Hands-On Reactive Programming with Python

The let operator

The let operator allows us to use a function like an operator. It allows us to use a function that takes an observable as input and returns an observable into a chain of operators, in a seamless way. The following figure shows the workings of this let operator:

Figure 6.7: The let operator

The prototype of this operator is the following one:

Observable.let(self, func, **kwargs)

The implementation of the let operator is simply a call to the func function with the self and kwargs arguments:

func(self, **kwargs)

So, the let operator basically makes func an operator that takes the input stream of the let operator as the input ...