How to Fix ModuleNotFoundError: No module named 'numpy' When Building a Package with pip

· Python Developer Tooling Handbook – pydevtools.com · Aug. 8, 2026, 8:09 p.m.
Summary
This blog post provides a solution for resolving the 'ModuleNotFoundError: No module named numpy' issue that can occur when building a package with pip, specifically when numpy is already installed in your virtual environment. It includes troubleshooting steps and explanations to help users overcome this installation error.
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