Reverse String

Write a function that takes a string as input and returns the string reversed.

Example 1:

Input: "hello"
Output: "olleh"

Example 2:

Input: "A man, a plan, a canal: Panama"
Output: "amanaP :lanac a ,nalp a ,nam A"

My solutions:

class Solution:
    def reverseString(self, s):
        """
        :type s: str
        :rtype: str
        """
        size = len(s)
        result = ""
        for i in range(size):
            result += s[size - i - 1]

        return result