Be more conservative on patching stdout and stderr

Author: jrmi

mondrian/__init__.py

@@ -20,9 +20,11 @@
 
 # Patch standard output/error if it's not supporting unicode
 # See: https://stackoverflow.com/questions/27347772/print-unicode-string-in-python-regardless-of-environment
-if sys.stdout.encoding is None or sys.stdout.encoding == "ANSI_X3.4-1968":
-    sys.stdout = codecs.getwriter("UTF-8")(sys.stdout.buffer, errors="replace")
-    sys.stderr = codecs.getwriter("UTF-8")(sys.stderr.buffer, errors="replace")
+if getattr(sys.stdout, "encoding", None) is None or sys.stdout.encoding == "ANSI_X3.4-1968":
+    if hasattr(sys.stdout, "buffer"):
+        sys.stdout = codecs.getwriter("UTF-8")(sys.stdout.buffer, errors="replace")
+    if hasattr(sys.err, "buffer"):
+        sys.stderr = codecs.getwriter("UTF-8")(sys.stderr.buffer, errors="replace")
 
 
 def setup_excepthook():