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[no audio]

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Friends, here we are going to use your for loop

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for your strings, list, tuple and dictionaries.

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Already we have seen how to use your loop for string, list, tuple, right,

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but here I want to show you once again with small

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modifications, right?

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Anyway, there is no modification with your string.

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Let me write a simple Python script just to give overall

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idea with your for loop to use for your different data structures

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and data types.

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Let me take 'loops_for_data', something like you can take any

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script name right, '_structures.py'.

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First of all, let me take my string as anything, 'my_string'

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"working with

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[no audio]

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for loop".

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Directly you can print your string.

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Right. You can get your output.

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Let me write 'my_string'.

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You're getting your output.

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Now, I want to print your string characters one by one,

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in different lines actually I want to print. I mean suppose

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in first line I want to get first character,

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second line second character, something like that.

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[no audio]

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Right. See, what I am doing is simply

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'for each_char',

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I can separate character one by one from your given string

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with the help of your loop, for loop. By default you can use it.

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Yes. You are getting one by one character.

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Now, if you remember instead of these two lines,

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in case if your intention is just to print your character, one by one

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characters, right, no need to use for loop for your strings.

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You have a 'join' method, if you remember.

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[no audio]

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'join', let me write first your string as it is, and see the

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output, what you are getting. You're getting your string by adding

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space, but I am going to add '\n', new line. Now see the

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output. No need to write two lines of output to print your

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characters line by line.

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Right. Just you can use 'join' method.

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Right. Fine. Then, let me comment this.

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[no audio]

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There is not much work with your strings. In case if you want

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to simply print your characters one by one on your output

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side you can take either print, I mean for loop or 'join' directly.

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That's okay. Now what I am doing is, let me take my list.

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I am writing '1,2,3,4,5' something like that.

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Now, you know how to take your 'each' value from your list

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one by one,

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[no audio]

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and you can print it. Right. Yes, observe your output.

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I'm able to print your values one by one.

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That's fine.

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But assume that inside of a list I have a

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'values as', okay

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let me keep this as it is.

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[no audio]

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I want to comment this.

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That's fine.

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[no audio]

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Now actually, now 'my_list' is in this way guys. 'my_list ='

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list of list. but each and every value is again a tuple.

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Yes, you may have in this way. No problem.

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[no audio]

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Something like this. Now for this I'm using, now,

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this is not like one value,

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it is like some items, right,

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I mean for each tuple inside of a list.

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I am taking simply, you can take any variable.

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I am taking simply 'each_item in my_list'.

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Now, I am printing 'each_item'. Now, see the output.

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Yeah. Let me save it and see the output.

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[no audio]

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From your list this entire thing is actually one first value.

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That's what I am taking. 'each_item' is nothing but first value

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you're taking. Then you are printing second value.

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See, finally this entire thing is a first value in your list like

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one, this entire value is second value,

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third value. Now you're taking one by one and your printing them.

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Yes, we are doing that.

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Now one more thing. Let me open my command line.

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It's very important, try to understand.

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See guys, I have a tuple called

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[no audio]

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Some number maybe, in this way,

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and I'm going to assign this like 'x,y=(5,6)'.

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'print(y)', and see the result what you have. You're going

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to get 6, and in 'x' you are going to get 5.

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[no audio]

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Now what I am doing here is, with the help of your for loop

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this entire thing I am storing into 'each_item' variable.

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I am going to store this first value into this 'each_item',

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then I am printing, the second value

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then I am printing, third value

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I am taking and then I am printing with the help of your loop.

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But while taking, here because we have two values

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the inside of this tuple, I can unpack it with two variables.

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I mean see, I am taking something like

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first value and then

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second value, 'f,s'.

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Now what I am doing is, I am going to print only 'f'.

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I'm going to print only 'f', that means from each and every

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item I am taking first value and then I am printing that.

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Actually, I am taking two values, but first value, 1

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I am assigning to 'f', 2 I am assigning so 's'. But I am printing

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only 'f'. That's why what is the output you're going to expect is,

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from first item 1, from here 4, from here 6.

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See the output. Let me run it by saving this code.

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[no audio]

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One second.

