fix #973: cpu_percent() may raise ZeroDivisionError.

giampaolo · Feb 7, 2017 · e5a3298 · e5a3298
1 parent fe994a7
commit e5a3298
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diff --git a/HISTORY.rst b/HISTORY.rst
@@ -8,6 +8,7 @@
 **Bug fixes**
 
 - 971_: [Linux] sensors_temperatures() didn't work on CentOS 7.
+- 973_: cpu_percent() may raise ZeroDivisionError.
 
 5.1.2
 =====

diff --git a/psutil/__init__.py b/psutil/__init__.py
@@ -1751,8 +1751,12 @@ def calculate(t1, t2):
 
         busy_delta = t2_busy - t1_busy
         all_delta = t2_all - t1_all
-        busy_perc = (busy_delta / all_delta) * 100
-        return round(busy_perc, 1)
+        try:
+            busy_perc = (busy_delta / all_delta) * 100
+        except ZeroDivisionError:
+            return 0.0
+        else:
+            return round(busy_perc, 1)
 
     # system-wide usage
     if not percpu: