Introduction to Python

Question 1

Ask user data as “variable”

Answer 1

variable = input()

Question 2

Convert to string

Answer 2

Str()

Question 3

Convert to integer

Answer 3

int()

Question 4

Convert to float

Answer 4

float()

Question 5

How to combine “result is” and result in print

Answer 5

print(f”result is {result}”

Question 6

How to calculate x square

Answer 6

x**2

Question 7

How to print without line end

Answer 7

print(“”, end=” “)

Question 8

Shorter for:
sum = sum + x

Answer 8

sum += x

Question 9

Operator equal

Answer 9

==

Question 10

Operator not equal

Answer 10

!=

Question 11

Data type True/False

Answer 11

bool

Question 12

How to calculate square root of x

Answer 12

sqrt(x)

Question 13

How to end an if line

Answer 13

:

Question 14

Check if “number” is odd

Answer 14

if number %2 == 0:

Question 15

Three possibilities If expression

Answer 15

if
elif
else

Question 16

X ist nicht kleiner als 1

Answer 16

if not x < 1

Question 17

Nested if condition

Answer 17

if:
If:

Question 18

How to create a loop

Answer 18

while:

Question 19

How to check length of a string?

Answer 19

len()

Question 20

Adress first letter of “word”

Answer 20

word[0]

Question 21

last character of “word”

Answer 21

word[len(word)-1]

Question 22

search for X in “word”

Answer 22

“X” in word

Question 23

locate a substring in string

Answer 23

string.find(substring)

Question 24

jump to start of loop

Answer 24

continue

Question 25

How to specify type of argument in a function. (int)

Answer 25

argument : int

Question 26

Initiate list with values 0, 1

Answer 26

list = [0,1]

Question 27

add to list

Answer 27

list.append()

Question 28

Put a into position b in list

Answer 28

list.insert(b, a)

Question 29

delete from list by index a

Answer 29

list.pop(a)

Question 30

remove value a from list

Answer 30

list.remove(a)

Question 31

redefine list from smallest to greatest

Answer 31

list.sort

Question 32

new sorted list2 from list1

Answer 32

list2 =sorted(list1)

Question 33

repeat for loop 3 times

Answer 33

for i in range(4)

Question 34

print X decimals of argument number in f Print statement

Answer 34

{number.Xf}

Question 35

print variable with X white spaces reserved

Answer 35

{variable: X}

Question 36

slice a string

Answer 36

string[start:stop:step]

Question 37

count the number of 1 in list

Answer 37

list.count(1)

Question 38

replace a with b in string

Answer 38

string.replace("a", "b")

Question 39

create a true copy of matrix

Answer 39

import copy copy_matrix = copy.deepcopy(matrix)

Question 40

create an empty dictionary

Answer 40

dictionary= {}

Question 41

delete key-value pair from dictionary

Answer 41

del dictionary["key"]

Question 42

delete whole dictionary

Answer 42

dictionary.clear()

Question 43

initiate a tuple

Answer 43

tuple = ()

Question 44

How are tuples different from list

Answer 44

they are immutable

Question 45

return tuple for each key-value pair in dictionary

Answer 45

dictionary.items()

Question 46

traverse a dictionery

Answer 46

for X, Y in dictionary.items():

Question 47

remove whitespace from start or end of string

Answer 47

string strip()

Question 48

specify writing mode for file

Answer 48

with open("file", "w") as my_file:

Question 49

specify append mode for file writing

Answer 49

with open("file", "a") as my_file

Question 50

clear contacts of file

Answer 50

with open("file", "w") as my_file: pass OR open("file", "w"). close

Question 51

What is a ValueError

Answer 51

The argument passed to function is invalid.

Question 52

What is a Type error?

Answer 52

Value is the wrong type(int instead of str for len())

Question 53

What is an Index error?

Answer 53

Referring to an index that doesn't exist.

Question 54

random integer between a,b

Answer 54

from random import randint randint(a, b)

Question 55

shuffle any data passed

Answer 55

from random import shuffle shuffle(data)

Question 56

return a randomly picked item from data_structure

Answer 56

from random import choice choice(data_structure)

Question 57

Draw random sample size n from data_structure

Answer 57

from random import sample sample(data_structure, n)

Question 58

what is a method

Answer 58

object.method()