Python 嵌套列表：如何拆分列表的内部字符串元素？

Question

Assuming I have a list, which contains string elements. How can I split the string element of every cell of every index of the list, without having them all mixed up with each other? I still want every element separated from the one in the other indexes. Is this possible? For example, if I have this input from the user:

user_input = ['hello', 'hey', 'hi']

How can I make it look like this:

split_list = [['h', 'e', 'l', 'l', 'o'], ['h', 'e', 'y'], ['h', 'i']]

Answer 1

You can use the list function on a string to split the string into a list containing each of its characters.

>>> strings = ['some', 'strings', 'here']
>>> list(map(lambda x: list(x), strings))
[['s', 'o', 'm', 'e'], ['s', 't', 'r', 'i', 'n', 'g', 's'], ['h', 'e', 'r', 'e']]

Answer 2

If you want to split by a string like you would with the .split() function, you could loop through the elements in the array.

test_list = ["String 1", "String 2"]

def split_list(input_list, delimiter):
    for i in range(len(input_list)):
        input_list[i] = input_list[i].split(delimiter)

    return input_list

print(split_list(test_list, " "))

Returns: [['String', '1'], ['String', '2']]

Answer 3

In python, so split on every character, the way is using the list constructor, so every element of the given input is treated as a value of the list. Combinate that with a list comprehension and you're done

user_input = ['hello', 'hey', 'hi']
split_list = [list(x) for x in user_input]