[spp] [PATCH 2/2] controller: fix encoding in topo command

[ogawa.yasufumi@lab.ntt.co.jp]

From: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>

For python3, it is required to treat str and bytes explicitly for
sending and receiving messages via socket.

This update is for encoding messages to 'utf-8' similar to previous
commit '7c5193f'.

Signed-off-by: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
---
 src/controller/topo.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/controller/topo.py b/src/controller/topo.py
index d578290..e608961 100644
--- a/src/controller/topo.py
+++ b/src/controller/topo.py
@@ -32,7 +32,8 @@ class Topo(object):
     def show(self, dtype, size):
         res_ary = []
         for sec_id in self.sec_ids:
-            self.m2s_queues[sec_id].put("status")
+            msg = "status"
+            self.m2s_queues[sec_id].put(msg.encode('utf-8'))
             res = self.format_sec_status(
                 sec_id, self.s2m_queues[sec_id].get(True))
             res_ary.append(res)
@@ -47,7 +48,8 @@ class Topo(object):
     def output(self, fname, ftype="dot"):
         res_ary = []
         for sec_id in self.sec_ids:
-            self.m2s_queues[sec_id].put("status")
+            msg = "status"
+            self.m2s_queues[sec_id].put(msg.encode('utf-8'))
             res = self.format_sec_status(
                 sec_id, self.s2m_queues[sec_id].get(True))
             res_ary.append(res)
@@ -266,7 +268,6 @@ class Topo(object):
         from distutils import spawn
 
         # TODO(yasufum) Add check for using only supported terminal
-
         if spawn.find_executable("img2sixel") is not None:
             img_cmd = "img2sixel"
         else:
-- 
2.17.1