Hands-On Reactive Programming with Python

The catch_exception operator

The catch_exception operator allows us to catch any error coming from its source observable and to continue to emit items. When the error occurs in the source observable, the catch_exception operator continues the sequence with another sequence of items. Its marble diagram is shown in the following figure:

Figure 4.15: The catch_exception operator

Its prototype is as follows:

Observable.catch_exception(self, second=None, handler=None):

The optional second argument is either an observable to chain when an error occurs in the source observable or a function that returns an observable. The optional handler argument ...