Message 74313 - Python tracker

The fix can be changed to be specific to POSIX system:
+    if name == 'posix' \
+    and isinstance(file, bytes):
+        encoding = sys.getfilesystemencoding()
+        PATH = (bytes(dir, encoding) for dir in PATH)

My example was incorrect. The good example is:
   python -c "import os; os.execvp('pwd', ['pwd'])