Uploaded April 2012 | Updated September 2026, 3 weeks ago
The blinking blue lines appear to be at different horizontal positions. But when they are presented continuously, it is easy to see that both lines are in fact aligned. This illusion is a variation on the Flash Grab effect by Patrick Cavanagh and Stuart Anstis. For an explanation, see http://www.cogsci.nl/illusions/flashing-grabbing-and-dancing-lines
The blinking blue lines appear to be at different horizontal positions. But when they are presented continuously, it is easy to see that both lines are in fact aligned. This illusion is a variation on the Flash Grab effect by Patrick Cavanagh and Stuart Anstis. For an explanation, see http://www.cogsci.nl/illusions/flashing-grabbing-and-dancing-lines
![Creating a command-line app in Python [PythonLiveLessons #4]](https://i.ytimg.com/vi/VcgBAwdz7aA/mqdefault.jpg "Creating a command-line app in Python [PythonLiveLessons #4]
The fifth episode of #PythonLiveLessons, a weekly live stream about Python code and more, hosted by Sebastiaan Mathôt. In this episode, well turn our `markdown_code_exec` Python module, which we created in previous episodes, into a command-line application! Well learn about the `argparse` module to parse command-like arguments, about entry points, and about the if name main convention.ing")
![Getting started with Git and GitHub [PythonLiveLessons #3]](https://i.ytimg.com/vi/X99FOxKcdMk/mqdefault.jpg "Getting started with Git and GitHub [PythonLiveLessons #3]
The fourth episode of #PythonLiveLessons, a weekly live stream about Python code and more, hosted by Sebastiaan Mathôt. In this episode, well get started with git to host the code for our `markdown_code_exec` on GitHub. Well learn about the most important git commands: commit, push, pull, remote, and add.")
![Building your first neural network with Keras and Python [Part 2]](https://i.ytimg.com/vi/XBc3kbel7XY/mqdefault.jpg "Building your first neural network with Keras and Python [Part 2]
(See https://python.cogsci.nl for code and written tutorials.) This is the second of a series of video tutorials about deep learning with Keras in Python. Here I show how you can build, train, and validate a simple, three-layer neural network.")
