python
from taskflow import task
from taskflow.patterns import linear_flow
class PrintTask(task.Task):
def execute(self):
print("Hello, TaskFlow!")
class AddTask(task.Task):
def execute(self, a, b):
return a + b
flow = linear_flow.Flow("my_flow")
flow.add(PrintTask(), AddTask())
engine = linear_flow.Engine(flow)
engine.run()
