Nirmala Venkat at 06:00, 19 September 2018

2018-09-19T06:00:00Z

Priyacst: Created page with " {| style="border-spacing:0;" | style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"|
2018-09-17T09:53:28Z

Created page with " {| style="border-spacing:0;" | style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| <ce..."

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{| style="border-spacing:0;"
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| <center>'''Visual Cue'''</center>
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| <center>'''Narration'''</center>

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide title
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Welcome to the spoken tutorial on '''Sets in Python'''.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

Objectives

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| In this tutorial, you will learn to,

* Create '''sets''' from '''lists'''
* Perform '''union''', '''intersection''' and '''symmetric''' '''difference''' '''operations'''
* Check if a '''set''' is a '''subset''' of other and
* Understand various similarities with '''lists'''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

System Specifications
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| To record this tutorial, I am using

* '''Ubuntu Linux 16.04''' operating system
* '''Python 3.4.3 '''and
* '''IPython 5.1.0'''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

Pre-requisites
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| To practise this tutorial, you should know how to

* run basic '''Python '''commands on the '''ipython console '''and
* use '''lists'''

If not, see the relevant '''Python '''tutorials on this website.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Slide: Sets
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| First let us see the overview of '''sets'''.

'''Sets''' are unordered collections of unique '''elements'''.

The set itself is mutable.

We can add or remove items from it.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.095cm;padding-right:0.191cm;"| Open the terminal
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.095cm;padding-right:0.191cm;"| Let us start '''ipython'''.

Open the '''terminal.'''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.095cm;padding-right:0.191cm;"| Type '''ipython3 '''and''' '''press''' Enter'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.095cm;padding-right:0.191cm;"| Type '''ipython3 '''and press '''Enter.'''

From here onwards, remember to press the '''Enter''' key after typing every command on the '''terminal'''.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''<nowiki>a_list = [1, 2, 1, 4, 5, 6, 2] </nowiki>'''

'''a = set(a_list)'''

'''a'''

Highlight the output
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Let us look at how to input '''sets'''.

Type,

'''a''''' underscore '''''list '''''is equal to inside square brackets '''''1 '''''comma''''' 2 '''''comma''''' 1 '''''comma''''' 4 '''''comma''''' 5 '''''comma''''' 6 '''''comma''''' 2'''

Type, '''a '''''is equal to '''''set '''''inside brackets '''''a '''''underscore '''''list'''

Then type,''' a'''

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

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''b = {1, 2, 1, 4, 5, 6, 2}'''

'''b'''

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Sets can also be created directly as follows:

Type,

'''b '''''is equal to inside curly braces '''''1 '''''comma''''' 2 '''''comma''''' 1 '''''comma''''' 4 '''''comma''''' 5 '''''comma''''' 6 '''''comma''''' 2'''

Type, '''b'''

As before, we see that the set contains only unique elements.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type, '''c = set()'''

Show text '''d = {}'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| To create an''' empty set, '''type,

'''c '''''is equal to '''''set '''''open and close brackets''

Note that '''d '''''is equal to open and close curly braces''''' '''creates an empty dictionary, not an empty set.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''<nowiki>b_list = [[1], 2, 1, 6, 2] </nowiki>'''

'''b = set(b_list)'''

Highlight '''TypeError'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| '''Sets''' can contain '''numbers''', '''strings''', and '''tuples.'''

But cannot contain mutable elements such as '''lists''' or '''dictionaries'''.

Type,

'''b '''''underscore '''''list '''''is equal to inside square brackets again inside square brackets '''''1 '''''comma''''' 2 '''''comma''''' 1''' ''comma''''' 6 '''''comma''''' 2 '''

Now type, '''b '''''is equal to''''' set '''''inside brackets '''''b '''''underscore '''''list'''

As you can see, it gives a '''TypeError.'''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''<nowiki>f = set([1, 2, 3, 5, 8]) </nowiki>'''

'''<nowiki>p = set([2, 3, 5, 7,11,13])</nowiki>'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Now let us perform some '''operations''' on '''sets'''.

