F-scheduler

Features

- add graphlib library to check cycle in the scheduler
- raise error if cycle is detected

python
from f_scheduler import DAG

dag = DAG(use_graphlib=True)

Features

- add repr method to operator classes

Features

- add `update_task` method to `DAG` class
- update task parameters from `Task` instance

Features

- add clear, get_return_value, get_all_tasks method to DAG class

Features

- First release
- add operator and module for function scheduling