I have a dataset in a text file and I read it then split its lines and have created a list of lists like
[['1 2 3'], ['4 5 6'], ... , ['7 8 9']]
How can I convert this list to an integer list like this?
[[1,2,3],[4,5,6],...,[7,8,9]]
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3Does this answer your question? How to split a string of space separated numbers into integers?Lescurel– Lescurel2020-10-28 12:53:00 +00:00Commented Oct 28, 2020 at 12:53
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@meee Let me know, what do you think of my answer. Since I am deleting not useful answers of mineSivaram Rasathurai– Sivaram Rasathurai2020-11-01 02:49:57 +00:00Commented Nov 1, 2020 at 2:49
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4 Answers
This should help you:
lst = [['1 2 3'], ['4 5 6'],['7 8 9']]
lst = [elem.split(' ') for lstt in lst for elem in lstt]
lst = [[int(num) for num in lstt[:]] for lstt in lst]
Output:
>>> lst
[[1, 2, 3], [4, 5, 6], [7, 8, 9]]
4 Comments
CJR
[list(map(int, elem.split(' '))) for lstt in lst for elem in lstt] This is what map is for.
Sushil
YW! Glad to have helped u!
CJR
@Sushil It produces
[[1, 2, 3], [4, 5, 6], [7, 8, 9]] and you got something different because you were not running it on the original list but an already-processed list. The reason to use one-liners is to avoid multiple intermediate assignments that can lead to mistakes like that.Sushil
I was in a hurry, so I forgot to remove the
.split() line XD. But yeah. That is another way of achieving the same output.raw = [['1 2 3'], ['4 5 6'], ['7 8 9']]
data = [[int(i) for i in x[0].split(' ')] for x in raw]
Comments
- Each element inside the big list, we need to make it String and replace the ' by the empty string then split with space so you can get the list of elements with string type but you need to convert it to integer.
list1 = [['1 2 3'], ['4 5 6']]
for i in range(len(list1)):
list1[i] = [int(e) for e in " ".join(list1[i]).replace("\'","").split()]
print(list1)
answered Oct 28, 2020 at 12:56
Sivaram Rasathurai
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Comments
I have written a basic code that converts a list of list containing string elements to int element , i hope the below code solves your problem
lst = [['1 2 3'], ['4 5 6'],['7 8 9']]
lst2 = [elem.split(' ') for lst_ele in lst for elem in lst_ele]
final_list = []
for lists in lst2:
test_list = list(map(int, lists))
final_list.append(test_list)
print(final_list)
