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[no audio]

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Friends, in this video

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we are going to discuss about the next data structure,

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that is tuple data structure, right.

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See let me show you how to work with tuple,

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I mean how to define, and how to access your values of your

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tuple, right, how to do some operations on your tuple data

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structure. First thing

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let me define.

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So how to define your

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[no audio]

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tuple, right?

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See guys you can define your tuple, you know,

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like 'my_tuple', 'my_tuple', any variable name you can

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take but I am taking simply 'my_tuple', (3, 4, 5),

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and if you want to define any empty tuple, right,

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[no audio]

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'my_empty_tuple=', this set.

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Right. Now, let me save this as some python script, and I want

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to run something here,

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so 'working_with

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[no audio]

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_tuple'.

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Fine.

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So first thing, how you can print your tuple? Simply by variable

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name. See the output. Or how you can print your empty tuple?

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Whatever the variable you have for that,

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that's it. Now see the output.

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[no audio]

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Right. Now, let me convert your

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tuple into Boolean.

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So first I am going to convert my empty tuple into Boolean.

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You know the empty list if you convert into tuple, what you

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are going to get? The Boolean data as 'False'. Same way here

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I am converting my empty tuple into Boolean.

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Now you're getting 'False'.

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Let me convert some non-

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empty tuple into Boolean. Non-empty is nothing but already you have

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your tuple, right?

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See the output. 'True', right.

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So if we convert any empty tuple data into a Boolean you

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will get 'False', or if you convert any non-empty tuple data into Boolean

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you will get always 'True'.

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Right. Fine.

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The next thing is,

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[no audio]

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so I want to define a tuple

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[no audio]

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such that 'my_tuple' consists of different values,

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and in that one of the value is a list.

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Yes, you can. I mean suppose sometimes if you, based on requirement,

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you can also define your tuple in this way.

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Let's say (3, 4,), instead of 5, the third element

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I am taking as a list, no problem you can take it.

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[no audio]

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Right. Now, let me define,

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let me print my new tuple data. See the output, what you are getting.

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[no audio]

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Now guys, you know how to access your elements from your

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list based on index, the same concept is applicable even while

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working with your tuple.

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You can access particular value from your tuple.

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Let's say I want to access number 4. So, you know, if you

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go with the positive index, the number 4 index is 1, right

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because 3 is 0, then 4 is 1, then this entire thing is one element guys.

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This entire thing is one element for your main tuple.

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So that's why for this entire list, index is 2. Now,

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this is 3 and this is 4.

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Right. Now let me print something, 'print', your tuple with index 0.

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[no audio]

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See the output, what you are getting. You are getting first

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value. Let me print tuple value on index 1. Now see the

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output what you are getting.

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Let me print the index value 2 from your tuple.

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That is the list of value. See the output what you are getting,

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[5, 6, 7]. Now from this if you want to get, right, suppose

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6, number 6 I need to get. So if you want to get 6, first

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thing you have to get this element, that is the list.

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Yes, we are getting that with the help of index 2. Now from this,

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from this you need 6 value.

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That means again you have to take index 1. Now see the output

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what you are going to get, 6. So be clear guys.

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If you want to access digit 6, first of all from your main

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tuple, this is your main tuple, from that tuple first

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you have to get this element. To get that element

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we are taking index as 2, because positive index 0, 1, 2. Now,

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this is like one list, right. From this list

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if you want to get second element, you have to take index as 1.

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That's what I did.

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[no audio]

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Fine. Now, let me assign from my tuple, index 0 value something

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is there, I want to modify that with some other value

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let's say in this way. Observe that whether it is possible or

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not. You are getting an error.

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'tuple' object does not support item assignment, that means

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once if you define the values in your tuple, you cannot

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change any values or item in your tuple.

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That means tuples are immutable. Assignment modifying the

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part of your tuple is not possible.

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[no audio]

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But modifying the entire data is possible, like your

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strings also, right. Even in your strings you can modify entire

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string, but you cannot modify the part of your string.

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Same rule is applicable with your tuple as well.

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Right. So it's very, very important guys. Tuple

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and strings are immutable. That means once if you define you

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cannot change the part of your tuple or string, that's it.

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Now tuple is not able to do, I mean you cannot

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perform any operation such that

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whatever the operation you are using, right, that operation

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is not going to modify your tuple.

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That's why you are saying tuples are immutable.

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That's why if you see the operations on your tuple, there

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are not much operations on your tuple.

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Let's say I am defining tuple called (4, 5), and see

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the operations on your tuple, only 'count', and 'index' operations.

