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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_bulk(self, resource, timeout=-1):
 """ Creates bulk Ethernet networks. Args: resource (dict):
 Specifications to create in bulk. timeout: Timeout in seconds. Wait for task completion by default. The timeout does not abort the operation in OneView; it just stops waiting for its completion. Returns: list: List of created Ethernet Networks. """

        uri = self.URI + '/bulk'
        default_values = self._get_default_values(self.BULK_DEFAULT_VALUES)
        updated_data = self._helper.update_resource_fields(resource, default_values)

        self._helper.create(updated_data, uri=uri, timeout=timeout)

        return self.get_range(resource['namePrefix'], resource['vlanIdRange'])