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[no audio]

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One second.

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Yeah, let me save it and run it. See the output.

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[no audio]

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1, 4, 6, you are getting. Only first values. Now, I am printing

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's'. Now in each and every item you are going to get second value.

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I want to print both.

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Yes, you can print it,

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no problem. 'f,s'. 1,2. I mean '(1, 2), (4, 5), (6, 7) you are

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getting. One and two.

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I mean while taking value from your list if that value is

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a tuple, or maybe a list also, then you can unpack it into two variables.

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Let me take now instead of tuple,

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I can also take inside of a list a list,

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or maybe combination of your lists and tuples also, no problem.

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But the thing is whenever if you are taking two variables

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inside of your loop,

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the value which you are taking from your list, that value

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should have two values, then only you can unpack it.

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First value to 'f', second value to 's'. That's it.

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But see that, suppose if I have a list.

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[no audio]

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Let me take it.

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'[3, 4]'. It's fine.

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But if I don't have, only if I have one value

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you can't unpack it because 'x,y' equals to, you are assigning

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one value. That's not possible. 'x=y=3', you can assign it. '3' value

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you can't unpack it to two variables.

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That's what I am saying here.

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Whenever you are taking one by one value, if you have

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two values inside of that value, you can unpack in terms

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of two variables. Now see the result.

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I am saving it. I'm running it.

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Yes, you are getting. The same way

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you can write tuple, and inside of a tuple you can take tuple

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also, combination of tuples and list, you can take anything.

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Actually, up to this it's not that much important, but the

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concept is important. Why I am giving this is, you have one

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very, very important situation while working with your real

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time using dictionaries.

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First of all, let me define my dictionary.

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[no audio]

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I am taking suppose 'a', I am writing 1. Then 'b' I am writing some 2

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let me take. Anything

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you can take it, right. Key as 'c' and value is 3.

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Now, I am taking 'for each in my_dic'.

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Now, let me print.

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You can guess, or you can,

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can you expect what is the output

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I am going to get if I run this code?

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[no audio]

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Only keys you are going to get by default.

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[no audio]

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If this is your dictionary,

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if you use your dictionary inside of your loop,

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you're going to get only keys,

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or if you remember one of the dictionary operation is like

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'.keys' is also there.That is a list.

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Anyway, if you take only 'my_dic', your dictionary in your

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loop, by default your loop, for loop is going to take only keys,

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otherwise your 'dic.keys' operation.

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It's very, very important guys.

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Let me run it and see the output. You're going to get keys

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only. But I want to get only values. Now,

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you can apply here 'values'.

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Now see the result. You're going to get 1, 2, 3, values.

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Now I want to get key, and then value. If you remember, there

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is an operation called 'items'

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on your dictionary. Now see the result.

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'each' is nothing but now an item which consists of key and

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value. Key and value, because now in each and every variable

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you have a tuple which consists of two values. Now I can take

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here two variables called 'key,value'.

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I mean you can take any variable name, but because this is

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dictionary, from the dictionary you are getting key and then

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value, now I am taking 'key' and 'value'.

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Now if you want to print only keys, you can print it, only 'key'.

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See the output. Or I want to print only 'value'.

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See the output. I want to get both,

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'key,value'. Yes.

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That's it. So taking keys and values from your dictionary using for

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loop is very, very important. Try to execute this logic again

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and again, and see the result with all operations.

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This is very, very important guys, working with your dictionary

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with '.items', and what is the output you are getting?

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See, if I run simply on my command line, you have already dictionary,

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what is the output of '.items'? You're going to get a list which

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consists of tuple as a value, and in the tuple you have one is

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the 'key' and second value is 'value'. Now using for loop

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you can take one by one value from your loop.

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And while taking because you have a tuple which consists

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of two values now I am trying to unpack in this way, 'x,y=5,6',

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you know? So now what I am taking

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is, 'key,value' I am taking because it's very suitable

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word for your dictionary. This is a 'key' and this is a 'value'.

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That's why I'm taking variables as 'key' and 'value'.

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[no audio]

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Right. Okay.

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Okay guys, Thank you for watching this video.

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[no audio]