tests: Replace usage of tostring() with tobytes()

dongcarl · Fuzzbawls · commit 02fc06f3984e · 2021-10-27T23:42:43.000-07:00
tostring() is deprecated as of python 3.7 and results in stderr output
causing tests to fail
diff --git a/test/functional/test_framework/netutil.py b/test/functional/test_framework/netutil.py
@@ -106,7 +106,7 @@ def all_interfaces():
             max_possible *= 2
         else:
             break
-    namestr = names.tostring()
+    namestr = names.tobytes()
     return [(namestr[i:i+16].split(b'\0', 1)[0],
              socket.inet_ntoa(namestr[i+20:i+24]))
             for i in range(0, outbytes, struct_size)]
