Python samples: Properly write strings to log

In the commented code for Python 3, use decode() to write a string
instead of a byte string (b'...').

close #260

samples/filter_innd.py

@@ -209,13 +209,21 @@ def filter_art(self, art):
 
         # Example of decoding the Newsgroups header field with Python 3.x
         # using bytes object.
-        #  header = art[Newsgroups].tobytes().decode("utf-8")
+        #  header = (
+        #      art[Newsgroups]
+        #      .tobytes()
+        #      .decode("utf-8", errors="backslashreplace")
+        #  )
         #  syslog("notice", "Newsgroups header field: %s" % header)
         #
         # Another example with the Distribution header field, that may not
         # be present in the headers, and also not in UTF-8.
         #  if art[Distribution]:
-        #      header = art[Distribution].tobytes()
+        #      header = (
+        #          art[Distribution]
+        #          .tobytes()
+        #          .decode(errors="backslashreplace")
+        #      )
         #      syslog("notice", "Distribution header field: %s" % header)
         #
         # Other examples:

samples/nnrpd_access.py

@@ -58,14 +58,18 @@ def access(self, attributes):
         #      "n_a access() invoked: hostname %s, ipaddress %s, port %lu,"
         #      " interface %s, intipaddr %s, intport %lu, user %s"
         #      % (
-        #          attributes["hostname"].tobytes(),
-        #          attributes["ipaddress"].tobytes(),
+        #          attributes["hostname"]
+        #          .tobytes()
+        #          .decode(errors="backslashreplace"),
+        #          attributes["ipaddress"].tobytes().decode(),
         #          attributes["port"],
-        #          attributes["interface"].tobytes(),
-        #          attributes["intipaddr"].tobytes(),
+        #          attributes["interface"].tobytes().decode(),
+        #          attributes["intipaddr"].tobytes().decode(),
         #          attributes["intport"],
         #          (
-        #              attributes["user"].tobytes()
+        #              attributes["user"]
+        #              .tobytes()
+        #              .decode(errors="backslashreplace")
         #              if attributes["user"]
         #              else "-"
         #          ),

samples/nnrpd_auth.py

@@ -70,14 +70,18 @@ def authenticate(self, attributes):
         #      "n_a authenticate() invoked: hostname %s, ipaddress %s,"
         #      " port %lu, interface %s, intipaddr %s, intport %lu, user %s"
         #      % (
-        #          attributes["hostname"].tobytes(),
-        #          attributes["ipaddress"].tobytes(),
+        #          attributes["hostname"]
+        #          .tobytes()
+        #          .decode(errors="backslashreplace"),
+        #          attributes["ipaddress"].tobytes().decode(),
         #          attributes["port"],
-        #          attributes["interface"].tobytes(),
-        #          attributes["intipaddr"].tobytes(),
+        #          attributes["interface"].tobytes().decode(),
+        #          attributes["intipaddr"].tobytes().decode(),
         #          attributes["intport"],
         #          (
-        #              attributes["user"].tobytes()
+        #              attributes["user"]
+        #              .tobytes()
+        #              .decode(errors="backslashreplace")
         #              if attributes["user"]
         #              else "-"
         #          ),

samples/nnrpd_dynamic.py

@@ -62,16 +62,22 @@ def dynamic(self, attributes):
         #      " ipaddress %s, port %lu, interface %s, intipaddr %s,"
         #      " intport %lu, user %s"
         #      % (
-        #          attributes["type"].tobytes(),
-        #          attributes["newsgroup"].tobytes(),
-        #          attributes["hostname"].tobytes(),
-        #          attributes["ipaddress"].tobytes(),
+        #          attributes["type"].tobytes().decode(),
+        #          attributes["newsgroup"]
+        #          .tobytes()
+        #          .decode(errors="backslashreplace"),
+        #          attributes["hostname"]
+        #          .tobytes()
+        #          .decode(errors="backslashreplace"),
+        #          attributes["ipaddress"].tobytes().decode(),
         #          attributes["port"],
-        #          attributes["interface"].tobytes(),
-        #          attributes["intipaddr"].tobytes(),
+        #          attributes["interface"].tobytes().decode(),
+        #          attributes["intipaddr"].tobytes().decode(),
         #          attributes["intport"],
         #          (
-        #              attributes["user"].tobytes()
+        #              attributes["user"]
+        #              .tobytes()
+        #              .decode(errors="backslashreplace")
         #              if attributes["user"]
         #              else "-"
         #          ),