause of This Error

The most common cause of the “no module named ‘numpy.core._multiarray_umath'” error is the absence of the ‘numpy’ module on your system. If ‘numpy’ is not installed, Python will be unable to find and import the necessary files, resulting in this error. It can also occur due to outdated numpy version.

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How To Fix no module named ‘numpy.core._multiarray_umath in Python?

First, ensure that ‘numpy’ is installed on your system. You can do this by opening a command prompt or terminal and running the following command:

pip show numpy

If ‘numpy’ is installed, you should see information about the installed version. If it’s not installed, you can install it by running:

pip install numpy

Update numpy

If ‘numpy’ is already installed but you’re still encountering the error, it’s due to you have an outdated version. To update ‘numpy’ to the latest version, run the following command:

pip install --upgrade numpy

Updating ‘numpy’ can resolve compatibility issues and ensure that you have the necessary files and modules for your Python project.

Reinstall numpy

If all else fails, you can try reinstalling ‘numpy’ to fix the error. Start by uninstalling the existing ‘numpy’ installation using the following command:

pip uninstall numpy

After uninstalling, you can proceed to reinstall ‘numpy’ using:

pip install numpy

Reinstalling ‘numpy’ can resolve any corrupted files or configuration issues that might be causing the error.

Also Read: ImportError: Attempted Relative Import with No Known Parent Package [Fixed]


The original error named “no module named ‘numpy.core._multiarray_umath'” error due to old version of numpy or it can occur due to numpy isn’t installed. By installing and updating numpy will resolve this issue.


I have multiple Python versions installed. Can that cause the ‘no module named ‘numpy.core._multiarray_umath” error?

Yes, having multiple Python versions installed can lead to conflicts and cause the ‘no module named ‘numpy.core._multiarray_umath” error. Ensure that ‘numpy’ is installed in the correct Python environment that you are using for your project.

Will reinstalling ‘numpy’ affect my existing Python projects?

Reinstalling ‘numpy’ should not affect your existing Python projects unless they specifically rely on a particular ‘numpy’ version. However, it’s always a good practice to test your projects after reinstalling to ensure compatibility and functionality.

How can I check the version of ‘numpy’ installed on my system?

To check the version of ‘numpy’ installed on your system, open a command prompt or terminal and run the following command: pip show numpy. It will display information about the installed version of ‘numpy’.

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