如何将字符串转换为列表中的列表？ （Python）

Question

I want to convert pieces of a string into lists and those lists into a matrix. For example: My string is "75 95 64 17 47 82 18 35 87 10 20 04 82 47 65 19 01 23 75 03 34 88 02 77 73 07 63 67 99 65 04 28 06 16 70 92 41 41 26 56 83 40 80 70 33 41 48 72 33 47 32 37 16 94 29 53 71 44 65 25 43 91 52 97 51 14 70 11 33 28 77 73 17 78 39 68 17 57 91 71 52 38 17 14 91 43 58 50 27 29 48 63 66 04 68 89 53 67 30 73 16 69 87 40 31 04 62 98 27 23 09 70 98 73 93 38 53 60 04 23" . I want 75 in a list1. 95, 64 in list2, 17, 47, 82 in list3 etc. Then I want to put those list in one (head) list/matrix. So it would be [[75][95,64][17,47,82]] . When I tried to do this the outcome was: [['75']['95','64']['17','47','82']] .

The code I wrote:

String = "75 95 64 17 47 82 18 35 87 10 20 04 82 47 65 19 01 23 75 03 34 88 02 77 73 07 63 67 99 65 04 28 06 16 70 92 41 41 26 56 83 40 80 70 33 41 48 72 33 47 32 37 16 94 29 53 71 44 65 25 43 91 52 97 51 14 70 11 33 28 77 73 17 78 39 68 17 57 91 71 52 38 17 14 91 43 58 50 27 29 48 63 66 04 68 89 53 67 30 73 16 69 87 40 31 04 62 98 27 23 09 70 98 73 93 38 53 60 04 23"
lst1 = list(String.split(" "))
matrix = []
x = 0
while lst1 != []:
    matrix.append(lst1[:1+x])
    lst1 = lst1[1+x:]
    x += 1
print(matrix)

My question is: What must I change in order to get the outcome that I want (so without ' ' in the matrix)?

Answer 1

You were close. The only thing that you missed, was the conversion of the string values (eg '75' to 75 ).

In order to do this, you could write it like this:

    while lst1 != []:
        converted_list = [ int(item) for item in lst1[:1+x] ]
        matrix.append(converted_list)

This will convert each item from the list into an int, storing it in a new list that you can append to your matrix, while still being able to perform other operations on your list in the same way as you would have done previously.

Answer 2

I just added the code bellow after your code:

for i in range(len(matrix)):
    for j in range(len(matrix[i])):
        matrix[i][j] = int(matrix[i][j])

I'm looking for a more pythonic way to doing this:)