add a key check to fix bug

JIRA:YARDSTICK-160

Change-Id: I2cfe91b30d0c906417234d5bf7787fb5dc568921
Signed-off-by: jean.gaoliang@huawei.com <jean.gaoliang@huawei.com>

diff --git a/yardstick/cmd/commands/task.py b/yardstick/cmd/commands/task.py
index 6e117ed..85e35af 100755 (executable)
--- a/yardstick/cmd/commands/task.py
+++ b/yardstick/cmd/commands/task.py
@@ -136,9 +136,10 @@ class TaskParser(object):
 
         for cfg_attrs in context_cfgs:
             # config external_network based on env var
-            for _, attrs in cfg_attrs["networks"].items():
-                attrs["external_network"] = os.environ.get('EXTERNAL_NETWORK',
-                                                           'net04_ext')
+            if "networks" in cfg_attrs:
+                for _, attrs in cfg_attrs["networks"].items():
+                    attrs["external_network"] = os.environ.get(
+                        'EXTERNAL_NETWORK', 'net04_ext')
             context = Context()
             context.init(cfg_attrs)