What is the simplest way to reverse a list in python without using any inbuilt function ?

Question

We can use slicing technique to reverse a list in single step.
e.g.
list=[1,2,3,4,5,6,7,8,9]
print(list[::-1])

It will print [9,8,7,6,5,4,3,2,1].

Answer 1

python has three ways to reverse a list

list[::-1]
reversed(list)
list.reverse()

pick one of them