Question

Describe two situations in which you would use a list; two situations in which you would use a tuple, and two situations in which you would use a dictionary. Also do some research to learn about data structure sets, describe when and how to use sets.

Answer 1

# List :

@ A list is an ordered set of data/element  that can be easily changed .

@ List is a collection of elements  of different data types.

@ A list object contains one or more elements ,it may or may not be  of the same type, which are separated by comma(,) and enclosed in square brackets [].

@ List items are refered by the  index number. we can use  index operator [ ] to access an item in a list.

@ List allows duplicate elements .

@ Lists are like arrays .

Examples :

1> List can have similary types of Elements like NAMES

names=["john", "Bob", "Steve", "Maya"]

2> List can also contain elements of different types like a STUDENT ID .

Item=[1, "John", "Computer", 75, class1]

# Tuple :

@ A tuple is an ordered set of data that cannot be changed . Tuple  allows duplicate elements .

@ Tuples cannot be modified after it is created. which means Tuples are  "immutable" .

@ Tuples are created by a sequence of values separated by ‘comma’

it can be with or without the use of () .

@ Tuples may  contain any number of data/elements and of any datatype .

Examples :

1> Tuples can be used to store collection of fruits

fruits=("apple", "pear", "banana", "cherry")

2>Tuples can also store details of product .

Item=(100, "mango ", "habus", 15.50, good)

# Dictionary :

@ Dictionaries are  group of data/elements with  key and value pairs 'key':'value' .

@ Dictionary  is an unordered collection of data values .

@ It is used to store data values like a map .

@ key-value pair in a Dictionary is always separated by a colon : .

@ Dictionary don't allow duplicate elements.

Examples :

1> Point in the plane

points={"p1":(30,30), "p2":(60,60)}

1> Dictionary can also store countary and capital value pairs

countary={"USA":"New York", "UAE":"Abu-dhabi", "India":"New Delhi"}

# Set :

@ Set is an unordered collection of data type.

@ Set don't allows  duplicate elements/data .

@ A set object may contains one or more items, not necessarily of the same type. which are always separated by comma (,) and enclosed in curly brackets {}.

Examples :

1>Set can be used to store collection of numbers.

Input :

>>> Z1={1, 2, 2, 3, 4, 5}
>>> Z1

output: {1, 2, 3, 4, 5}

1>Set can be used to store ID of an employee.

>>> ID={1, "Bob", 101}