Unit 11 : Data Collection

Question 1

What does rstrip() does?

Answer 1

1. Remove the white space at right side

Question 2

What does find() does?

Answer 2

1. Find the string inside a file

Question 3

What allows duplicate data, ordered and changeable?

Answer 3

1. List

mylist = [1,2,3]

• Arrary , the order [0]

Question 4

What allows duplicate data, ordered and unchangeable?

Answer 4

1. Tuple

mytuple = ( “Adam”,”bob”)

Question 5

What doesn’t allow duplicate data, unordered, unchangeable and unindexed?

Answer 5

1. Set

myset = { “Dan” , “Chris”}

Question 6

What doesn’t allow duplicate data, ordered and changeable?

Answer 6

1. Dictionary

mydict = {
“name” : “Adam” ,
“password” : “123” ,
“role” : “chef”
}

print(mydict[“password”])

Question 7

What is list used for?

Answer 7

1. Group similar items

• Ordered, changeable and allow duplicate values

Question 8

What is list defined by?

Answer 8

1. Square brackets [ ]

Question 9

How can we create list ? ( 4 )

Answer 9

1. new_list = []
2. new_list = [ 3, 4, 5, 6 ]
3. new_list = list(range(10))
4. new_list = list(range(2,7))

Question 10

How can we add element? ( 2 )

Answer 10

1. new_list[3] = 145
2. new_list.append(3)

Question 11

Can list insert different types of data ? ( newlist = [ 1 , “Adam” ] )

Answer 11

1. Yes

Question 12

How to add another list ? ( 2 )

Answer 12

1. new_list[2] = new_list2
2. newlist,append(new_list[2])

Question 13

How to print out the list?

Answer 13

1. print(new_list)

Question 14

How to print the exact list?

Answer 14

1. print(new_list[2])

Question 15

How to print the list range?

Answer 15

1. print(new_list[0:3])

• This will take the value in list between 0 , 1 , 2

Question 16

How to scan through the lists?

Answer 16

new_list = [ 3, 4, 5, 6 ]
for i in new_list:
print(i)

• This can print the values inside the list without []

Question 17

How to search for an element?

Answer 17

new_list = [ 3 , 4 , 5 , 6 ]
for i in new_list:
if ( i == 4 ):
print(f”{ i } found in list”)

new_list = [“John” , “Cat”]
name = str(input(“Enter a name to search for : “))
for i in new_list:
if ( i == name ):
print(f”{ i } found in list”)

Question 18

What does append do?

Answer 18

1. Add an element at the end

Question 19

What does insert(0,200) do?

Answer 19

1. Insert at position 0 the element 200

Question 20

What does len(list_name) do?

Answer 20

1. Return the length

Question 21

What does min(list_name) do?

Answer 21

1. Return the min as long as the list is well defined

Question 22

What does max(list_name) do?

Answer 22

1. Return the max as long as the list is well defined

Question 23

What does sum(list_name) do?

Answer 23

1. Returns the sum of elements as long as they’re numbers

Question 24

What does remove(20) do?

Answer 24

1. Remove element 20 from the list

Question 25

What does pop(2) do?

Answer 25

1. Removes element at index 2

Question 26

What values does dictionary wants?

Answer 26

1. Collection of data
   
   • store values in key:value pairs key : value ( “name” : “Adam” )

Question 27

Can we store dictionary in what file?

Answer 27

1. json file

Question 28

How can we read and write file?

Answer 28

1. dump() - write
2. load() - read

Question 29

Write a program to
1. Create a empty dictionary
2. Add item into dictionary
3. Accessing items inside dictionary

Answer 29

newstudent = {}

newstudent[“TP”] = “TP123456”
newstudent[“Name”] = “John”

print(newstudent.get(“Name”)

Question 30

What does clear() and copy() do in dictionary?

Answer 30

1. clear() - Removes all elements from the dictionary
2. copy() - Returns a copy of the dictionary