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/nfvbench.py b/nfvbench/nfvbench.py
index 740dca2..891b2bb 100644
--- a/nfvbench/nfvbench.py
+++ b/nfvbench/nfvbench.py
@@ -721,7 +721,7 @@ def main():
             sys.exit(0)
 
         if opts.summary:
-            with open(opts.summary) as json_data:
+            with open(opts.summary, encoding="utf-8") as json_data:
                 result = json.load(json_data)
                 if opts.user_label:
                     result['config']['user_label'] = opts.user_label
@@ -736,7 +736,7 @@ def main():
         # dump the contents of the trex log file
         if opts.show_trex_log:
             try:
-                with open('/tmp/trex.log') as trex_log_file:
+                with open('/tmp/trex.log', encoding="utf-8") as trex_log_file:
                     print(trex_log_file.read(), end="")
             except FileNotFoundError:
                 print("No TRex log file found!")