updated the process flow of function exec_cmd

separate the log expressions to other functions
removed statements that not necessary
output error detail info in exception

Change-Id: I721611d61dee83eb5f40ee954d433073114e231a
JIRA: DOVETAIL-161
Signed-off-by: Ryan.RCS <lihainong@huawei.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/dovetail/container.py b/dovetail/container.py
index 87174727..15e78818 100644
--- a/dovetail/container.py
+++ b/dovetail/container.py
@@ -20,10 +20,10 @@ class Container:
 
     logger = None
 
-    def __init__(cls):
+    def __init__(self):
         pass
 
-    def __str__(cls):
+    def __str__(self):
         pass
 
     @classmethod