Search for tag: "dictionary"
Lesson 29.3 Generators RevisitedIn the previous video, we said that generators are a type of coroutine. In this video, we explore this idea. We use yield statements to write generators that are a little more sophisticated than…
From Hannah Lee
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Lesson 28.9 Dictionary Comprehension (OPTIONAL)This video is not optional because the material is advanced. It is optional because this video series has run long and this topic is less important for you to know. While we have not talked about…
From Hannah Lee
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Lesson 24.3 Dynamic Attribute AccessTypes guarantee that an object supports a set of operations (methods) and has a certain set of attributes. However, in this video we show that we can actually get this information without typing an…
From Hannah Lee
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Zoom Oct. 27. Nested Lists and DictionariesThis presentation explores the last built-in (as opposed to user-defined) types in this course. These types are often used to store data in files.We actually had an (accidental) sneak peak at these…
From Hannah Lee
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Lesson 19.8 Keyword Expansion (OPTIONAL)This video introduces an advanced topic that is completely optional and will not appear on any exam. Keyword expansion is the dictionary version of tuple expansion. It is used in modules like Kivy to…
From Hannah Lee
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Lesson 19.7 Mutable Table FunctionsDictionaries are mutables and support mutable functions. But this is a case where dictionaries are slightly different from lists. We are allowed to loop over a dictionary as we modify it, so long as…
From Hannah Lee
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Lesson 19.6 Immutable Dictionary FunctionsSince we can loop over dictionaries, that means we probably want to use them in functions with accumulators. In this video we show how to do this and why they are not that much different from lists.
From Hannah Lee
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Lesson 19.5 Dictionaries and For-LoopsDictionaries 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…
From Hannah Lee
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Lesson 19.4 Nested DictionariesIn this video we show that we can nest dictionaries just like we nested lists. In fact, a lot of real world data is represented this way. We show off a particularly complicated JSON file that…
From Hannah Lee
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Lesson 19.3 Dictionary VisualizationSince 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…
From Hannah Lee
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Lesson 19.2 Dictionary AssignmentDictionaries are mutable. In this video we show how to alter there contents. This includes reassigning the value of a dictionary for a given key. But it also includes adding and deleting keys.
From Hannah Lee
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Lesson 19.1 Dictionary ExpressionsIn this video, we introduce a dictionary as a collection of key-value pairs. We also show how to write a dictionary expression in Python. It looks just like a JSON string, but without the quotes.
From Hannah Lee
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