except block is not working in try except in python

Question

I am trying to get list of pods from specific namespace in aws lambda (python).

Its giving right and expected list of pods. But When I pass wrong namespace, it is not skipping the try block and not catching the except block to return the correct response. Any reason for this ?

`import json
from kubernetes.client.rest import ApiException

def get_pods(namespace: str, apiCoreclient: object):

response_output = {}
    response_output["statusCode"] = 200

retList = []
    items = apiCoreclient.list_namespaced_pod(namespace).items
    for item in items:
        try:
            retList.append(item.metadata.name)
            response_output['Pods'] = json.dumps({"Pods": retList})

except ApiException as e:
            response_output["error"] = e.reason
            response_output["statusCode"] = e.status

response_output["isBase64Encoded"] = "False"       
    return json.dumps(response_output)`

Answer

Hi,

In order to [prevent unauthorized users sniffing the existence of namespace](https://github.com/kubernetes/kubernetes/issues/91244), Kubernetes returns a 200 HTTP status code with an empty items array when it does not exist. Therefore, I think that your application behaves as is.

```
kubectl get --raw /api/v1/namespaces/non-exist/pods
{"kind":"PodList","apiVersion":"v1","metadata":{"selfLink":"/api/v1/namespaces/non-exist/pods","resourceVersion":"12568447"},"items":[]}
```
(Example copied from the following [Kubernetes Github issue](https://github.com/kubernetes/kubernetes/issues/91244))

Answer

Exception handling catches any occurrences within a try.  
I think we need to put "items = apiCoreclient.list_namespaced_pod(namespace).items" in the try to get the list of pods.  
So I thought it was necessary to do the following.  
```
import json 
from kubernetes.client.rest import ApiException

def get_pods(namespace: str, apiCoreclient: object):

response_output = {}
response_output["statusCode"] = 200

retList = []
try:
    items = apiCoreclient.list_namespaced_pod(namespace).items
    for item in items:
        retList.append(item.metadata.name)
        response_output['Pods'] = json.dumps({"Pods": retList})
except ApiException as e:
    response_output["error"] = e.reason
    response_output["statusCode"] = e.status

response_output["isBase64Encoded"] = "False"       
return json.dumps(response_output)
```

except block is not working in try except in python

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