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Hello and welcome to this video.

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In this video I'm going to show you how to create a tuple using a tuple constructor.

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This involves using double parent theses to create a tuple using a tuple constructor or you first need

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to give the tuple a name.

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So I'm going to create a tuple I'm going to call it animals and then I use the equals to and then I'll

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type in the word tuple and then I'll have double parentheses.

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And inside the inner parentheses is where I will add the values I want to be in my two pulsars say a

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lion under a comma add another one.

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I'll say Taiga do comma and add one more let's make this one A.

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So that basically creates the tuple using a tuple constructor.

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So again if you want to print this out on the screen we can do is use a for loop to look through them

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or we can just use the print statement to just print the tuple so we can just say print inside the parentheses

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for the print statement.

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We just type in the name of the tuple and then we save us the file using control s..

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Now if I open my command prompt if you're on a Mac you need to use the terminal.

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So this is my command prompt I'm just going to type the name of a file which is on my desktop.

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You can see I've navigated to my desktop so I'll just call the file which is called My on this code

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tuples to p y that you just print out the values of the tuple so you can say it's got lion has got Tiger

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and it's got the bear.

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You can also access the individual values in the tuple again by using the index lion will have an index

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of 0.

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Tiger will have an index of 1 and they will have an index of.

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There is a special method you can use.

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If I wanted to find out the length of the items in my tuple I could just do a print statement or a print

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inside the parentheses I type in Len method and inside that I will just add the name of my tuple which

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is animals.

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So I'm just going to comment out.

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Line number two.

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I don't want line number two to be printed out.

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I just want the line number three executed.

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So just to control s to save and open up my command prompt.

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So I'm just going to clear this screen and now type in the name of the tuple which is my on the score

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tuples in the P Y press printer.

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I can see he is giving me is return 3 which means the length of the elements in my tuple is 3.

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So lie on 1 2 3.

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Once you create a true pool you cannot modify it.

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The only thing you can do is delete it.

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If for example if Pa tried to add to my tuple I will expect to get an error or say if I say animals

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which is the name of my tuples and I will use a method called add so to add.

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And then inside the parentheses I'll add the value of what I need to add.

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So let's say I want to add dog to that to pull just the way I was represented by I expect the code to

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error because you cannot change a tuple once you've created it.

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So if I do on a print statement here and say print animals I will expect this line of code to error

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because you cannot change the tuple once it has been created.

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So let me open up my command prompt again.

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I just typing.

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That's the name of the farm which is this file here.

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If I press Penta you can see it will execute this line of code which prints the lamp which is three

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but you can see the line for it did not execute it did not execute line 5 because of the error.

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Let me show you what the Arrow says is say attribute error tuple object has no attribute at.

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Okay so we cannot add to a tuple.

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You cannot also change the value.

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So let's say 5 put a comment here and then I come here a typing animals animals.

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All right.

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I say the.

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Let's say we have Lion horn in there.

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0.

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I want to change that to let's say a cheetah

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not sure that's the right spelling but.

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Okay.

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And then I'll save control.

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Yes.

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Now if I tried to run my python file again I expect there to be an error from line number five and six

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because I'm trying to modify an existing value but it's not going to let me do that.

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So I press enter.

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He can see Prince three here which is line three of the code.

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It executes that.

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OK.

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No problem.

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Line 4 I commented out I'm 5 and 6 giving me an error.

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He can see it says here type error or tuple object does not support item assignment.

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So I'm trying to reassign a different value to an item that's already in the list.

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It will not do that.

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The only thing you can do to a tuple once you've created a tuple is delete it and you can delete it

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just by using the keyword DL followed by space and then the name of the tuple you can see on line six

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here.

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I am deleting the tuple.

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I've also commented out all the other lines of code.

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That means those block of code will not be executed.

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So I'm just gonna do a control as to save now a file run this file.

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I expect to get an error to tell me that that does not exist.

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All right.

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So you can see here telling me here.

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Name arrow animals is not defined and that is because I have deleted the tuple on line six here.

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So that's it for this video.

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Thanks for watching and bye for now.