Hands-On Reactive Programming with Python

The time_interval operator

The time_interval operator measures the time that has elapsed between two emissions of items. The following figure shows the marble diagram for this operator:

Figure 9.21: The time_interval operator

The prototype of this operator is the following:

Observable.time_interval(self, scheduler=None)

Here, scheduler is the scheduler to use to measure the interval. If no scheduler is provided, then the timeout scheduler is used. The time_interval operator emits items of type TimeInterval. They contain two properties:

• value, which contains the value of the source item
• interval, which contains a datetime.timedelta object ...