__docformat__ = 'restructuredtext'
from .engine import Node, MapNode, Workflow
from .utils import write_prov

__docformat__ = 'restructuredtext'
from engine import Node, MapNode, JoinNode, Workflow
from .utils import write_prov

Add JoinNode to pipeline init
Add JoinNode to pipeline init

  __docformat__ = 'restructuredtext'
- from .engine import Node, MapNode, Workflow
+ from engine import Node, MapNode, JoinNode, Workflow
  from .utils import write_prov
  
Add JoinNode to pipeline init
## Code Before:
__docformat__ = 'restructuredtext'
from .engine import Node, MapNode, Workflow
from .utils import write_prov

## Instruction:
Add JoinNode to pipeline init
## Code After:
__docformat__ = 'restructuredtext'
from engine import Node, MapNode, JoinNode, Workflow
from .utils import write_prov
