Exercise: Write a class called scheduler with the following characteristics.
Objects created shold have the following attributes:
Objects created should have the following methods:
This class provides us with a rudimentary way of activating generators embedded inside a class, adding them to a runqueue and then letting something run them. So let's try it. The default microprocess is relatively boring, so let's create some microprocesses that are little more than an age old program that repeatedly displays a messae. To do that we declare a class subclassing microprocess and provide a generator called main. We'll also capture a provided argument:
Note that this generator doesn't ever exit. We can then create a couple of these printers:
X = printer("Hello World")
Y = printer("Game Over") # Another well known 2 word phrase :-)
Next we can create a scheduler:
myscheduler = scheduler()
We can then ask this scheduler to activate the two microprocesses - X & Y :
We can then run our scheduler by iterating through its main method:
for _ in myscheduler.main():
If we run this we get the following output (middle of output snipped):
>>> for _ in myscheduler.main():
As you can see, the scheduler hits the 100th iteration and then halts.
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