gstlal_ll_inspiral_gracedb_threshold: python3 bytes string io encoding error

gstlal-inspiral/bin/gstlal_ll_inspiral_gracedb_threshold

@@ -80,7 +80,7 @@ options, filenames = parse_command_line()
 
 
 if options.gracedb_far_threshold is not None:
-	post_data = urllib.parse.urlencode({"rate": options.gracedb_far_threshold})
+	post_data = urllib.parse.urlencode({"rate": options.gracedb_far_threshold}).encode('utf-8')
 else:
 	post_data = None
 
@@ -97,7 +97,7 @@ urls = set("%sgracedb_far_threshold.txt" % url.strip() for filename in filenames
 for url in sorted(urls):
 	print("%s:" % url)
 	for line in urllib.request.urlopen(url, data = post_data):
-		OK &= "error" not in line
+		OK &= "error".encode('utf-8') not in line
 		print("\t%s" % line.strip())
 
 if not OK: