Adding tests ensuring locale setting is passed to python backend inte…

…rpreter

qa/L0_backend_python/env/test.sh

@@ -123,6 +123,42 @@ for EXPECTED_VERSION_STRING in "$PY36_VERSION_STRING" "$PY37_VERSION_STRING" "$P
         RET=1
     fi
 done
+
+# Test default (non set) locale in python stub processes
+# NOTE: In certain pybind versions, the locale settings may not be propagated from parent to
+#       stub processes correctly. See https://github.com/triton-inference-server/python_backend/pull/260.
+export LC_ALL=INVALID
+grep "Locale is (None, None)" $SERVER_LOG
+    if [ $? -ne 0 ]; then
+        cat $SERVER_LOG
+        echo -e "\n***\n*** Default unset Locale was not found in Triton logs. \n***"
+        RET=1
+    fi
+set -e
+
+rm $SERVER_LOG
+
+# Test locale set via environment variable in python stub processes
+# NOTE: In certain pybind versions, the locale settings may not be propagated from parent to
+#       stub processes correctly. See https://github.com/triton-inference-server/python_backend/pull/260.
+export LC_ALL=C.UTF-8
+run_server
+if [ "$SERVER_PID" == "0" ]; then
+    echo -e "\n***\n*** Failed to start $SERVER\n***"
+    cat $SERVER_LOG
+    exit 1
+fi
+
+kill $SERVER_PID
+wait $SERVER_PID
+
+set +e
+grep "Locale is ('en_US', 'UTF-8')" $SERVER_LOG
+    if [ $? -ne 0 ]; then
+        cat $SERVER_LOG
+        echo -e "\n***\n*** Locale UTF-8 was not found in Triton logs. \n***"
+        RET=1
+    fi
 set -e
 
 rm $SERVER_LOG

qa/python_models/python_version/model.py

@@ -27,6 +27,7 @@
 import numpy as np
 import sys
 import os
+import locale
 import triton_python_backend_utils as pb_utils
 
 
@@ -54,6 +55,7 @@ def initialize(self, args):
         print(
             f'Python version is {sys.version_info.major}.{sys.version_info.minor}, NumPy version is {np.version.version}, and Tensorflow version is {tensorflow.__version__}',
             flush=True)
+        print(f'Locale is {locale.getlocale()}', flush=True)
 
     def execute(self, requests):
         """ This function is called on inference request.