from cognite.client.data_classes import ExtractionPipelineWrite
extpipes = [ExtractionPipelineWrite(name="extPipe1",...), ExtractionPipelineWrite(name="extPipe2",...)]
res = client.extraction_pipelines.create(extpipes)

{
  "items": [
    {
      "externalId": "<string>",
      "name": "<string>",
      "dataSetId": 4503599627370495,
      "description": "<string>",
      "rawTables": [
        {
          "dbName": "<string>",
          "tableName": "<string>"
        }
      ],
      "schedule": "<string>",
      "contacts": [
        {
          "name": "<string>",
          "email": "jsmith@example.com",
          "role": "<string>",
          "sendNotification": true
        }
      ],
      "metadata": {
        "property1": "string",
        "property2": "string"
      },
      "source": "<string>",
      "documentation": "<string>",
      "notificationConfig": {
        "allowedNotSeenRangeInMinutes": 1
      },
      "createdBy": "<string>",
      "id": 4503599627370495,
      "lastSuccess": 123,
      "lastFailure": 123,
      "lastMessage": "<string>",
      "lastSeen": 123,
      "createdTime": 1730204346000,
      "lastUpdatedTime": 1730204346000
    }
  ],
  "nextCursor": "<string>"
}