ashb commented on a change in pull request #5118: [AIRFLOW-4315] Add monitoring 
API's to airflow
URL: https://github.com/apache/airflow/pull/5118#discussion_r280025567
 
 

 ##########
 File path: airflow/api/common/experimental/get_dag.py
 ##########
 @@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+from airflow.exceptions import AirflowException
+from airflow.api.common.experimental.get_dags import get_dags
+
+
+def get_dag(dag_id):
+    """
+    Returns DAG info for a specific DAG ID.
+    :param dag_id: String identifier of a DAG
+    :return: DAG info for a specific DAG ID.
+    """
+    dag_list = get_dags()
+
+    for dag in dag_list:
+        print(dag['dag_id'] + ' : ' + dag_id)
+        if dag['dag_id'] == dag_id:
+            return dag
+
+    error_message = "Dag id {} not found".format(dag_id)
+    raise AirflowException(error_message)
 
 Review comment:
   ```suggestion
       raise DagNotFound(error_message)
   ```

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