From: W. Trevor King <wking@tremily.us>
Date: Thu, 14 Feb 2013 14:17:08 +0000 (-0500)
Subject: ui.cli: Avoid divide-by-zero errors if no questions were answered
X-Git-Tag: v0.2~5
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=a39b2eb914bed1722877da50260a3b44f61f41f5;p=quizzer.git

ui.cli: Avoid divide-by-zero errors if no questions were answered
---

diff --git a/quizzer/ui/cli.py b/quizzer/ui/cli.py
index 7d7c701..4a0fa49 100644
--- a/quizzer/ui/cli.py
+++ b/quizzer/ui/cli.py
@@ -162,7 +162,8 @@ class CommandLineInterface (UserInterface):
                 question.format_prompt(newline='\n  '))))
         la = len(answers)
         lc = len([a for a in answers if a['correct']])
-        print('answers: {}/{} ({:.2f})'.format(lc, la, float(lc)/la))
+        if la:
+            print('answers: {}/{} ({:.2f})'.format(lc, la, float(lc)/la))
         for answer in answers:
             if answer['correct']:
                 correct = 'correct'
@@ -182,5 +183,7 @@ class CommandLineInterface (UserInterface):
         la = len(answered)
         lc = len(correctly_answered)
         print('answered {} of {} questions'.format(la, len(self.quiz)))
-        print(('of the answered questions, {} ({:.2f}) were answered correctly'
-               ).format(lc, float(lc)/la))
+        if la:
+            print(('of the answered questions, '
+                   '{} ({:.2f}) were answered correctly'
+                   ).format(lc, float(lc)/la))