How can I reverse a section of a list using a loop in Python?

Question

I\'m in need of a little help reversing a section of a list in Python using a loop.

I have a list: mylist = [\'a\', \'b\', \'c\', \'d\', \'e\', \'

Answer 1

The pythonic solution:

list1[reverse_index::-1] + list1[reverse_index+1:]

Now, that's not using loops like you asked. Well, not explicitly... Instead we can break down the above into its constituent for loops.

def list_section_reverse(list1, reverse_index):
    if reverse_index < 0 or reversed_index >= len(list1):
        raise ValueError("reverse index out of range")
    reversed_part = []
    for i in range(reverse_index, -1, -1): # like for i in [n, n-1, ..., 1, 0]
        reversed_part.append(list1[i]

    normal_part = []
    for i in range(reverse_index + 1, len(list1)):
        normal_part.append(list1[i])

    return reversed_part + normal_part