Python Code

Question 1

How to print Hello to terminal?

Answer 1

print(“Hello”)

Question 2

How to create variable x and then assign value 10 or maybe Hello?

Answer 2

x = 10
x = “Hello”

Question 3

What symbol is called the assignment operator?

Answer 3

1. =

Question 4

What is the difference between :
1. d = 1 + 4
2. d = “Hello” + “ World”

Answer 4

1. 5
2. Hello World

• • in string is called concatenation

Question 5

How to know what type value is it in python?

Answer 5

e = 1
y = “Hello”
z = 42.0

type(e)
<type ‘str’>

type(y)
<type ‘int’>

type(z)
<type ‘float’>

Question 6

How to change string 123 toint?

Answer 6

e = “123”
e_int = int(e)

• Using int() , str() or float()

Question 7

How to input from user?

Answer 7

name = input(“Name : “)
print(name)

Question 8

List out 2 methods for commenting

Answer 8

1. # ( Single-line Comment )
2. ”””””” ( Multi-line Comment )

Question 9

How to print Hi using multiple 5?

Answer 9

print ( “Hi” * 5 )

Question 10

What code do we need to put semicolons ?

Answer 10

1. if, elif , else
2. for, while
3. try, except
4. def ( functions )
5. File Handling ( with open (“g.txt” , “r”) as f : )
6. Class Definitions

Question 11

List out all relational operators

Answer 11

1. < Less than
2. > Greater than
3. == Equal to
4. <= Less than or equal to
5. > = Greater than or equal to
6. != or <> Not equal to

Question 12

List out all logical operators

Answer 12

1. && ( And )
2. || ( Or )
3. ! ( Not )

Question 13

Write a program to display the below conditions
1. Below 18 - Not Ok
2. Above 18 & Below 60 - OK
3. Above 60 - Old

Answer 13

age = int(input(“Age : “))
if ( age < 18 ):
print(“Not Ok”)
elif ( age >= 18 ) and ( age < 60 ):
print(“Ok”)
else:
print(“Old”)

Question 14

How to receive only int input and print out error message when entering wrong values?

Answer 14

try:
age = int(input(“Age : “)
print(“Your age : “ , age )
except ValueError:
print(“Please enter integer values only!”)

Question 15

List out all the loops type ( 2 )

Answer 15

1. While Loops
2. For Loops

Question 16

How to use loop to display integers from 10 to 30?

Answer 16

i = 10
while i <= 30:
print(i)
i += 1
print(“End”)

for i in range(10,31):
print(i)

Question 17

How to loop using Lists?

Answer 17

pokemon = [“Pikachu”,”Zacian”,”Gengar”]
for i in pokemon:
print( i , “had been registered to pokedex”)

• If it was print( pokemon , “had been registered to pokedex”), it will have below input for 3 times

[‘Pikachu’, ‘Zacian’, ‘Gengar’] had been registered to pokedex

Question 18

How to sum inside a loop?

Answer 18

total = 0
for i in [9 , 41, 12, 3, 74, 15]:
print(f”Total = {total} + {i}”)
total = total + i
print(total)

Question 19

How to find the average in the loop?

Answer 19

total = 0
count = 0

for i in [9 , 41, 12, 3, 74, 15]:
total = total + i
count += 1
print(f”Average = {total} / {count}”)
average = total / count
print(f”Average = {average}”)

Question 20

How to filter the loop, given a list [9 , 41, 12, 3, 74, 15] which requires to print values that is greater than 20?

Answer 20

for i in [9 , 41, 12, 3, 74, 15]:
if i > 20:
print(i)

Question 21

How to search using the Boolean Variable? ( Given list [9 , 41, 12, 3, 74, 15] find value 3 )

Answer 21

found = False
for i in [9 , 41, 12, 3, 74, 15]:
if i == 3:
print(“3 is in the list”)
found = True
print(“Found : “ , found )

Question 22

How to find the smallest value? ( Given list [9 , 41, 12, 3, 74, 15] find the smallest value )

Answer 22

small = 0
for i in [9 , 41, 12, 3, 74, 15]:
if small == 0:
small = i
elif i < small:
small = i
print(“Smallest : “, small)
print(“Most Smallest Value : “ , small)

Question 23

Which is Parameter of Arguments?
1. def print_msg(msg_text):
2. print_msg(“Good Morning”)

Answer 23

1. Parameter
2. Arguments

Question 24

What is the difference between Non-Fruitful and Fruitful Function?

Answer 24

1. Fruitful functions will produce a result ( return value ) while Non-Fruitful Function will won’t return a value

Question 25

Try to define a functions to print message from it

Answer 25

def print_msg(msg) print(msg) print_msg("Good Morning")

Question 26

How to read from file?

Answer 26

with open ( "user.txt" , "r" ) as f: for line in f: print(f) f = open( "user.txt", "r" ) for line in f: print(line)

Question 27

How to write into file?

Answer 27

user_name = input("Username : ") f = open ( "user.txt" , "a" ) f.write(f"{name}) f.close() print("Record added") with open ( "user.txt" , "a") as f: f.write(user_name) print("Record Added")

Question 28

How to count how many lines in a file?

