Search for tag: "range"

Sorting algorithms can be quite sophisticated. In order to understand them, we need some way to visualize them. In this video, we introduce horizontal notation, which is a way to track how much of a…

Generators look like normal functions, but they do not behave like them. In this video we show how to visualize them, using the Python Tutor.

In this video, we show how to make our own iterable and iterator classes. These are actually tightly linked, and you need one to create the other.

We are familiar with iterables, types that we can use in a for-loop. In this video we introduce the iterator. This is a type that can be used in a for-loop, but we can also manually step through the…

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…

We can always replace for-loops with while-loops, but should we? In this video we talk about the trade-offs of the two control structures and why it might be better to use over the other.

While-loops require additional patterns beyond the simple accumulator pattern that we used in for-loops. In this video, we talk about the first such pattern, which is replacing the range iterator.…

Up until now, the only way that we knew how to create an error is with an assert statement. But these always create errors with the type AssertionError. In this video we show how to create errors…

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.

Dictionaries are not sliceable, but they are iterable. In this video we show the many different ways you can use a dictionary in a for-loop. The primary thing to understand is that you have to…

Since dictionaries are mutable, we must represent them with folders. In this video we show what these folders must look like. In doing so, we see that they look suspiciously similar to other folders…

In this video we show how to write a mutable function on a table of data. Once again, this is very similar to writing an mutable function on a traditional list.

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…

Sometimes we need to perform a calculation on a string, list, or tuple, but we do not want to loop over this value. Instead, we want to loop over the positions of the value. In this video we show why…

Strings, lists, and tuples are not the only iterable types. In this video we introduce the range function, which creates another iterable value. This is going to allow us to do several things that we…