Uploaded April 2012 | Updated September 2026, 3 weeks ago
If you keep your eyes fixated on the cross, you can see a very compelling colour after effect: If a dot disappears, it is replaced by an (illusory) dot of an opponent colour. For more information and other optical illusions, see http://www.cogsci.nl
If you keep your eyes fixated on the cross, you can see a very compelling colour after effect: If a dot disappears, it is replaced by an (illusory) dot of an opponent colour. For more information and other optical illusions, see http://www.cogsci.nl
![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")
