[PATCH v3 09/12] Utils: std_deviation return 0 for an empty list

From: Ondrej Lichtner <olichtne(a)redhat.com&gt; Standard deviation for an empty list is not defined, but to avoid exceptions we'll return 0 instead. Signed-off-by: Ondrej Lichtner <olichtne(a)redhat.com&gt; --- lnst/Common/Utils.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lnst/Common/Utils.py b/lnst/Common/Utils.py index fd86a8e..c283b99 100644 --- a/lnst/Common/Utils.py +++ b/lnst/Common/Utils.py @@ -255,6 +255,8 @@ def dict_to_dot(original_dict, prefix=""): return return_list def std_deviation(values): + if len(values) <= 0: + return 0.0 s1 = 0.0 s2 = 0.0 for val in values: -- 2.1.0