How to Install and Use the NumPy Module in Python

There are two common ways to install the NumPy module: running a downloaded .exe installer or using pip with a .whl file; this guide focuses on the pip method.

First, open the PyPI page https://pypi.org/project/numpy/#files and locate the wheel that matches your Python version (e.g., Python 3.6 requires the cp36‑none‑win_amd64 wheel). Download the file and place it in the Scripts directory of your Python installation.

Update pip with python -m pip install -U pip in a command prompt, then navigate to the Scripts folder and run a command similar to pip3.6 install numpy-1.14.3-cp36-none-win_amd64.whl (replace the filename with the version you downloaded). Successful installation shows a “Successfully installed …” message.

Verify the installation by running a short test script:

<code>import numpy as np
print(np.random.rand(3, 3))</code>

The output is a random 3×3 matrix, confirming NumPy works.

If you encounter ImportError: No module named numpy in an IDE such as PyCharm, it usually means the IDE is using a different Python interpreter. Configure PyCharm to use the interpreter where NumPy was installed (File → Settings → Project → Python Interpreter).

After setting the correct interpreter, the import succeeds.