Cross Entropy Loss in PyTorch
Ben Cook • Posted 2020-07-24 • Last updated 2021-10-14Cross entropy loss in PyTorch can be a little confusing. Here is a simple explanation of how it works for people who get stuck.
Recipe
Pairwise Distance in NumPy
Ben Cook • Posted 2020-06-01 • Last updated 2021-10-15You can do vectorized pairwise distance calculations in NumPy (without using SciPy). This lets you extend pairwise computations to other kinds of functions.
Download a YouTube Video from the Command Line with youtube-dl
Ben Cook • Posted 2020-02-15 • Last updated 2021-10-15You can use youtube-dl to download arbitrary YouTube videos from the command line. This is useful for doing machine learning on new videos.
Machine Learning Pipelines Should Be Python Packages: Transfer Learning
Ben Cook • Posted 2019-04-23 • Last updated 2021-07-08Building machine learning pipelines as well-formed Python packages simplifies transfer learning. Here’s a simple example.
Object Spread Operator for Python
Ben Cook • Posted 2019-03-17 • Last updated 2021-10-15The object spread operator is a useful pattern in JavaScript. You can do something similar in Python.
Source Code Layout for Machine Learning Pipelines
Ben Cook • Posted 2019-03-12 • Last updated 2021-10-21How you structure code in an ML pipeline makes a big difference in whether other people can easily use it. Here’s a recommendation for how to do it well.
Changing the Python Version in Conda
Ben Cook • Posted 2017-03-09 • Last updated 2021-10-15The latest version of Anaconda comes with Python 3.8. But sometimes you need to use an earlier release.
PyTorch Add Dimension: Expanding a Tensor with a Dummy Axis
Ben Cook • Posted 2017-03-09 • Last updated 2021-10-21 • Code
Adding a dimension to a tensor can be important when you’re building deep learning models.
Sending a Text Message with AWS SNS
Ben Cook • Posted 2017-03-02 • Last updated 2021-10-21
SNS is AWS’s pub-sub service. It’s useful for sending and receiving alerts for events you care about. It can also be used to send SMS messages.
Some Cool IPython Tips
Ben Cook • Posted 2017-02-25 • Last updated 2021-10-15The IPython shell is a fast way to evaluate small bits of code. It also functions as a mighty fine calculator.