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

slixmpp/plugins/xep_0131/headers.py

@@ -17,7 +17,7 @@ class XEP_0131(BasePlugin):
 
     name = 'xep_0131'
     description = 'XEP-0131: Stanza Headers and Internet Metadata'
-    dependencies = set(['xep_0030'])
+    dependencies = {'xep_0030'}
     stanza = stanza
     default_config = {
         'supported_headers': set()

slixmpp/plugins/xep_0131/stanza.py

@@ -14,7 +14,7 @@ class Headers(ElementBase):
     name = 'headers'
     namespace = 'http://jabber.org/protocol/shim'
     plugin_attrib = 'headers'
-    interfaces = set(['headers'])
+    interfaces = {'headers'}
     is_extension = True
 
     def get_headers(self):