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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 create_token(self):
 """Create a session protection token for this client. This method generates a session protection token for the cilent, which consists in a hash of the user agent and the IP address. This method can be overriden by subclasses to implement different token generation algorithms. """

        user_agent = request.headers.get('User-Agent')
        if user_agent is None:  # pragma: no cover
            user_agent = 'no user agent'
        user_agent = user_agent.encode('utf-8')
        base = self._get_remote_addr() + b'|' + user_agent
        h = sha256()
        h.update(base)
        return h.hexdigest()