HOW TO SPLIT 1D STRING LIST INTO 2D LIST?-CodePudding

I can slice lists like [a,b,c,d] into [[a,b],[c,d]], but I'm having trouble slicing more complex ones.

I want to slice the following list ['Jane B 82\n', 'Violet C 76\n', 'Max A 93\n']

into [[Jane, B, 82], [Violet, C, 76], [Max, A, 93]]. How do I slice a list of strings?...(if that's the correct way to put it...)

CodePudding user response：

You're not really slicing here. You are trying to transform each list element into something else. You could use map to do that. For instance:

arr = ['Jane B 82\n', 'Violet C 76\n', 'Max A 93\n']
new_list = list(map(lambda x: x.strip().split(' '), arr))
print(new_list)

output

[['Jane', 'B', '82'], ['Violet', 'C', '76'], ['Max', 'A', '93']]

CodePudding user response：

You really just need simple list concatenation

list =  ['Jane B 82\n', 'Violet C 76\n', 'Max A 93\n']

result = [[x.strip('\n')] for x in list]

print(result)

[['Jane B 82'], ['Violet C 76'], ['Max A 93']]

The x.strip('\n') portion is just removing the newline character. Then you here you are saying "for each item x in list remove the newline character and put it in its own list, then add that character the the list result

CodePudding user response：

Using list comprehension:

a = ['Jane B 82\n', 'Violet C 76\n', 'Max A 93\n']
b = [i.strip("\n").split(" ") for i in a]
print(b)

Output:

[['Jane', 'B', '82'], ['Violet', 'C', '76'], ['Max', 'A', '93']]