[GitHub] [airflow] hussein-awala commented on a diff in pull request #29760: `KubernetesPodOperator._render_nested_template_fields` improved by changing the conditionals for a map

["hussein-awala (via GitHub)" <gi...@apache.org>]

hussein-awala commented on code in PR #29760:
URL: https://github.com/apache/airflow/pull/29760#discussion_r1117977100


##########
airflow/providers/cncf/kubernetes/operators/kubernetes_pod.py:
##########
@@ -378,22 +378,16 @@ def _render_nested_template_fields(
         seen_oids: set,
     ) -> None:
         if id(content) not in seen_oids:
-            template_fields: tuple | None = None
-
-            if isinstance(content, k8s.V1EnvVar):
-                template_fields = ("value", "name")
-
-            if isinstance(content, k8s.V1ResourceRequirements):
-                template_fields = ("limits", "requests")
-
-            if isinstance(content, k8s.V1Volume):
-                template_fields = ("name", "persistent_volume_claim")
-
-            if isinstance(content, k8s.V1VolumeMount):
-                template_fields = ("name",)
-
-            if isinstance(content, k8s.V1PersistentVolumeClaimVolumeSource):
-                template_fields = ("claim_name",)
+            try:

Review Comment:
   @jose-lpa Thank you for opening this PR!
   
   I agree with @potiuk about the need to check if the object is derived from the type, where some people extend the k8s classes to define their own default values or simplifying the creating of its instances, ex:
   ```python
   class CompanyResourceRequirements(k8s.V1ResourceRequirements):
       def __init__(self, cpu, memory):
           resources = {"cpu": cpu, "memory": memory}
           super().__init__(limits=resources, requests=resources)
   
   resources_requirements = CompanyResourceRequirements(cpu="1", memory="512m")
   isinstance(resource_requirements, k8s.V1ResourceRequirements)
   >>> True
   ```
   Also we will not gain a lot because python needs resources to create the dictionary and create the hashes. Instead we can replace the `if` by `elif` and avoid the useless checks when we find the class of our instance:
   ```python
               if isinstance(content, k8s.V1EnvVar):
                   template_fields = ("value", "name")
               elif isinstance(content, k8s.V1ResourceRequirements):
                   template_fields = ("limits", "requests")
               elif isinstance(content, k8s.V1Volume):
                   template_fields = ("name", "persistent_volume_claim")
               elif isinstance(content, k8s.V1VolumeMount):
                   template_fields = ("name",)
               elif isinstance(content, k8s.V1PersistentVolumeClaimVolumeSource):
                   template_fields = ("claim_name",)
   ```
   WDYT



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