From 3a40c2f8feed7011fda121fb9497416ab4f8d6bd Mon Sep 17 00:00:00 2001 From: Tyler Goodlet Date: Tue, 8 May 2018 15:47:48 -0400 Subject: [PATCH] Zero bad fields --- piker/calc.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/piker/calc.py b/piker/calc.py index 0ed811fc..c4847696 100644 --- a/piker/calc.py +++ b/piker/calc.py @@ -27,4 +27,6 @@ def percent_change(init, new): """Calcuate the percentage change of some ``new`` value from some initial value, ``init``. """ + if not (init and new): + return 0 return (new - init) / init * 100.