Difference between revisions of "Python/C3/Sets/English-timed"

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| Hello friends and welcome to the tutorial on 'Sets'.

| Hello friends and welcome to the tutorial on 'Sets'.

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| At the end of this tutorial, you will be able to,

| At the end of this tutorial, you will be able to,

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| Before beginning this tutorial,we would suggest you to complete the tutorial on "Getting started with List"

| Before beginning this tutorial,we would suggest you to complete the tutorial on "Getting started with List"

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|Now, type ipython in the command.

|Now, type ipython in the command.

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| So, What are sets?

| So, What are sets?

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| Sets are data structures which contain unique elements.  

| Sets are data structures which contain unique elements.  

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|In other words, duplicates are not allowed in sets.

|In other words, duplicates are not allowed in sets.

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| Lets look at how to input sets.  

| Lets look at how to input sets.  

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|So type a underscore list is equal to within brackets 1,2,1,4,5,6,2.

|So type a underscore list is equal to within brackets 1,2,1,4,5,6,2.

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|Then a is equal to set in brackets 'a' underscore list.

|Then a is equal to set in brackets 'a' underscore list.

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|Then type 'a'.

|Then type 'a'.

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| We can see that duplicates are removed and the set contains only unique elements.

| We can see that duplicates are removed and the set contains only unique elements.

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| Now let us perform some operations on sets.

| Now let us perform some operations on sets.

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| For this, we shall first create a pair of sets

| For this, we shall first create a pair of sets

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| f10 is equal to set in  brackets and square brackets 1,2,3,5,8

| f10 is equal to set in  brackets and square brackets 1,2,3,5,8

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| p10 is equal to set of within brackets and square brackets 2,3,5,7.

| p10 is equal to set of within brackets and square brackets 2,3,5,7.

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|f10 is the set of fibonacci series numbers from 1 to 10.

|f10 is the set of fibonacci series numbers from 1 to 10.

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|p10 is the set of prime numbers from 1 to 10.

|p10 is the set of prime numbers from 1 to 10.

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|Various operations can be performed on sets.

|Various operations can be performed on sets.

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| For example, The vertical bar and in bracket  pipe character stands for union.

| For example, The vertical bar and in bracket  pipe character stands for union.

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|So type f10 then a vertical bar then  p10 and hit Enter.

|So type f10 then a vertical bar then  p10 and hit Enter.

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| It gave the union of f10 and p10.

| It gave the union of f10 and p10.

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|The ampersand character stands for intersection.

|The ampersand character stands for intersection.

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|So type f10 ampersand p10.

|So type f10 ampersand p10.

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| It gave the intersection of f10 and p10 similarly.

| It gave the intersection of f10 and p10 similarly.

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|f10 - p10 gives all the elements that are in f10 but not in p10 .

|f10 - p10 gives all the elements that are in f10 but not in p10 .

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|So type f10 hyphen p10  

|So type f10 hyphen p10  

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|and f10 charat p10 gives all the elements in f10 union p10 but not in f10 intersection p10. So type f10 charat p10.

|and f10 charat p10 gives all the elements in f10 union p10 but not in f10 intersection p10. So type f10 charat p10.

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| In mathematical terms, it gives the symmetric difference.

| In mathematical terms, it gives the symmetric difference.

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|Sets also support checking of subsets.

|Sets also support checking of subsets.

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|So lets type b is equal to in brackets and square brackets 1,2.

|So lets type b is equal to in brackets and square brackets 1,2.

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|Then b is less than f10.

|Then b is less than f10.

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| It gives a True since b is a proper subset of f10.  

| It gives a True since b is a proper subset of f10.  

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|Similarly, type f10 less than f10.

|Similarly, type f10 less than f10.

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| It gives a  False since f10 is not a proper subset.  

| It gives a  False since f10 is not a proper subset.  

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|Hence the right way to do would be f10 less than or equal to f10.

|Hence the right way to do would be f10 less than or equal to f10.

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| we get a True  since every set is a subset of itself.

| we get a True  since every set is a subset of itself.

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|Sets can be iterated upon just like lists and tuples.

|Sets can be iterated upon just like lists and tuples.

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|for i in f10 colon in the command and then type print i comma

|for i in f10 colon in the command and then type print i comma

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| It prints the elements of f10.

| It prints the elements of f10.

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|The length and container ship check on sets is similar as in lists and tuples.

|The length and container ship check on sets is similar as in lists and tuples.

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|So type len within brackets f10 and hit Enter.

|So type len within brackets f10 and hit Enter.

