#100DaysOfCode in Python Transcripts
Chapter: Days 7-9: Python Data Structures
Lecture: Concepts: what did we learn
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So that's Python data structures.
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I hope you enjoyed that little overview of lists,
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tuples, and dictionaries.
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For the next couple of days, you will be working
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through the exercises outlined in the three-day overview
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which was the second video for this lesson set.
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But before we get to that, let's just quickly
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quickly recap everything we've done.
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So for lists, lists can be sorted with sort, go figure.
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And then worked through how to iterate
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over a list using a for loop.
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We also discovered pop.
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Okay, if we remember, pop just returns the item
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in the index specified.
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It actually removes it from your list
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and then returns it.
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del simply deletes it from the list,
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doesn't even return it.
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insert does exactly as its name implies.
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It will insert the second argument
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into the index specified in the first argument.
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And then append will just tack whatever it is
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right on to the end of the list.
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Now immutable tuple, okay, we know that this means
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we can't edit, it can't change, okay.
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So we've got a tuple.
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We've created it using tuple itself, okay.
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Now we print out the contents just so you can see
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that we have the six items in this tuple, my name,
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the letters of my name.
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And then when we try to manually override it
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with a simple list substitution there,
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t[0] we're going to assign the letter m
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and then we get the fact that it's a type error,
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it's a tuple.
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You cannot change it, it's immutable, okay.
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Now onto dictionaries.
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We created it manually.
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We manually created a dictionary, okay, simple.
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And then this is how you return the keys using .keys.
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Okay this is just the keys at the front, just the names.
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Then we returned the values in the same way
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that we do with the keys.
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We can get just those values, the 30 and the 33s.
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And then we can get everything as a whole.
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We can get each item, so the key and the value.
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We can do that using items().
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And then we showed you how to iterate over,
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over the item itself so we can get the keys
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and the values, not just one or the other.
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And using a forloop, we can then substitute those keys
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and values into some sort of a string,
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into some sort of text.
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And that's really useful, something you'll probably do
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quite a lot.
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Okay, your turn.
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So for this next couple of days,
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as we discussed in the ReadMe earlier,
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we are going to work through the code challenges bite
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that you have a free code for so go ahead and use that.
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And then for day three, you're going to work
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through that data.py file which in the repo.
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So if you have any sort of thoughts on that
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or any confusion on that, just head back to video two
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where you look at the ReadMe and there's a good
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explanation there as to what you're going to do
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for days two and three.
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So that's Python data structures.
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I hope you enjoyed it.
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Keep calm and...
