I’d like to write something like this for a stack output where an API changed the exported name between versions

try 
  output_value: str = stack.require_output("new_api_name")
except Error:
  output_value: str = stack.require_output("old_api_name")

I had an issue above when I tried this for a reference using “old_api_name”. How can I  write a python pulumi program that will behave as expected?

I had an issue above when I tried this for a reference using “old_api_name”.

Can you say more about what exactly the issue was? Unless

Error

is a python

Exception

defined in your code, I’m not sure if that would work since

require_output

returns a

KeyError

. You could try:

try:
  output_value: str = stack.require_output("new_api_name")
except KeyError:
  output_value: str = stack.require_output("old_api_name")

Alternatively, you could use

get_output

instead of

require_output

so it doesn’t error and fetch the “old_api_name” if

None

is returned:

output_value = stack.get_output("new_api_name")
if output_value is None:
  output_value = stack.get_output("old_api_name")

I don’t believe I returned a key error. I wrote something similar to get_output code above. None was not returned and it didn’t function.