Fletcher Foti

You mean like have a dependency graph? I definitely thought that was a promising idea but Matt thought it would be a lot of work at the time...

No there's no DG - lazy evaluation happens when an item gets injected into a function. If it's in the cache it doesn't get re-evaluated. The user has to invalidate...

I definitely agree that building a DF and invalidating the cache appropriately when something gets updated would be awesome. The problem is that your dependency graph is usually built based...

Right - that's the best I can come up with too... orca knows when it's inside that method, and it can capture any calls to get_table or `__getattr__` and know...

The node ids have to be ints, so I'm guessing that for nodes["x"] and/or nodes["y"] the *index* (not the values) is of type double but should be of type long....

Hmm, from looking at the code, it's most likely with your edges. You might want to recreate [this](https://github.com/UDST/pandana/blob/master/pandana/network.py#L59) line of code with your data and see what the type of...

Not sure on this one. My guess is it's something fairly simple we're missing. Might need sample data and sample code to diagnose it...

I can't imagine why precompute would be any different. I don't think that code has been touched in ages. Only thing I can think of to set twoway=False and see...

I don't know exactly, but this is almost always because you have one column that is exactly the same as another column so the estimation is not identified. The most...

I _think_ (I'm not totally sure) that you need a building_id in the households table. Do you have that column? The vacant_residential_units requires there to be a building_id.