I am assuming that you already have NumPy installed in your virtual environment if you have installed Anaconda. If you have used Python's standard distribution or any other distribution, you can go to http://www.numpy.org and follow the installation instructions provided there.

As mentioned previously, it's okay if you aren't a Python expert yet. Who knows, perhaps you're just now switching from OpenCV's C++ API. This is all fine. I wanted to give you a quick overview of how to get started with NumPy. If you are a more advanced Python user, you can simply skip this section.

Once you are familiar with NumPy, you will find that most scientific computing tools in the Python world are built around it. This includes OpenCV, so the time spent on learning NumPy is guaranteed to benefit you in the end.