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Hi there.

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All right, so I think it's time to see the resolution for the homework assignments regarding objects.

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00:00:20,690 --> 00:00:27,670
OK, so once you open your chance, create a new module and then we'll start off with showing on the

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answers.

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OK, so basically what we need to create here is a class.

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All right.

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And the name of the class would be car.

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And then we have the Init method, which is identified, first of all, with a key word def.

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Then you have double on the score in it, double under score, and then the self is either completed

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automatically.

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And then we're going to receive one argument here, which is car data list as asked in the assignment.

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And here we're going to have the self parameter and then we have car data list.

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OK, same as we declared it one line above and like that.

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OK, so basically what we have here is the Init method.

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It receives this list and it's converted here into a property of an object of a future object as we're

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going to create now.

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OK, now we're going to create the classes methods.

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OK, first of all, we have insurance calculation.

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All right.

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And we're going to leave it empty for a second.

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And we have their doors closed method, which would tell us whether the doors are closed or not.

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We're going to leave them empty for a few moments.

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And then we have also def get car data.

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All right.

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So these are the classes methods.

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OK, and then we were asked to create two lists for first.

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One is least offered and we have four, the focus list and then we have year of release, current Price

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and Ford Focus, which is the name of the car.

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The last one is the status of the doors.

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OK, also we're going to create an instance of an object which will belong to the car class.

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OK, Ford Focus, for instance, and it's going to belong to the car class.

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And here we go into place or basically, in other words, to pass this list inside.

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So what we completed this at this point is we created a list here.

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We passed the list into the instance, OK, to this instance for focus.

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And this list was went up inside into the Init method and up in here and then here.

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And then it can be used in each of these methods right here.

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All right.

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And we can create an additional an additional list for Audi three.

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This is an instance of Ford Focus.

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Right.

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And we can create an additional list off the list of ality.

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OK, just make it a capital here.

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And we have Audi A3 list.

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And in here we have what do we have here, we have 2011, 15 thousand Audi A3

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and then we have a false for the Dumbledore's status and the same, we're going to create instant's.

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Of Audi A3 and we have Audi A3 instance

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and I'm sorry, and then like that, and also it belongs to car and we're going to pass this list inside

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this instance right here, OK?

49
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So wherever we're going to initiate this instance, this list would come in use and these methods.

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And once we once we take this instance and we take this one into use.

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So this list would come into use in this method as well.

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OK, so we came up with the framework, you might say, for that class instances and the list, which

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is the arguments which are passed into the instance.

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OK, and now let's go back to the top right here and start making calculations as we expected.

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All right.

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So first of all, we have self car data and this is our list, OK, so we can extract values out of

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our list.

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Once we mention self that car, there is a list, index zero.

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So if we are using this instance, OK, so we're going to use two thousand five.

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And if we are using this instance, sorry, if we're using this instance.

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Yeah, we're going to get 2005.

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And we if you are using this instance, we're going to get two thousand twenty eleven.

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All right.

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So we can basically pull out or extract values out of the past list which were passed into the instance

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of an object.

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Right.

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But the developer that will come after after us and we'll read our code will not specifically understand

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what this means.

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And he will need to go backwards compatibility and see like what this thing means.

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And he will need to go over here and then back here and see what this thing means and this thing means.

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All right.

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So we want our co-workers life to be easier.

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And for that, we can create the following thing.

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We can create appropriate variables as such and assign these values that value to the variable.

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And that way it's more much more readable.

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All right.

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So we have car price, which is self car.

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They the list index one.

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And we also have the model that is self car.

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The list to OK, so we have index one, which is car price.

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You can see it right here, car price.

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And you have the model which is index two and you can see it here and here.

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OK, and these two lists, this one and this one passed into the instance.

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Right.

85
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So we have these variables for our disposal and now we can start calculating.

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OK, so the assignment said that if the year off.

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Year of release is small or equals 2020, but from the other hand, it's also OK, it's and year of

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release is bigger or equals from 2010, right.

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So we have this statement right here.

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Basically, what we are saying is if the year is smaller than 2000 is in 20, but I'll have a mistake

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here, but bigger than 2010.

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And we also need to take into consideration the car price, which will get to it in a second.

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But you can see here it continues yellow line below the statement that I mentioned here and say that

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if and if we just click it and hover, then you can see that Pichon tries to tell something which is

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very smart and tries to teach us stuff all the time.