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You don't have like append, insert, update,

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I mean top, remove, extend, those all are there with your list,

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right? Let's say I have a list of data,

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[no audio]

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so on that I am trying to find the list of operations. See

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that you have index, extend, sorry, index

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anyway it is there with you in your tuple also, right, index and count.

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Other than that, you don't have any operations like remove,

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sort, right, insert, extend, copy.

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[no audio]

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So that means, once if you define a tuple you cannot modify

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it, right. Now, you know how to use your 'count' and 'index'.

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What is the purpose of 'count'? If you have a tuple like this,

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something like this,

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so how many times particular letter is there, particular number

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is there, particular data is there in a given tuple?

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Let's say I want to find 5, how many times it is there?

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Right. Let's say I define one more 5 now, and check it, 2 times.

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Then what is the index of number 5?

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0. So is there any number 5 after index 1, sorry after

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index 0? Because very first index is number 5, right?

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I don't want to look for this

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other than that. From here

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I want to look, is there any 5, then provide the starting

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index from where you want to look?

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Yes, it is there somewhere in fifth position.

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That's it, and you can find length of your tuple, guys.

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See that six letters are there, I mean six data are there in your tuple.

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So length is applicable to your strings, list, and tuple, right?

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Let me show you once again.

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If it is a 'list' then length of your, sorry, if it is a string,

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then length of your string.

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Let's define some list,

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then length of your list.

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Let's define some tuple,

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[no audio]

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then what is the length of your tuple? That's it.

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[no audio]

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Okay. So guys you can access based on index your tuple

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values as your list, right?

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I mean already we've done this thing

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no, let me do it once again.

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[no audio]

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Come here. Let me define 'my_tuple' in this way.

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Any tuple, no problem. Right.

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[no audio]

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Now, you know what is the use of 'tuple:',

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same operation as your list, and string. You're going to get

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entire tuple, but I want to get from index 0 to last, same

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thing. But I want to get from index, third index to last. Third

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index means, 0 index is 3 number,

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this is second index, and this is the, sorry 0,

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1, 2, 3, 6 is the third index, from 6 to last I want, then

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I can take in this way.

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Right. So guys, whatever the index operations we performed on your

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strings all or applicable here as well.

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Let's say I want to get from starting to 5th index value. If

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you want to get 5th index value we have to provide 6, right?

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See that.

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1, first, 0, 1, 2, 3, 4, 5, 6,

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[no audio]

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if you take 6th index, you're

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getting up to five values,

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sorry six values up to 5th index, right?

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That's it. Now,

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let me take one more thing,

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last operation,

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[no audio]

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one second.

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[no audio]

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So that is simply 'print(my_tuple)' from third

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index, 3 values. From third index 3 values. Then 3 plus 3, 6

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you have to provide or from third index

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I want to get two values only, 3 and 4; 3 and 4.

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That's why 3 plus 2, 5. Now

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if you observe the output you are getting two values as a tuple.

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[no audio]

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Now we have last explanation with your tuple, that is,

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[no audio]

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see suppose if I write 'x=5', then 'print(x)', and then 'type(x)',

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see the output. Integer, right?

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But I am giving ',' here. Now see the output.

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'Tuple'. So if we write 'x=5,' that is a

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tuple which consists of only one value.

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[no audio]

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And also you can use something like this.

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This is also valid tuple. 5, 8, 9, means a

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tuple which consists of three values. See the output. You're

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not getting any error.

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If you write in this way, by default it will become a

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tuple data structure.

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You need to remember this point.

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Okay, single data tuple is you can write something in this,

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some number, but if you don't write ',' it will become a integer

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data, integer variable, but it is not a tuple data structure

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variable. If you write ',' then it will become a tuple data

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structure variable. Right.

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So guys, these are the important points with your tuple.

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Guys, as of now we have seen a list data structure and

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tuple data structure.

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So you need to remember that lists are mutable. Whenever if

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you want to change the data of your list, any part of your

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list, you can change it, but you cannot change the

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part of your tuple.

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That's why lists are mutable,

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and tuples are immutable,

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okay. Then what is the usage of your tuples and

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lists in your real life?

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[no audio]

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See you are designing some python script,

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right, and you are taking some data.

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So while taking data

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by logic if you want to change your data, you have to take

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your data as a list.

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Even by mistake if you don't want to change your data then

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simply consider your data as a tuple.

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And we'll see that situation with the help of an example

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once if we complete with your basic concepts.

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So up till that you have to wait.

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So up to that you have to remember simply tuple immutable,

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lists are mutable. That's it.

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Okay. Okay guys, thank you for watching this video.

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[no audio]