python - Convert list into list of lists

Question

I want to convert list into list of list. Example:

my_list = ['banana', 'mango', 'apple']

I want:

my_list = [['banana'], ['mango'], ['apple']]

I tried:

list(list(my_list))

Answer 1

Use list comprehension

[[i] for i in lst]

It iterates over each item in the list and put that item into a new list.

Example:

>>> lst = ['banana', 'mango', 'apple']
>>> [[i] for i in lst]
[['banana'], ['mango'], ['apple']]

If you apply list func on each item, it would turn each item which is in string format to a list of strings.

>>> [list(i) for i in lst]
[['b', 'a', 'n', 'a', 'n', 'a'], ['m', 'a', 'n', 'g', 'o'], ['a', 'p', 'p', 'l', 'e']]
>>>