For this, we will first create a pair of '''sets.'''

Type the sets as shown.

Here, '''f '''is the '''set''' of '''fibonacci''' numbers from 1 to 10.

'''p''' is the '''set''' of '''prime''' numbers from 1 to 15.''' '''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''f.add(13)'''

'''f'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Various '''operations''' can be performed on '''sets'''.

First we will add an element to a set by using '''add''' method.

Type,

'''f '''''dot '''''add''''' inside brackets '''''13'''

Now type, '''f'''

As you can see, '''13 '''is added to the set '''f.'''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''f.add(13)'''

'''f'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| '''add''' method has no effect if the element is already present.

Type,

'''f '''''dot''''' add '''''inside brackets''''' 13'''

Type, '''f'''

As you can see, '''13 '''is not added this time.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''p.remove(13)'''

'''p'''

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Next we will learn to remove an element using '''remove '''method.

Type,

'''p '''''dot '''''remove '''''inside brackets '''''13'''

Now type, '''p'''

As you can see, '''13 '''is removed from the set '''p'''.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''p.remove(18)'''

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| If the element is not a member, it raises a '''KeyError.'''

Type,

'''p '''''dot '''''remove '''''inside brackets '''''18'''

'''KeyError '''is raised since element '''18 '''is not present in '''p.'''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''f | p'''

'''f.union(p)'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| The''' pipe''' character stands for '''union.'''

Type,

'''f '''''pipe''''' p '''

Or type, '''f '''''dot '''''union '''''inside brackets '''''p'''

It gave the '''union''' of '''f '''and''' p '''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''f & p '''

'''f.intersection(p) '''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| The '''ampersand''''' ''character stands for '''intersection'''.

Type,

'''f '''''ampersand''''' p'''

Or type, '''f '''''dot '''''intersection '''''inside brackets '''''p '''

It gave the '''intersection''' of '''f''' and '''p.'''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''f - p'''

'''f.difference(p)'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''f '''''minus''''' p'''

Or type, '''f '''''dot '''''difference '''''inside brackets '''''p'''

It gave all the '''elements''' that are in '''f''' but not in '''p'''.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''f ^ p'''

'''f.symmetric_difference(p)'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''f '''''caret''''' p'''

Or type, '''f '''''dot '''''symmetric '''''underscore '''''difference '''''inside brackets '''''p'''

It''' '''gives all the '''elements''' in '''f''' '''union''' '''p''' but not in '''f''' '''intersection''' '''p'''.

In mathematical terms, it gives the '''symmetric difference'''.

<nowiki><<PAUSE>></nowiki>

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''<nowiki>a = set([1, 2, 3, 4])</nowiki>'''

'''<nowiki>b = set([1, 2]) </nowiki>'''

'''<nowiki>b <= </nowiki>a'''

'''b.issubset(a)'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| '''Sets''' also support checking of '''subsets'''.

Type,''' '''

'''a '''''is equal to '''''set''''' inside brackets inside square brackets '''''1 '''''comma '''''2 '''''comma '''''3 '''''comma '''''4'''

Type, '''b '''''is equal to '''''set '''''inside brackets inside square brackets '''''1 '''''comma''''' 2 '''

Now type, '''b''''' less than or equal to '''''a'''

Or type, '''b '''''dot '''''issubset '''''inside brackets '''''a'''

It gives a''' True '''since '''b''' is a '''subset''' of '''a. '''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''b >= a'''

'''b.issuperset(a)'''

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| '''Sets''' also support checking of '''supersets'''.

Type,

'''b '''''greater than or equal to '''''a'''

Or type, '''b '''''dot '''''issuperset '''''inside brackets '''''a'''

We get '''False''' since '''b '''is not a superset of '''a'''.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''<nowiki>a <= a </nowiki>'''

'''a >= a'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Every set is a subset as well as a superset of itself.

Type,

'''a '''''less than or equal to '''''a'''

'''a''''' greater than or equal to '''''a'''

It gives '''True''' in both cases since''' a '''is a''' superset '''and''' subset''' of itself'''. '''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''for x in a:'''

'''print(x)'''

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Elements of a '''set''' can be accessed using '''for''' loop'''.'''