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So you can see simplify chain comparison.

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Basically, pie chart tells us that we can simplify the statement and I'm going to use it.

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You see here the yellow light just going to click it and then simplify chain comparison.

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Then once clicking it, boom.

100
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OK, I can see that the comparison statement is shortened and it's much more simplified.

101
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You can see.

102
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No, and then the comparison and then you can see the value.

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And it's basically one long statement, but it's much shorter than what we have with the end operator

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and this is much easier to understand.

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OK, so looking at the assignment, we need also to take into consideration the car price and basically

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we're going to do the same thing.

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We're going to compare the car price, which should be bigger or equal to six thousand.

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But from the other hand, it should be smaller than seventeen thousand like this.

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And then we're going to create a new variable and you can call it calculated insurance.

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And we were told that the car price multiplied by five percent.

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All right, this would be the calculated insurance, OK?

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So this way.

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Just a second.

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Like this, OK, so if the rear of the car is between 2000 and 2020 and the car price is to be between

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six and seven, 17 K, so the insurance price should be five percent out of the car's price like this.

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So this is the insurance price and all other options else.

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The calculated insurance would be car price multiplied by zero zero seven, which is seven percent of

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the car price.

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And what I would like to do now is also to print the insurance calculated.

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Insurance.

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Is and we're going to use string formatting here, so we're going to use the percentage and then after

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closing the quotation mark, we're going to put additional percentage and then the calculated variable

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and then it will be put out from here into here.

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All right.

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So we finished this method, completely done with it.

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OK, and now we can go over to the next method.

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We can also use, like calculate the insurance price is calculate the insurance price.

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For the model.

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OK, so I'm just going to mention here the name of the model, and because we're going to have two variables

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mentioned here in the print, so we need to have round the brackets here, OK?

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So that way we can put divided by a comma self.

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We don't need the self because it's a local variable model like this.

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So then this variable will be put out here and this variable would go up in here.

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So I think we're good with this method.

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We are done with it.

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All right.

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And then we're going to discuss now of doors closed method.

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And in here, things are pretty simple.

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We have those those status, which is a new variable, and we are going to pull out the last value out

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of the list.

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OK, so we have this list and this list and these both lists are passed into the unit method.

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So we're going to use the list, OK, from here.

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And you can see by going backwards up to the list, the original list that you can see, the last variable

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in both lists indicates the door status in the cards.

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So we can either mention here index zero.

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One, two, three.

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Right.

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You can either put here and the number three, we can either mention minus one, if you recall, it

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means that we're going to extract the best value out of the list.

150
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OK, so this is Dorje status.

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And then if Dorje status equals equals true.

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Yeah.

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Then print doors are closed.

154
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OK, and then if you know what, let's start off with alse Dawes status falls and then we can put doors

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are open.

156
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Right.

157
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Well partially.

158
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Partially this answer is correct.

159
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Just a moment.

160
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I don't need it.

161
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OK, sorry about that.

162
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So, like, OK, this statement is is actually partially correct, because basically what I did here

163
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is saying that if I had a true OK, if I had a true inside this cell.

164
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So doors are closed and our doors are open, basically it sounds right, but it's not completely right.

165
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OK, because think of the third option.

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If here I'm going to put B, C, OK, not boolean variable, true or false, and God is going to put

167
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a wrong value.

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ABC and considering this ABC here, once we were going to execute this method.

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So we're going to get those are open, but it's not actually open because it's not a true it's not a

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false false argument here.

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So that will be completely wrong.

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So in order to fix this situation of getting false values here and false printouts, we're going to

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do small change.

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Right.

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So are going to do alif door status false.

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And then we're going to have those are open, OK?

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And then we're going to have alse and we're going to print wrong value incertain.

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All right.

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So in this case, once we have ABC and gets up in here, so we're going to check whether it's true,

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whether it's false and if it's neither of them is going to go up to down to the house and print out

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wrong value, insert it.

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OK, this is the most correct answer.

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And also, if you're going to be asked in interviews, which I'm sure you're going to be asked about,

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like to write some kind of, if else statement, make sure that you cover all options and not just most

185
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options, because if you want to be accepted into a certain position, you need to be accurate.

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All right.

187
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So this is an accurate answer.

188
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OK, so let's erase it and put through here again, as it was before.

189
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So we already covered this method as well.

190
00:15:50,390 --> 00:16:02,350
And now I'm just going to print out the car model is percentage as it was released and the year.

