human
Solve in Python:
Given a string s, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest palindrome you can find by performing this transformation.

Example 1:

Input: "aacecaaa"
Output: "aaacecaaa"

Example 2:

Input: "abcd"
Output: "dcbabcd"
 Can you provide a Python code to find and return the shortest palindrome you can find by performing this transformation?
assistant
#Here is Python code to find and return the shortest palindrome you can find by performing this transformation.

class Solution:
     
     def shortestPalindrome(self, s):
         """
         :type s: str
         :rtype: str
         """
         r = s[::-1]
         for i in range(len(s)):
             if s.startswith(r[i:]):
                 return r[:i] + s
         return r + s