I am using two for loops, on the inside of the second loop I want to create a 2d array that adds a new row once the second loop is finished. Is it possible to do something like this in Python?

Desired[i,j] = thing.thing(j) I’m trying to add to the array to make it bigger with each iteration.

for i in range(height):
        for j in range(width):
            array[i][j] = char

I puted the values in the array like this

but I dont konw how to do like this (I want to know length of "i" and "j")

array[i][j]
len(i) , len(j)

Non-shitty languages:
int[] myArray = new int[5][5]

Python:
myArray = [[0]*5]*5

Next:
myArray[1][0] = 1
print(myArray[0][0])

Non-shitty languages:
0

Python:
1

Hello!

I have 5 sets, each set contains a number of elements of variable length (eg. set 1 has 100 elements, set 2 has 150 and so on)

Is it possible to store these sets in a single structure?

For example, if I want to print the 35th elements of the 3rd set, I could call it simply by saying something like MyContainer[setN][elementN]

I was trying to use a 2D array but I can't initialize its shape, since each set has a variable number of elements.

Can anybody point me to the right direction / best practice?

Thank you