Slightly leaky abstraction -- figure out the best way to extend this

[elijahbenizzy]

This is for an extension of hamilton called hamiltime. Currently it's perfectly abstracted away except for this enum. Let's figure out how to make it a completely separate product.

hamilton/hamilton/node.py

Line 20 in c86ddd2

PRIOR_RUN = 3 # This node's value sould be taken from a prior run. This is not used in a standard function graph, but it comes in handy for repeatedly running the same one.

Some ideas:

1. Release hamilton with hamiltime
2. Have this be an extensible class that hamiltime can overwrite
3. Have the function_graph, not the node type know about the node sources
4. ...

[elijahbenizzy]

We are moving repositories! Please see the new version of this issue at DAGWorks-Inc/hamilton#8. Also, please give us a star/update any of your internal links.