1. Data Structure (and method) and Basic operation

Question 1

8 basic datatypes

Answer 1

int, float, bool, str

list, tuple, set, dict

Question 2

list

Answer 2

[a,b,c]

ordered sequence of objects

Question 3

tuple

Answer 3

(a,b,c)

ordered immutable sequence of objects

Question 4

set

Answer 4

{a,b,c}
unordered unique objects

set cannot be retrieved by index
either cast it to a list or tuple unpacking

Question 5

dictionary

Answer 5

{“k1”: a , “k2” : b}
unordered key:value pairs
key can be number

Question 6

index: power of 2

Answer 6

2**2

Question 7

Remainder: 7 mod 4

Answer 7

7%4

Question 8

not equal

Answer 8

!=

and == means equal

Question 9

integer division / floor division

Answer 9

//
11.9 // 3 = 3

Question 10

line continuation

Answer 10

‘this is a \

line continuation’

Question 11

block comment

Answer 11

’’’
abc
‘’’
may only work in Jupyer

line comment
#abc

Question 12

user input

Answer 12

myvar = input()

always returns string

Question 13

create variable dynamically

Answer 13

for i in range(9):

exec(f”g{i} = Grid({i})”)

Question 14

In place function

Answer 14

Act direct and does not return anything

List.sort() -> original list is sorted

Question 15

cast to different data types

Answer 15

int(string)
list(string)
str(int)
str(list) -> this is stupid
set(list)

Question 16

check type

Answer 16

type

Question 17

check reference

Answer 17

id()

Question 18

import module

Answer 18

import datetime

import pandas as pd

Question 19

import method from module

Answer 19

from datetime import datetime and timedelta

from random import shuffle