From 5ed05b4dcb6223a7c1b8e7be7d47a375d643ed12 Mon Sep 17 00:00:00 2001
From: Paul Moore <p.f.moore@gmail.com>
Date: Mon, 29 Sep 2014 19:52:16 +0100
Subject: [PATCH] Prevent zero division error in download speed calculation

---
 pip/utils/ui.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pip/utils/ui.py b/pip/utils/ui.py
index b190345b5..4cf99bf75 100644
--- a/pip/utils/ui.py
+++ b/pip/utils/ui.py
@@ -23,6 +23,9 @@ class DownloadProgressMixin(object):
 
     @property
     def download_speed(self):
+        # Avoid zero division errors...
+        if self.avg == 0.0:
+            return "..."
         return format_size(1 / self.avg) + "/s"
 
     @property