How to Fix the 'RuntimeError: Package Fails Sanity Check' for NumPy on Windows?

Resolving "RuntimeError: Package Fails Sanity Check" for NumPy and Pandas

Encountering a "RuntimeError" indicating a failed sanity check for NumPy can be frustrating, especially when the error message provides limited guidance. To address this issue effectively, let's explore the underlying cause and provide a solution.

The error arises due to a bug in the Windows runtime, affecting installations using Python 3.9 and NumPy 1.19.4. The issue manifests when using PyCharm.

Solution:

To resolve the problem, follow these steps:

1. Uninstall NumPy 1.19.4 from your Python environment.
2. Install NumPy version 1.19.3 or later.

Alternatively, as of January 5th, 2021, NumPy version 1.19.5 has been released, which appears to resolve this issue.

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