Bad: The example below includes a long block of Python code that does a lot of things at once: defines functions, prints and plots data. It takes effort to unravel what is going on here. As a general rule, a code cell in a report should have no more than 20 lines of code, unless there is a very good reason for it.
Good: The same code as above is split into a few code cells. Beside simplifying the code structure, it is easier to explain what is the purpose of each bit of code.
