'Infinite loop over list that adds value to it's own sublist

How can I add a value of a list to its own sublist? Input list:

list = ['apple', 'tesla', 'amazon']

My approach so far:

While True:
 
    list = []

    for comp in list:

            #do some modification

            list.append(comp)

Desired printed output is:

'apple', 'apple','apple', etc.
'tesla', 'tesla','tesla', etc.
'amazon','amazon','amazon', etc.

python arrays

Solution 1:^[1]

If you change your orignal list to a list of lists it can be done as:

list = [['apple'], ['tesla'], ['amazon']]

while True:
    for i in range(len(list)):
        list[i].append(list[i][0])

The output on each iteration would be something like:

# for iteration 1
['apple', 'apple']
['tesla', 'tesla']
['amazon', 'amazon']

# for iteration 2
['apple', 'apple', 'apple']
['tesla', 'tesla', 'tesla']
['amazon', 'amazon', 'amazon']

Solution 2:^[2]

list = ['apple', 'tesla', 'amazon']
for idx, item in enumerate(list):
    text = (list[idx]+",")*len(list)
    print(text[:-1])

apple,apple,apple
tesla,tesla,tesla
amazon,amazon,amazon

Solution 3:^[3]

I can think of a couple of ways - I am using the length of each item in the list to define a condition here as you did not specify the condition you are using to move on to the next item -

Option 1 - using a `for` with a `while` loop

l = ['apple', 'tesla', 'amazon'] 
x = 0
for comp in l:
    while x < len(comp):
        print(comp)
        x += 1
    x = 0

Option 2 - using `while` with a `iter`

l = ['apple', 'tesla', 'amazon'] 
x = 0
it = iter(l)
while True:
    try:   
        item = next(it)
        while x < len(item):
            print(item)
            x += 1
        x = 0
    except StopIteration:
        break

In both cases - the output is

apple
apple
apple
apple
apple
tesla
tesla
tesla
tesla
tesla
amazon
amazon
amazon
amazon
amazon
amazon

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Enric Grau-Luque
Solution 2	uozcan12
Solution 3	Mortz

'Infinite loop over list that adds value to it's own sublist

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Option 1 - using a for with a while loop

Option 2 - using while with a iter