[dts] [PATCH V1 5/5] framework/virt_dut:optimize code

[Haiyang Zhao]

*.when out returned by self.tester.send_ping6 is None,
  it will raise an exception, and cause VM init failed, fixed it. 
*.fix pep8 issue.

Signed-off-by: Haiyang Zhao <haiyangx.zhao at intel.com>
---
 framework/virt_dut.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/framework/virt_dut.py b/framework/virt_dut.py
index a916b72..ebd48d8 100644
--- a/framework/virt_dut.py
+++ b/framework/virt_dut.py
@@ -411,7 +411,7 @@ class VirtDut(DPDKdut):
                 out = self.tester.send_ping6(
                     remotePort, ipv6, self.get_mac_address(vmPort))
 
-                if ('64 bytes from' in out):
+                if out and '64 bytes from' in out:
                     self.logger.info(
                         "PORT MAP: [dut %d: tester %d]" % (vmPort, remotePort))
                     self.ports_map[vmPort] = remotePort
-- 
1.8.3.1