Decode XORed Array

class Solution:
    def decode(self, encoded: List[int], first: int) -> List[int]:
        # Initialise arr with first
        arr = [first] * (len(encoded) + 1)

        # Loop through encoded
        # Use encoded[0] and first to generate arr[1]
        # Use encoded[1] and arr[1] to generate arr[2]
        # ...
        for i in range(len(encoded)):
            # Put next_arr_num in i+1th index in arr
            arr[i+1] = encoded[i] ^ arr[i]

        # Return arr
        return arr