Answer 28

count = 0 with open ( "staff.txt" , "r" ) as f: for line in f: count = count + 1 print(count)

Question 29

How to search through a file?

Answer 29

with open ( "staff.txt" , "r" ) as f: for line in f: if line.startswith("Jill") print(line)

Question 30

How to read from a file without blank spaces of lines?

Answer 30

with open ( "staff.txt" , "r" ) as f: for line in f: staff_details = f.strip() print(staff_details)

Question 31

How to skip a record? ( Skip printing Jack )

Answer 31

with open ( "staff.txt" , "r" ) as f: for line in f: line = line.rstrip() if line.startswith("Jack"): continue print(line)

Question 32

How to select Jack records using in?

Answer 32

with open ( "staff.txt" , "r" ) as f: for line in f: line = line.rstrip() if "Jack" in line: print(line)

Question 33

What error will be getting here? zot = "abc" print(zot[5])

Answer 33

Index Error

Question 34

How to know the lenfth of a banana?

Answer 34

fruits = "banana" print(len(fruits)) # 6

Question 35

How to show b a n a n a

Answer 35

fruits = "banana" k = 0 while k < len(fruits): print(fruits[k]) k += 1

Question 36

How to find how many a's is in the banana word?

Answer 36

fruits = "banana" count_a = 0 for letter in fruits: if letter =="a" count_a = count_a + 1 print(count_a) * letter in for letter in fruits is just like for i in fruits

Question 37

How to let python returns True is there is na in banana?

Answer 37

fruits = "banana" print("na" in fruits) # True print("ta" in fruits) # False

Question 38

Create a variable with the value Monty Python on it, then print out the following condition using Slicing Strings: 1. Mont 2. P 3. Python 4. Mo 5. thon 6. Monty Python

Answer 38

s = "Monty Python" 1. print(s[0:4]) 2. print(s[6:7]) 3. print(s[6:]) / print(s[6:20]) 4. print(s[:2]) / print(s[0:2]) 5. print(s:[8:]) / print(s[8:12]) 6. print(s[:])

Question 39

List out indexing method

Answer 39

1. Basic Indexing - [1] Return character at index 1 - [ -1 ] Return the last character 2. Slicing Notation - [ start : end ] - [ : ] Returns the entire sequence - [ 2 : ] Returns from index 2 to end - [ : 2 ] Returns from the beginning to the end index ( not include the end character ) - [ 1 : 3 ] Returns from index 1 to 2 3. Slicing with Step - [ start : end : step ] - [ :: 2 ] Return every second character from start to end - [ 1: : 2 ] Return every second character starting from index 1 - [ :: -1 ] Return the reversed value ( banana to ananab

Question 40

List out the built in String Library Functions ( 3 )

Answer 40

1. count 2. endswith 3. lower ( .lower() )

Question 41

How to search the character "na" from banana and change it to "z"?

Answer 41

fruit = "banana" search = fruit.find("na") print(search) # Returns the index change = fruit.replace("na","z") print(change) # bazz

Question 42

How to output the string from " banana " to below? 1. banana 2. banana 3. banana

Answer 42

fruit = "banana" 1. fruit.lstrip() 2. fruit.rstrip() 3. fruit.strip()

Question 43

How to split strings?

Answer 43

line = "John, john@mail.com" name,email = line.strip.split(",") print(f"Name : {name}" print(f"Email : {email}"

Question 44

How to create a new list using range to generate from 0 to 10 and 2 to 6?

Answer 44

1. new_list = list(range(10)) 2. new_list = list(range(2,7)) * Or we can manually add new_list = [ 2 , 3 , 4 , 5 , 6 ]

Question 45

How to add new data to list with the condition below: 1. Add 3 to the last of the list 2. Add 3 to the first index

Answer 45

new_list = [1 , 2 , 3] 1. new_list.append(3) # [1 , 2 , 3 , 3] 2. new_list[1] = 3 # [1 , 3 , 3]

Question 46

How to scan through the list ? [ 3 , 4, 5, 6 ]

Answer 46

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

Question 47

How to search 4 in the list ? [ 3 , 4, 5, 6 ]

Answer 47

new_list = [ 3 , 4 , 5 , 6 ] for i in new_list: if ( i == 4 ): print( i , "found in the list" )

Question 48

List out the list functions for sum, len, pop , insert and remove

Answer 48

1. sum(new_list) # Returns the sum of integers 2. len(new_list) # Return the length of the list 3. pop(2) # Removes element at index 2 4. insert ( 0, 200 ) Insert at position 0 the element 200 5. remove(20) # removes element 20 from the list

Question 49

How to add items into dictionary?

Answer 49

newStudent = {} newStudent['TP'] = "TP123456" newStudent['Name'] = "John" Output : newStudent = { 'TP' : "TP123456" 'Name' : "John" } * Access Dictionary Items print(newStudent.get("Name"))

Question 50

How to write inside json file?

Answer 50

userDetails[f"user_{un}"] = {'username' : un , 'password' : pw , 'email' ; em } with open( "users.json" , "w" ) as f: json.dump(userDetails, f , indent = 2 )

Question 51

How to read from json file?

Answer 51

with open( "users.json" , "r" ) as f: allUsers = json.load(f) for id, userData in allUsers.items(): print("\n") print(f"Username = {userData['username']}"