These are sample assignments given in The Iron Yard's Python course. They are split into three sections: basics, data, and web.
The basics section is intended to be three weeks of work, and includes simulations and charting.
The data section is intended to be two weeks of work, and includes data analysis and machine learning.
The web section is intended to be two weeks of work.
Actual in-class assignments may differ from these, but these are a good starting point.
Note that these are not in any order inside each section. They do build on each other, but can be done in any order that makes sense.