Be explicit about text file encoding

Python PEP 597 (https://www.python.org/dev/peps/pep-0597) recommends to use an
explicit encoding for text files instead of the default locale encoding.
Pylint 2.10 adds a new checker named unspecified-encoding for that.

The present patch adds explicit utf-8 encoding to open() calls in nfvbench and
fixes pylint unspecified-encoding warnings.

Remark: this patch does not change nfvbench behaviour on systems where utf-8 is
the locale encoding, which is generally the case on Linux systems.

Change-Id: Ic4dfb37e1ea958452a0173f7630a68f0d95071ae
Signed-off-by: Gwenael Lambrouin <gwenael.lambrouin@orange.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/nfvbench/traffic_gen/trex_gen.py b/nfvbench/traffic_gen/trex_gen.py
index 41768b1..dff72ac 100644
--- a/nfvbench/traffic_gen/trex_gen.py
+++ b/nfvbench/traffic_gen/trex_gen.py
@@ -761,7 +761,7 @@ class TRex(AbstractTrafficGenerator):
         after = None
         last = None
         try:
-            with open('/tmp/trex.log', 'r') as trex_log:
+            with open('/tmp/trex.log', 'r', encoding="utf-8") as trex_log:
                 for _line in trex_log:
                     line = _line.strip()
                     if line.startswith('Usage:'):
@@ -912,7 +912,7 @@ class TRex(AbstractTrafficGenerator):
                         break
                     last_size = size
                     time.sleep(1)
-                with open(logpath, 'r') as f:
+                with open(logpath, 'r', encoding="utf-8") as f:
                     message = f.read()
             else:
                 message = e.message