Composted Variables (list(2))

Question 1

How can u put a list inside another?

Answer 1

list1 = list()
list1.append(list2[:]) ~~ you’ll be adding a list (list2) to the list1 and u need to put the index [:] with two dots so it gathers everything inside it.
OR
list1 = [[‘tex1’, 1] , [‘text2’, 2,] , [‘text3’, 3]] ~~ use the key [] to gather all other keys [] witch representes other lists.

Question 2

How to print something inside a group of lists?

Answer 2

~~printing two indexes.
print(list[0][0])
first [0] is the first list.
second [0] is the first word in it.

Question 3

How to print all the elements of a group at once?

Answer 3

~~ for o in list1:

print(o[element u want])

Question 4

What happens if you use len() in a list?

Answer 4

The value returned is equal to the number of elements in the list.

Question 5

What are methods?

Answer 5

Orientation to objects resources, a function to the object.

Always its name after the name of the object (example : a.append()

Question 6

What is the extend function and how to use it?

Answer 6

A function that adds a list to another (limited to it).

name + .extend([element])

Question 7

Can you add two lists inside one?

How?

Answer 7

a = [ [], [] ]

By adding a key and having two more inside of it separated by a coma.

Question 8

How to use lists as queues?

Answer 8

The inclusion is realized at the end, and the exclusion at the beginning.
FIFO - First In First Out

Question 9

What does the command pop do? (on a list)

Answer 9

Exclude from the list and hold/return its value.

Question 10

How to use lists as piles?

Answer 10

Last element to be added is the first element to get out (be removed).
LIFO - Last In First Out

Question 11

What’s the difference between a pile and a queue?

Answer 11

On the queue, the first element to be removed is the first one, on the pile, is the last one (that was added).

Question 12

How to limit numbers to be added to a list?

Answer 12

z = list()
c = int(input(‘Type the numbers: ‘))
if c not in z:
z.append(c)