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Hello, dear friends.



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So in this lesson, we are going to go over some data type operators and the methods in Python.



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So why don't we just go ahead and get started?



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So first up, we're going to need to define some variables.



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I hope you remember what they look like for string.



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String underscore one equals one, two, three, four, five, six, seven.



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Remember the quotes?



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For list list underscore one equals one, two, three, four, five, six, seven, and the brackets.



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For tuples, Tibbles one equals parentheses, one, two, three, four, five, six, seven.



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And remember to close up parentheses.



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Prediction Chenery take to underscore one equals.



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One coal and one.



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To Coleman to.



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Three Colin three, four, Colin, four.



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Five, Colin, five.



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Six, Colin, six.



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Seven on seven.



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Remember, the curly braces and Forsett said underscore one equals curly brace, one, two, three,



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four, five, six, seven.



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And close it up with the curly brace.



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Cool.



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So now our variables are ready.



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So our first task is finding an index.



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So indexing means we're referring to an element of an iterable by its position within the iterable.



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OK, so for this, we're going to use square brackets.



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Please look carefully and type string.



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Underscore one bracket to close bracket.



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List underscore one bracket three.



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Close bracket.



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Troubles underscore one bracket and close that square bracket.



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And the results are, as you see here now, there is something that we're going to need to look out



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for, the python language will always start indexing from zero.



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So it means that when we need to find a second element in our variable, we're going to write one.



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I mean, that's just something that you're either already used to or you're going to need to get used



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to.



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Also, with the help of the minus symbol, we can find the index from the end to the head.



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String one minus two in brackets.



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List one minus three.



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Tuples minus one.



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Get it.



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So here when we type the minus one, we can find the last element in our variable.



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Now, of course, we can also select a particular piece of string, one to Colin five.



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List one, Colan three.



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Tuples one minus two, Kollin, four.



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And please note, those are all in the square brackets.



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And you see the results.



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So here our first number refers to the star.



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The second number refers to the end.



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Now, when we want to start from zero, well, we don't need to type it like this.



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This is called slicing.



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So insets and dictionaries were not going to be able to do indexing or slicing because the order of



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the elements in a set is going to be undefined.



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So in dictionaries, the index value is replaced by a key value.



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All right.



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So let's move on now with the help of the Lende method.



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We can find our data types length.



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Why don't we give it a try?



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Len?



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Parenthesis, string, underscore one close princess.



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Len list one, Len Tuples one.



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Len DECT one.



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And Len, set one, and you're looking at the results.



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Now, what if we want to add an element into our variables?



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Yeah, it's possible.



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So let's have a look.



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String one plus equals eight.



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List underscore one that append parentheses hit close princes.



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Set one dot, add eight.



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Dick underscore one eight.



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Please note the quotes equals eight.



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So let's check them.



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And the result is what you see here.



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So we can't add an element into our troubles.



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Why?



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Because they are immutable.



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Now, also, we can remove an element from our variables.



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Let me show you that list, one dot pop.



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DECT one dot pop.



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Eight.



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And let's check them.



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And the results are what you see right here.



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Now, the pop method will remove one element every time.



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So if we don't define a value, it will remove the last element by default in doubles.



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Now, of course, we can't remove an element because right there are immutable.



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Now, let me show you something else with the help of the count method.



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We can learn how many times each element occurs in our variables.



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Let's give that a shot.



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First, we needed to find new variables.



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String two equals.



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El Lewine, Don.



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List two equals l o n d o n.



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Tuples two equals l o n d o n.



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Get those quotes in there.



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Now, we didn't define a new dictionary and set because dictionaries key value is unique, so they can't



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actually have a repeated element and also sets can't have a repeated element.



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But you already knew that.



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Right.



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OK, so let's continue.



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String to account.



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NN.



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List to account nr.



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Tuples to account NP.



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And here are the results.



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Now, with the help of the update method, we can combine two different dictionaries and sets.



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So let me show you what that looks like.



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I'll try.



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So first, let's define a new set and a dictionary set.



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Two equals curly braces, you remember and write 10, 11 and 12.



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Dict two equals curly braces, quote, nine, unquote, colon nine.



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10, callon 10.



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11 Colan 11.



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All right.



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Now, type set one dot update.



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Set to.



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DECT one done update.



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DECT two.



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And let's check the results.



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And what do you think of that?



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Good job, well done.



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Very good work.



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We learned some very useful methods and operations with our data types in this lesson.



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I've got some great stuff in store coming up, though, so I want to see in the next lesson.



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Until then, have a nice day.