How to clear values in list without affecting the dependant list??pls answer

Question

I've attached the code
(input = 1,2,3,4)
The desired output is:
[[1,2 ],[3,4 ]]
But the output is
[[ ],[ ]]
Pls answer..

https://code.sololearn.com/czYHB4TDI5Mr/?ref=app
https://code.sololearn.com/czYHB4TDI5Mr/?ref=app

Answer 1

little change in line 7
data.append(data2[::])

Answer 2

l=[1,2,3,4]
x=[[l[i],l[i+1] ] for i in range(0,len(l),2)]
print(x)

I hope it helps!!!

Answer 3

Thank you very much for your responses.