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How to Run a Keras Model in the Browser with Keras.js

Introduction This article explains how to export weights from a Keras model and import those weights in Keras.js, a JavaScript framework for running pre-trained neural networks in the browser. While the Keras.js GitHub page sketches out how to import weights, this post makes all the steps explicit and deals with a few gotchas. This post covers: Installing the right version of Keras, training your network, and exporting the weights.

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How to Exit When Errors Occur in Bash Scripts

It’s a common issue that scripts written and tested on GNU/Linux don’t run correctly on macOS–or vice versa–because of differences between the GNU and BSD versions of the core utils. Error messages can get drowned in the script output, making it far from obvious that something isn’t executing correctly. There are a couple of easy fixes to avoid problems like this, but they rely on some bash features that you may not be familiar with if you don’t do a ton of scripting.

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Resizing Matplotlib Legend Markers

How to Resize Matplotlib Legend Markers I frequently find myself plotting clusters of points in Matplotlib with relatively small marker sizes. This is a useful way to visualize the data, but the plot’s legend will use the same marker sizes by default and it can be quite difficult to discern the color of a single point in isolation. Let’s plot a few random clusters of points to see what this problem looks like in practice.

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How to Use a Custom SSH Identity with Git

This page describes how to specify which SSH profile to use with git. This can be handy if you have more than one GitHub account and don’t wish to reuse your default SSH key or type in a password every time you push or pull. The commands will be written from the perspective of a GitHub user, but should be easy to adapt to other scenarios as well. Step-by-Step Instructions Generate a new SSH key:

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How to Clear the Chrome Browser Cache With Selenium WebDriver/ChromeDriver

Sometimes during the course of testing or web scraping with Google Chrome, you might desire to clear the browser cache and cookies with Selenium. You can of course call driver.close() on your current ChromeDriver instance and then provision a new one. The fresh instance of Chrome will start with a clean browser history, cookies, and cache. There are however times when this method loses other state that you may want to preserve.

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