Importing a module

Um… How do I go about doing this? I'm a native Python coder, so I'm quite unfamiliar with Lua, but I'm trying to use the flow API.

I have flow saved as 'flow' in the root directory of the turtle.

My test program is as such:

local flow = require "flow"
flow.setPos(0,0,0)
flow.setWaypoint("home")
flow.setWaypoint("there", 10, 1, 0)
flow.goto("there")

However, it throws me a test:1 attempt to call nil.

Split into new topic.

ComputerCraft does not implement require in its code, and instead uses os.loadAPI(pathToAPI).
So If you are wanting to use that API, try this:

os.loadAPI("flow") --#"flow" is the absolute path to this API, so if you placed the API inside a folder, be sure to include that.
flow.setPos(0,0,0)
flow.setWaypoint("home")
flow.setWaypoint("there", 10, 1, 0)
flow.goto("there")

Ah, I see. So the ComputerCraft OS isn't exactly Lua.

No, there are a few minor differences and gotchas, like the os.loadAPI instead of require. Another thing to note is that your program must yield occasionally, which is not a problem for most programs (nearly all if not all turtle calls yield, as do read, sleep, os.pullEvent, etc.).