#2503 make singletons compared with "is" not == or !=

Thanks to Wummel for the patch

1 files changed, 4 insertions, 4 deletions

diff --git a/Demo/rpc/rpc.py b/Demo/rpc/rpc.py
index 141fe09..0a14bf2 100644
--- a/Demo/rpc/rpc.py
+++ b/Demo/rpc/rpc.py
@@ -264,13 +264,13 @@ class Client:
 
     def mkcred(self):
         # Override this to use more powerful credentials
-        if self.cred == None:
+        if self.cred is None:
             self.cred = (AUTH_NULL, make_auth_null())
         return self.cred
 
     def mkverf(self):
         # Override this to use a more powerful verifier
-        if self.verf == None:
+        if self.verf is None:
             self.verf = (AUTH_NULL, make_auth_null())
         return self.verf
 
@@ -321,7 +321,7 @@ last_resv_port_tried = None
 def bindresvport(sock, host):
     global last_resv_port_tried
     FIRST, LAST = 600, 1024 # Range of ports to try
-    if last_resv_port_tried == None:
+    if last_resv_port_tried is None:
         import os
         last_resv_port_tried = FIRST + os.getpid() % (LAST-FIRST)
     for i in range(last_resv_port_tried, LAST) + \
@@ -814,7 +814,7 @@ class UDPServer(Server):
     def session(self):
         call, host_port = self.sock.recvfrom(8192)
         reply = self.handle(call)
-        if reply != None:
+        if reply is not None:
             self.sock.sendto(reply, host_port)