‫Welcome back.
‫I kept mentioning this key term iterable, but what does it really mean, Iterable?
‫You're going to hear that over and over in Python programming and other programming languages as well.
‫And as we discussed a little bit in the previous video, edible simply means it is an object or a collection
‫that can be iterated over.
‫So again, an iterable can be a list, can be a dictionary, can be a tuple, can be a set.
‫It's a collection of items.
‫We also saw that a string could be iterable.
‫Now these things are iterable y because they can be iterated.
‫That is iterated means that we can go one by one.
‫To check each item in the collection.
‫And you're going to hear this over and over when talking to Python programmers.
‫So you want to make sure that you have that vocabulary.
‫You're iterating over something.
‫You're looping over something.
‫So iterable is the noun and iterated or iterate is the action of iterating over an iterable.
‫I know it's a little confusing now.
‫Now many objects in Python, like I said, are iterable, but there's a few special ones that we haven't
‫covered yet.
‫Specifically dictionary.
‫We saw how lists, tuples, sets and strings can be iterated.
‫But what about an object?
‫Let's say we have an object here, and this object will be users and users or user.
‫We'll have a name of Gollum.
‫We'll have age of 5000, six columns, pretty old, and then we'll say can swim.
‫Gollum, let's say, cannot swim.
‫False.
‫What if we use this object right here?
‫For item in user and we print.
‫Right here.
‫The item.
‫What do you think will happen?
‫Let's run this.
‫Well, I got an error because I forgot a semicolon here.
‫And we don't want eagles.
‫We want semicolon.
‫And then obviously this needs to be a string as well.
‫Now if I click run here.
‫Look at that.
‫I get name, age and can't swim.
‫So I've printed the keys of the dictionary.
‫Now this dictionary.
‫We have the keys.
‫That's great, but.
‫Hmm.
‫What if I wanted?
‫Actually, the values.
‫Is there a way to do this?
‫Well, dictionaries have three methods that are really, really useful when we want to loop over their
‫keys and values.
‫The first one is items.
‫And with items when I do this and I click run.
‫You'll see that I get the key value pair in a tuple.
‫And this is a very common pattern that you'll see a lot.
‫Another one that we have.
‫Is the values.
‫And guess what?
‫That does.
‫That gives us the values of.
‫The dictionary.
‫And we saw that user just leaving it blank gives us the keys.
‫But we have a method that is more descriptive and allows us to show exactly what we want to do, which
‫is keys.
‫And if we run this.
‫You'll see that I'm able to iterate over the keys.
‫And these three methods are very common, and you're going to use them a lot in your programming career.
‫So make sure you take note of them items, values and keys.
‫It allows us to iterate over dictionaries.
‫But another interesting thing that you can do and another common pattern when iterating over dictionaries
‫is what if you want to print, for example, separately the item's name and column.
‫So right now we're returning a tuple and we saw that we can do tuple unpacking, right?
‫I can say key value equals item and then just print key value.
‫If I run this.
‫You see that?
‫I'm able to print these.
‫But there's actually a shorthand way of being able to do this in here in the for loop, I can say key
‫value.
‫And just completely avoid this entire line.
‫And if I run this.
‫There you go.
‫It's still works.
‫And this, again, is a very common pattern where if you're collecting the items of a dictionary, you
‫can separate them into value or you might even see shorthand, K and V.
‫Again, these can be any variables that you want.
‫You can name them.
‫Whatever helps your code be more readable.
‫By the way, just for fun, let's say in the last line here, I want to iterate over the number 50.
‫What do you think will happen then?
‫If I click Run.
‫Sorry.
‫Name her.
‫Name Key.
‫Oh, I get an error here because I haven't changed these, so let's change these back.
‫That's not the error I was expecting.
‫The error I was expecting was this.
‫Type error int object is not iterable.
‫Now this error should make sense now because I've said it over and over.
‫Why is it not Iterable?
‫Well, because it's not an object that can be iterated over.
‫It's not a collection of items because we learned that in Python.
‫These are Iterable.
‫I'll see you in the next video.
‫Bye bye.