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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_access_service(price, service_endpoint, consume_endpoint, timeout=None):
 """ Publish an asset with an `Access` service according to the supplied attributes. :param price: Asset price, int :param service_endpoint: str URL for initiating service access request :param consume_endpoint: str URL to consume service :param timeout: int amount of time in seconds before the agreement expires :return: Service instance or None """

        timeout = timeout or 3600  # default to one hour timeout
        service = ServiceDescriptor.access_service_descriptor(
            price, service_endpoint, consume_endpoint, timeout, ''
        )

        return service