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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_to_exponent(self, h):
 """ Converts a 32 byte hash to an exponent """

        ctr = Crypto.Util.Counter.new(128, initial_value=0)
        cipher = Crypto.Cipher.AES.new(h,
                                       Crypto.Cipher.AES.MODE_CTR, counter=ctr)
        buf = cipher.encrypt(b'\0' * self.order_len_bin)
        return self._buf_to_exponent(buf)