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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def hash_answer(self, answer, timestamp):
 """Cryptographically hash the answer with the provided timestamp This method allows the widget to securely generate time-sensitive signatures that will both prevent tampering with the answer as well as provide some protection against replay attacks by limiting how long a given signature is valid for. Using this same method, the field can validate the submitted answer against the signature also provided in the form. """

        # Ensure our values are string before we start hashing
        timestamp = str(timestamp)
        answer = str(answer)
        hashed = ''

        # Hashing multiple times increases the security of the signature
        for _ in range(ITERATIONS):
            # We use Django's own "salted HMAC" for cryptographic signatures
            hashed = salted_hmac(timestamp, answer).hexdigest()

        return hashed