You still need an empty line here.  The code block is not rendering:
![screen shot 2013-09-10 at 5 42 56 pm](https://f.cloud.github.com/assets/1702745/1118631/03bd5e16-1a62-11e3-89a7-32da488cfa5f.jpg)

Put an empty line between "Codes:" and "```python"