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In this video we show that the one place we typically prefer while-loops is when we are modifying a list or other mutable iterable. While we did see how to do this with for-loops (by looping over…

In this video we talk about the while-loop and explain why it is necessary. In particular, there are types of iteration that are not possible with the for-loop.

When we were recording the video on custom error types, it ran quite long. So we decided to break it up into a second video. In this video we look at a slightly more complicated error type. We also…

In this video we show how to use the error type to give you more control over a try-except statement. You can chose to recover from some errors, while completely ignoring other errors.

Whenever we have enforced preconditions, we have always used the type function. In this video we show why that is a problem, particularly when we want to use an object argument that is a subclass of…

In this video we show that thte primary purpose of the super function is in the initializer method of the subclass. That is because we cannot guarantee that all of the attributes for the parent class…

We know how to enforce preconditions, but how do we force invariants for our attributes? As we see in this video, we do it much the same as for preconditions. But that is because we are going to…

Anthony Townsend (Host), and Gary Johnson, Molly Turner and Ren Yee.

Zoom Recording ID: 97470844866 UUID: Rc1xL+sZRbmcGWwApOSxiQ== Meeting Time: 2020-10-19T20:00:54Z

In this session, we review the for-loop, which is the next control structure. This is the last control structure we will need for a while.For-loops are pretty easy to use in Python, and most students…

Divide-and-conquer is not the only example of recursion. It just happens to be one of the most interesting. But in this video we show that even some of the simplest of recursive definitions become…

Now that we understand divide-and-conquer, it is type to implement it in Python. In this video we show you a three-step sequence for writing a function definition using this technique.

Recursion has many, many uses. But one of the most popular applications is divide-and-conquer. In this video we introduce this new concept and show how we will use to solve several problems on…

Lists are mutables and support mutable functions. Many of these mutable functions contain for-loops. As we show in this video, this changes how we write the for-loop. In particular, we will not use…

In this video we introduce a new control-structure: the for-loop. This control structure is specifically designed for processing iterable types like strings, tuples, and lists.