Error when importing Node: "cannot import name ControlNode"

[jluebben]

Error when importing Node: "cannot import name ControlNode"

[JLuebben]

Thanks for the report.
That is a weird error. Can you post the full stack trace like this:

Traceback (most recent call last):
  File "F:/floppy/bin/Floppy.py", line 3, in <module>
    import floppy.main
  File "F:\floppy\floppy\main.py", line 1, in <module>
    from floppy.graph import Graph
  File "F:\floppy\floppy\graph.py", line 6, in <module>
    from floppy.node import ControlNode, Node, MetaNode, SubGraph
  File "F:\floppy\floppy\node.py", line 673, in <module>
    class ControlNode(Node):
  File "F:\floppy\floppy\node.py", line 690, in ControlNode
    a
NameError: name 'a' is not defined

You can of course remove the file paths

Unfortunately, development of new features was on hold for a while due to more pressing responsibilities. Creating nodes at runtime was the last thing I was working on and will be the first thing to get done. I will probably find time next month.

[theshinyknight]

Sure, I am posting the stack trace here.

The steps were

• Download the zip file
• decompress it and rename the extracted folder
• add the folder path to PYTHONPATH
• open Python3 console and from floppy.node import Node, Input, Output, Tag, abstractNode, as described in the readme

Importing floppy works, but when I import from floppy.node, I get the import name error on ControlNode

>>> from floppy.node import Node, Input, Output, Tag, abstractNode Traceback (most recent call last): File "<stdin>", line 1, in <module> File ".../floppy/node.py", line 6, in <module> import floppy.graph File "...,/floppy/graph.py", line 6, in <module> from floppy.node import ControlNode, Node, MetaNode, SubGraph ImportError: cannot import name 'ControlNode'

Thanks for looking into the runtime creation of nodes; It would be useful to create nodes at runtime, especially if you are using Floppy as simple action executor.

[JLuebben]

I was able to reproduce the issue. My guess it that I have a cyclic dependency in my import statements and importing something 'from floppy.node' does not work if not 'floppy.graph' was imported first.
I will commit a fix soon.

Starting the editor directly via the script 'Floppy.py' in the 'bin' subdirectory should work.

[theshinyknight]

Thanks for looking into this; I will give it a spin and see if swapping import statements works.