sed -i 's/set((\(.*\),))$/{\1}/g' **/*.py

slixmpp/features/feature_mechanisms/stanza/challenge.py

@@ -19,7 +19,7 @@ class Challenge(StanzaBase):
 
     name = 'challenge'
     namespace = 'urn:ietf:params:xml:ns:xmpp-sasl'
-    interfaces = set(('value',))
+    interfaces = {'value'}
     plugin_attrib = name
 
     def setup(self, xml):

slixmpp/features/feature_mechanisms/stanza/failure.py

@@ -18,7 +18,7 @@ class Failure(StanzaBase):
     namespace = 'urn:ietf:params:xml:ns:xmpp-sasl'
     interfaces = set(('condition', 'text'))
     plugin_attrib = name
-    sub_interfaces = set(('text',))
+    sub_interfaces = {'text'}
     conditions = set(('aborted', 'account-disabled', 'credentials-expired',
         'encryption-required', 'incorrect-encoding', 'invalid-authzid',
         'invalid-mechanism', 'malformed-request', 'mechansism-too-weak',

slixmpp/features/feature_mechanisms/stanza/response.py

@@ -19,7 +19,7 @@ class Response(StanzaBase):
 
     name = 'response'
     namespace = 'urn:ietf:params:xml:ns:xmpp-sasl'
-    interfaces = set(('value',))
+    interfaces = {'value'}
     plugin_attrib = name
 
     def setup(self, xml):

slixmpp/features/feature_starttls/stanza.py

@@ -16,7 +16,7 @@ class STARTTLS(ElementBase):
 
     name = 'starttls'
     namespace = 'urn:ietf:params:xml:ns:xmpp-tls'
-    interfaces = set(('required',))
+    interfaces = {'required'}
     plugin_attrib = name
 
     def get_required(self):