I am trying to build a zap wherein a I need some fancy math calculated. The math allows me to determine which of 6 routes to designate a shipping order to. The math is a haversine formula and I would love to put it directly into a Python Zap step, but it would require the python math library. To get around this, I decided to import the order into Google Sheets and apply the math there. For each new order, one zap creates a new line in a Google Sheet. The ArrayFormula function lets me calculate the distance between the order and each of 6 lat/longs that represent the center of each route. But where I run into trouble is then adding a calculation that can then select the route name for the route with the minimum distance. I can manually add the calculation and it works fine, but because it always involves looking at an array, I run into issues with the ArrayFormula not being applied automatically to subsequent new rows.

So I could use a web hook step, and build a web app that takes the order, does the math and allocates the order to a shipping route. But I’m hoping there’s a simpler way. Perhaps one of these options:

- Is there some way of using python math library in a zap step? Really why don’t they just include Math in the step? What’s the downside?
- Is there some simple way of automatically populating the google sheet row that will not be hampered by the limitations of ArrayFormula? I think a macro triggered by adding a new row is possible, but I cannot find a simple working example. Alternatively, maybe some way of getting around the ArrayFormula limitation that isn’t too unwieldily?

Thanks in advance!

Thom