fixes python3 TypeError; python2 intact

exception in vpp_api.vac_write():
"TypeError: initializer for ctype 'char *' must be a bytes or list or
tuple, not str"

Change-Id: Ib6bcfb86e6e36c557174979a110113af689c6754
Signed-off-by: Andrey "Zed" Zaikin <zed.0xff@gmail.com>

diff --git a/src/vpp-api/python/vpp_papi.py b/src/vpp-api/python/vpp_papi.py
index 35edd49..5fa82a3 100644 (file)
--- a/src/vpp-api/python/vpp_papi.py
+++ b/src/vpp-api/python/vpp_papi.py
@@ -639,7 +639,7 @@ class VPP():
         """Send a binary-packed message to VPP."""
         if not self.connected:
             raise IOError(1, 'Not connected')
-        return vpp_api.vac_write(str(buf), len(buf))
+        return vpp_api.vac_write(bytes(buf), len(buf))
 
     def _read(self):
         if not self.connected: