Retry if not exception type?

[william-silversmith]

Hi, I was wondering if there's an easy way to say retry for everything except this list of exceptions?

For example, I want to retry for all server errors but not client errors.

[yuvadm]

You probably want to use retry_unless_exception_type and chain it with boolean or operators for all the different types you want to ignore for the retry behavior.

[asqui]

Even simpler: retry_unless_exception_type can also take a tuple of exception types.

[yuvadm]

I ran into a serious pitfall with retry_unless_exception_type - see #137 (comment)

[asqui]

@william-silversmith : When you say "retry for everything except this list of exceptions" does everything include successful returns, or just exceptions, from the function being wrapped?

Intuitively, I suspect that you never want to retry on successful results. Unfortunately retry_unless_exception_type will retry on successful results (as detailed in #137) which is not what you want.

I have just proposed a new method, retry_if_exception_not_of_type which will do what I suspect you want. Feel free to comment on #137 with your feedback on this proposal.

[william-silversmith]

Yes, I want to retry only on server errors. If the action succeeds it should not retry. If the error is the client's fault (e.g. wrong authentication or even something lower level) it should not retry until the problem is inspected manually.