Hands-On Reactive Programming with Python

The observable cycle issue

What is the observable cycle issue? The observable cycle issue is a natural consequence of flow-based programming. Flow-based programming, as well as ReactiveX programs, consist of defining a directed graph of streams/observables. There are no constraints on the structure of this graph. So, the final code may consist of either a directed acyclic graph or a directed cyclic graph. Some definitions should clarify what the differences between these graphs are:

• A graph is a structure composed of nodes that are connected to each other by edges
• A directed graph is a graph whose edges have a direction

• An acyclic graph is a graph in which it is not possible to start traversing it from a node and looping back to it during ...