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|And It shows 5, type 1 in f10.

|And It shows 5, type 1 in f10.

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|Then type 2 in f10.

|Then type 2 in f10.

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| And prints  True  and True  respectively

| And prints  True  and True  respectively

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|Now, pause the video here, try out the following exercise and resume the video.

|Now, pause the video here, try out the following exercise and resume the video.

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| ''' Given a list of marks, marks is equal to within square brackets 20, 23, 22, 23, 20, 21, 23 '''

| ''' Given a list of marks, marks is equal to within square brackets 20, 23, 22, 23, 20, 21, 23 '''

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|list all the duplicates

|list all the duplicates

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| Duplicates marks are the marks left out when we remove each element of the list exactly one time.

| Duplicates marks are the marks left out when we remove each element of the list exactly one time.

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|So type marks is equal to  in square brackets 20,23,22,23,20,21,23.

|So type marks is equal to  in square brackets 20,23,22,23,20,21,23.

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|Then type marks underscore set is equal to set within bracket marks.

|Then type marks underscore set is equal to set within bracket marks.

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|then for mark in marks underscore set colon, then marks dot remove within brackets mark.

|then for mark in marks underscore set colon, then marks dot remove within brackets mark.

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| We are now left with only duplicates in the list marks +  

| We are now left with only duplicates in the list marks +  

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|Hence Type duplicates is equal to set  marks and hit enter.

|Hence Type duplicates is equal to set  marks and hit enter.

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|Then type duplicate.

|Then type duplicate.

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|Hence, We obtained our required solution

|Hence, We obtained our required solution

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| This brings us to the end of the tutorial.

| This brings us to the end of the tutorial.

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| In this tutorial, we have learnt to,

| In this tutorial, we have learnt to,

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| Make sets from lists.

| Make sets from lists.

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| Perform union, intersection and symmetric difference operations. by using the operators ''|'', ''&'' and ''^'' respectively.

| Perform union, intersection and symmetric difference operations. by using the operators ''|'', ''&'' and ''^'' respectively.

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|Check if a set is a subset of other using the ' '' and ' = '' operators.

|Check if a set is a subset of other using the ' '' and ' = '' operators.

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|Then, Understand various similarities with lists like length and containership.

|Then, Understand various similarities with lists like length and containership.

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| Here are some self assessment questions for you to solve

| Here are some self assessment questions for you to solve

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|1. First one, If a is equal to within square brackets 1, 1, 2, 3, 3, 5, 5, 8  

|1. First one, If a is equal to within square brackets 1, 1, 2, 3, 3, 5, 5, 8  

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| And What is set(a)

| And What is set(a)

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|The options are  

|The options are  

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|  set within brackets and square brackets 1, 1, 2, 3, 3, 5, 5, 8  

|  set within brackets and square brackets 1, 1, 2, 3, 3, 5, 5, 8  

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|Second one  set within brackets 1, 2, 3, 5, 8  

|Second one  set within brackets 1, 2, 3, 5, 8  

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| Then the third option  set([1, 2, 3, 3, 5, 5])  

| Then the third option  set([1, 2, 3, 3, 5, 5])  

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| Then the last option is Error.

| Then the last option is Error.

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|2. Second question,  odd is equal to set within brackets 1, 3, 5, 7, 9  and  squares is equal to set within brackets 1, 4, 9, 16  

|2. Second question,  odd is equal to set within brackets 1, 3, 5, 7, 9  and  squares is equal to set within brackets 1, 4, 9, 16  

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|''' How do you find the symmetric difference of these two sets?

|''' How do you find the symmetric difference of these two sets?

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|3. The third questions is, a  is a set.

|3. The third questions is, a  is a set.

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| how do you check if a variable b  exists in a ?

| how do you check if a variable b  exists in a ?

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| Now And the answers,

| Now And the answers,

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|1. First answer is, set of a will have all the common elements in the list  a , that is  set within brackets 1, 2, 3, 5, 8  

|1. First answer is, set of a will have all the common elements in the list  a , that is  set within brackets 1, 2, 3, 5, 8  

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|2. The Second answer is , To find the symmetric difference between two sets, we use the operator charat.

|2. The Second answer is , To find the symmetric difference between two sets, we use the operator charat.

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| So type odd charat squares

| So type odd charat squares

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|3. Final answer is, To check the container ship, we say,

|3. Final answer is, To check the container ship, we say,

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|b in a

|b in a

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| So Hope you have enjoyed this tutorial and found it useful.  

| So Hope you have enjoyed this tutorial and found it useful.  

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|Thank you!

|Thank you!

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