Reverse a string in Python

Question

There is no built in reverse function for Python's str object. What is the best way of implementing this method?

If supplying a very concise answer, please elaborate on its efficiency. For example, whether the str object is converted to a different object, etc.

Answer 1

Thats my way:

def reverse_string(string):
    character_list = []
    for char in string:
        character_list.append(char)
    reversed_string = ""
    for char in reversed(character_list):
        reversed_string += char
    return reversed_string

Answer 2

s = 'hello'
ln = len(s)
i = 1
while True:
    rev = s[ln-i]
    print rev,
    i = i + 1
    if i == ln + 1 :
        break

OUTPUT :

o l l e h

Answer 3

def reverse_string(string):
    length = len(string)
    temp = ''
    for i in range(length):
        temp += string[length - i - 1]
    return temp

print(reverse_string('foo')) #prints "oof"

This works by looping through a string and assigning its values in reverse order to another string.

Answer 4

Here is a no fancy one:

def reverse(text):
    r_text = ''
    index = len(text) - 1

    while index >= 0:
        r_text += text[index] #string canbe concatenated
        index -= 1

    return r_text

print reverse("hello, world!")