diff --git a/avahi-python/avahi-discover/avahi-discover.py b/avahi-python/avahi-discover/avahi-discover.py
index 95ccca5..704abf8 100755
--- a/avahi-python/avahi-discover/avahi-discover.py
+++ b/avahi-python/avahi-discover/avahi-discover.py
@@ -209,10 +209,10 @@ class Main_window:
             self.new_service_type(interface, protocol, self.stype, domain)
 
     def new_domain(self,interface, protocol, domain, flags):
-        if self.zc_ifaces.has_key((interface,protocol)) == False:
+        if ((interface,protocol) in self.zc_ifaces) == False:
             ifn = self.get_interface_name(interface, protocol)
             self.zc_ifaces[(interface,protocol)] = self.insert_row(self.treemodel, None, ifn,None,interface,protocol,None,domain)
-        if self.zc_domains.has_key((interface,protocol,domain)) == False:
+        if ((interface,protocol,domain) in self.zc_domains) == False:
             self.zc_domains[(interface,protocol,domain)] = self.insert_row(self.treemodel, self.zc_ifaces[(interface,protocol)], domain,None,interface,protocol,None,domain)
         if domain != "local":
             self.browse_domain(interface, protocol, domain)
@@ -233,7 +233,7 @@ class Main_window:
         if len(txt) != 0:
             txts = ""
             txtd = self.pair_to_dict(txt)
-            for k,v in txtd.items():
+            for k,v in list(txtd.items()):
                 txts+="<b>" + _("TXT") + " <i>%s</i></b> = %s\n" % (k,v)
         else:
             txts = "<b>" + _("TXT Data:") + "</b> <i>" + _("empty") + "</i>"