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Lesson 20.9 Optional Arguments

Unlike other programming languages, a Python class has only one constructor, If we want to give the user more flexibility when creating objects, we should make certain arguments optional. In this…

From  Hannah Lee on October 27th, 2020 2 plays

Lesson 20.7 Intializers

In this video, we introduce the most important method definition in any class: the initializer. The initializer is responsible for creating all the attributes so that the user does not need to worry…

From  Hannah Lee on October 27th, 2020 5 plays

Lesson 20.6 Method Visualization

Methods definitions look just like function definitions, but we call them differently. In this video we show how to visualize a method call, and we see just how it differs from a function call.

From  Hannah Lee on October 27th, 2020 5 plays

Lesson 20.3 Classes and Attributes

The primary role of an object is to store attribute variables. In this video we demonstrate the easiest way to add attributes to an object. We see that we can also add attributes to class folders as…

From  Hannah Lee on October 27th, 2020 5 plays

Lesson 18.4 Nested Slicing

Slicing a list creates a copy. In this video we show what this means for nested lists. In particular, we show that sometimes a copy is not really a copy after all, and that we have to distinguish…

From  Hannah Lee on October 27th, 2020 4 plays

Lesson 18.3 Tables

A table of data is one that is divided up into regular rows and columns. In this video we show how to represent a table as a two-dimensional nested list. While there are alternate ways of…

From  Hannah Lee on October 27th, 2020 4 plays

Lesson 18.1 List of Objects

Lists require that we explicitly show the folder when visualize them. In this video we show what that means when a list contains other objects that have their own folders. The result is a chain of…

From  Hannah Lee on October 27th, 2020 5 plays

Lesson 17.9 Recursion and Objects

Divide-and-conquer is not just limited to sequence types. In this video we show that it works on some objects as well. Specifically, we use it to process a family tree.

From  Hannah Lee on October 19th, 2020 18 plays

Lesson 17.2 Recursive Functions

In this video we show how to take recursive definitions from mathematics and implement them in Python. To do this, we will need to have a function call itself in its own definition.

From  Hannah Lee on October 19th, 2020 19 plays

Lesson 16.6 Mutable For-Loops

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…

From  Hannah Lee on October 19th, 2020 13 plays

Lesson 16.4 Range-Based For-Loops

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…

From  Hannah Lee on October 19th, 2020 18 plays

Lesson 16.3 Accumulators

One of the techniques that we say in the previous video was the accumulator variable. In this video we show that this is a general technique used in a fruitful function that requires a for-loop.

From  Hannah Lee on October 19th, 2020 16 plays

Zoom Sep. 24. Conditionals

In this session we review conditionals, focusing on how we visualize them. This will be important for the second assignemnt.Conditional assignments will not be necessary for Assignment 1. In fact,…

From  Hannah Lee on October 10th, 2020 1 plays

Lesson 15.8 Slice Assignment (OPTIONAL)

This video introduces an advanced topic that is completely optional and will not appear on any exam. Lists don’t just allow us to use a single position in an assignment statement. We can also…

From  Hannah Lee on October 10th, 2020 4 plays

Lesson 15.5 Slice Visualization

Because lists are mutable, we need to explicitly draw their folder when we visualize them. In this video we show how slicing affects these folders.

From  Hannah Lee on October 10th, 2020 14 plays

Lesson 15.4 List Assignment

The big advantage that lists have over tuples is that they are mutable.In this video we show how to write assignment statements that modify the contents of a list.

From  Hannah Lee on October 10th, 2020 14 plays