python multi-list add element with for loop

Question

i want to add an element to a multi-list,like this

l = [["0"]*5]*5
print(l)
for i in range(len(l)):
    l[i].append("\n")

but why every child-list in multi-list add 5th '\n'

[['0', '0', '0', '0', '0', '\n', '\n', '\n', '\n', '\n'], ['0', '0', '0', '0', '0', '\n', '\n', '\n', '\n', '\n'], ['0', '0', '0', '0', '0', '\n', '\n', '\n', '\n', '\n'], ['0', '0', '0', '0', '0', '\n', '\n', '\n', '\n', '\n'], ['0', '0', '0', '0', '0', '\n', '\n', '\n', '\n', '\n']]

I want only add an element.

could you provide an example of what you want your list to look like? — py_coffee, Jan 03 '22 at 10:44
The list `l` includes 5 references to the same list. So with every access to `l` you are modifying the same list — Tomerikoo, Jan 03 '22 at 10:54

score -2 · Answer 1 · answered Jan 03 '22 at 10:42

-2

Your list length is 5. That's why it is appending the 5th \n.

answered Jan 03 '22 at 10:42

Neel Gajjar

9
2

Yes but the OP is doing `l[i].append("\n")` so supposedly each sub-list should have ***one*** `\n` which is why the OP is asking... – Tomerikoo Jan 03 '22 at 10:53

python multi-list add element with for loop

1 Answers1