191
00:16:02,960 --> 00:16:10,940
OK, I'm not sure that I'm correct regarding all the like, commas here and all that, but I guess this

192
00:16:10,940 --> 00:16:18,350
is the the hang of the assignment of the printout just to use variables and use string formatting on

193
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a couple of variables.

194
00:16:19,670 --> 00:16:19,970
All right.

195
00:16:20,390 --> 00:16:25,640
So I'm just don't remember the accurate sentences I asked you to print.

196
00:16:25,830 --> 00:16:29,240
OK, but I guess it's something like that, OK.

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And the year percentage.

198
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Yes.

199
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And it costs.

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Percentages and then outside of quotation marks percentage.

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Brackets, and then we have self.

202
00:16:44,790 --> 00:16:53,760
This time, I'm going to have the lazy answer, just going to use that the sales of the of the list

203
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without setting up appropriate variables, but it's also the same.

204
00:16:57,930 --> 00:17:04,380
Just want you to see several types of approaches for each answer, OK, for each method so you can see

205
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here self khaleda one.

206
00:17:06,540 --> 00:17:10,170
OK, so let's go over what I wrote here.

207
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All right.

208
00:17:10,860 --> 00:17:17,520
So the car model is OK, we have index to 012.

209
00:17:17,520 --> 00:17:20,280
So the car, the car model is for focus.

210
00:17:20,280 --> 00:17:28,650
For example, it was released that the year off in zero was released at the end of 2005 and it costs.

211
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Five thousand.

212
00:17:32,830 --> 00:17:34,690
So I think we're good here as well.

213
00:17:35,650 --> 00:17:40,000
OK, so we have completed all the methods, content.

214
00:17:40,000 --> 00:17:47,230
And now let's let's, uh, let's try to execute the methods, because here the bottom part, which is

215
00:17:47,230 --> 00:17:52,570
outside of the glass we just declared, list an instance of an object.

216
00:17:52,580 --> 00:17:59,920
But we did not mention the execution of these methods using these instances.

217
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Right.

218
00:18:00,430 --> 00:18:01,510
So let's do it right now.

219
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OK, so execute methods for Audi, not out its Ford Focus instance.

220
00:18:11,800 --> 00:18:13,530
So we have Ford Focus, for instance.

221
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That first one is what, insurance calculation?

222
00:18:18,010 --> 00:18:22,620
OK, and then we have Ford Focus instance and we have doors closed.

223
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Yeah.

224
00:18:24,070 --> 00:18:27,850
And the last one is Ford Focus and we have great car data.

225
00:18:28,340 --> 00:18:36,280
OK, then in between before printing printing out Audi outis execution of methods, I'm going to use

226
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the special keyword which is slash.

227
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And so the printouts will be divided so it won't get mixed up.

228
00:18:44,000 --> 00:18:47,290
OK, so in here we're going to execute.

229
00:18:50,920 --> 00:18:57,580
Methods, oops, methods for four for Audi A3.

230
00:18:57,970 --> 00:19:06,220
Right, so just going to copy all of this and just change the name of the instance for Audi three one

231
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to three.

232
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And we are done.

233
00:19:10,830 --> 00:19:15,120
OK, now let's try to run it and pray that everything's going to be fine.

234
00:19:16,150 --> 00:19:16,870
Where is it?

235
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Car practice answers right here.

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All right, so there you have it, so calculated, an insurance price for Ford Motor four for the model

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for Focus is three hundred fifty doors are closed because they are closed.

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It's true.

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The car model is for focus.

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It was released for Gothia, a D.

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Let me just run it again, OK?

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It was released at the year 2005, and it cost 5000, which is correct, and calculation for the insurance

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for all the eight three.

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Seven hundred fifty doors are open.

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OK, because the status of the doors is false.

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It means they are open.

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And the car model is Audi three.

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It was released at the year of 2011.

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And it cost two thousand.

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It costs fifteen thousand.

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So there you have it.

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You have coverage of creating a class, OK, creating an init method, using methods of a class.

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All right.

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Farseeing an argument which is a list into the math, into the instance of an object creating an instance

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of an object and executing the methods.

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So we basically covered all topics related to creation of an object and using all of its features.

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And I think it covers this topic pretty much completely.

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I will see you in the next videos and we'll discuss further about object oriented programming.

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Thank you and bye bye.