# HG changeset patch
# User Jeff Hammel <k0scist@gmail.com>
# Date 1425353066 28800
# Node ID b5aea10e611db95d2fc1ed7f53d0036f0b839c80
# Parent  b755a8d946decdb7510b01c0b669bc5ae48e9f18
wip

diff -r b755a8d946de -r b5aea10e611d numerics/text_display.py
--- a/numerics/text_display.py	Mon Mar 02 18:35:16 2015 -0800
+++ b/numerics/text_display.py	Mon Mar 02 19:24:26 2015 -0800
@@ -42,6 +42,10 @@
         """validate options"""
         if options.width < 1:
             self.error("Width must be greater than zero (You gave: {})".format(options.width))
+        out_of_range = [i for i in options.fraction
+                        if not (0. < i < 1.)]
+        if out_of_range:
+            self.error("Fractions should be between 0 and 1")
 
 def main(args=sys.argv[1:]):
     """CLI"""