gistfile1.py

import luigi

# Here we are importing our own tasks, provided they are 
# arranged in a python module (folder) named "components"
from components.SomeTaskA import SomeTaskA
from components.SomeTaskB import SomeTaskB
from components.SomeTaskC import SomeTaskC
 
# ------------------------------------------
# DEFINE THE MAIN WORKFLOW DEPENDENCY GRAPH
# ------------------------------------------

class MyTaskB(SomeTaskB):
  def requires(self):
    return SomeTaskA()  
    
class MyTaskC(SomeTaskC):
  def requires(self):
    return SomeTaskB()  
 
 
# Build (and run) the workflow
luigi.build(MyTaskC(), workers=16, local_scheduler=True)