Type,

'''for x in a '''''colon''

'''print '''''inside brackets '''''x'''

The items from the set will not appear in any specific order.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''len(a)'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| The '''length''' and '''containership''' check on '''sets''' are similar as in '''lists''' and '''tuples'''.

Type,

'''len '''''inside brackets '''''a '''

It shows 4'''. '''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''1 in a'''

'''7 in a'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''1 in a 36'''

'''7 in a 37'''

It prints''' True '''and''' False '''respectively''' '''

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| '''Sets''' do not support '''indexing'''.

Hence, '''slicing''' and '''striding''' are not valid on '''sets'''.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"|
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Pause the video.

Try this exercise and then resume the video.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

Exercise 1
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Given a list of marks, as shown.

List all the duplicate marks.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Switch to terminal
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Switch to the terminal for the solution.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''<nowiki>marks = [20, 23, 22, 23, 20, 21, 23] </nowiki>'''

'''marks_set = set(marks)'''

'''for num in marks_set:'''

'''marks.remove(num)'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''marks '''''is equal to inside square brackets '''''20''''' comma''''' 23''''' comma''''' 22''''' comma''''' 23''''' comma''''' 20''''' comma''''' 21''''' comma''''' 23 '''

'''marks '''''underscore '''''set '''''is equal to '''''set '''''inside brackets '''''marks'''

'''for num in marks '''''underscore '''''set''''' colon''

'''marks''''' dot '''''remove '''''inside brackets '''''num'''

'''remove''' method only removes the first occurrence of an item from the list.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''duplicates = set(marks) '''

'''duplicates'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Type,

'''duplicates '''''is equal to '''''set''''' inside bracket '''''marks '''

Now type, '''duplicates'''

We now have duplicate marks in the '''set duplicates.'''

Hence, we have obtained our required solution

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

Summary slide

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| This brings us to the end of this tutorial. Let us summarize.

In this tutorial, we have learnt to,''' '''

* Make '''sets''' from '''lists '''or by using curly braces
* Perform '''union''', '''intersection''' and '''symmetric''' '''difference''' operations
* Check if a set is a subset of other using the ''less than or equal to'' operator
* Understand the various similarities with lists like length and containership

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

Evaluation

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Here are some self assessment questions for you to solve

# If '''a '''is assigned as follows, what is '''set '''''of'' '''a'''
# Given '''odd''' and '''squares''' as shown.How do you find the '''symmetric difference''' of these two sets?
# If '''a''' is a set, how do you check if a variable '''b''' exists in '''a'''?

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

Solutions

| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| And the answers,''' '''

# '''set '''''of '''''a''' will have all the common elements in the list '''a''', that is 1 ''comma'' 2 ''comma'' 3 ''comma'' 5 ''comma'' 8.
# To find the symmetric difference between two sets, we use the operator ''caret''.

So we can type '''odd '''''caret '''''squares'''

# To check the containership, we type, '''b in a'''

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| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

Acknowledgement
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India.

For more details, visit this website.

|-
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| Show Slide

Thank You
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.097cm;padding-right:0.191cm;"| This is Priya from IIT Bombay signing off.

Thanks for watching.

|}

@@ Line 559: / Line 559: @@
 # '''set '''''of '''''a''' will have all the common '''elements''' in the '''list''' '''a''', that is 1 ''comma'' 2 ''comma'' 3 ''comma'' 5 ''comma'' 8.
-# To find the '''symmetric difference''' between two '''sets''', we use the operator ''caret''.
+# To find the '''symmetric difference''' between two '''sets''', we use the operator ''caret''. So we can type '''odd '''''caret '''''squares'''
-−
 So we can type '''odd '''''caret '''''squares'''
-−
 # To check the containership, we type, '''b in a'''

Python-3.4.3/C3/Sets-in-Python/English - Revision history

Nirmala Venkat at 06:00, 19 September 2018

Nancyvarkey at 15:44, 17 September 2018