I'd like to be able to create an exception hierarchy in PyO3. In Python I would write something like:
class PolarsError(Exception):
...
class OutOfBoundsError(PolarsError):
...Then users could catch the specific error thrown by the code (OutOfBoundsError), or use catch more general exception type (PolarsError).
Right now, I'm using the create_exception! macro to define the exceptions, as mentioned in the user guide. However, this does not allow for specifying a hierarchy.
I've found some discussion on subclassing exceptions:
...from this, it seems like my wish is already possible. However, I cannot find any code examples of how this is supposed to work. If it is already possible, could someone point me in the right direction? If not, consider this a feature request!
I'd like to be able to create an exception hierarchy in PyO3. In Python I would write something like:
Then users could catch the specific error thrown by the code (
OutOfBoundsError), or use catch more general exception type (PolarsError).Right now, I'm using the
create_exception!macro to define the exceptions, as mentioned in the user guide. However, this does not allow for specifying a hierarchy.I've found some discussion on subclassing exceptions:
...from this, it seems like my wish is already possible. However, I cannot find any code examples of how this is supposed to work. If it is already possible, could someone point me in the right direction? If not, consider this a feature request!