Allow to update an event by UUID, syntax fixes.

pymisp/api.py

@@ -327,6 +327,9 @@ class PyMISP(object):
         return self.get_stix_event(**kwargs)
 
     def update(self, event):
+        if event['Event'].get('uuid'):
+            eid = event['Event']['uuid']
+        else:
             eid = event['Event']['id']
         return self.update_event(eid, event)
 
@@ -450,6 +453,7 @@ class PyMISP(object):
 
         # Send it on its way
         return self.add_named_attribute(event, 'attachment', filename, category, to_ids, comment, distribution, proposal, data=encodedData)
+
     def add_regkey(self, event, regkey, rvalue=None, category='Artifacts dropped', to_ids=True, comment=None, distribution=None, proposal=False):
         if rvalue:
             type_value = 'regkey|value'

pymisp/mispevent.py

@@ -78,6 +78,7 @@ class MISPAttribute(object):
         self.SharingGroup = []
         self.ShadowAttribute = []
         self.disable_correlation = False
+        self.RelatedAttribute = []
 
     def _serialize(self):
         return '{type}{category}{to_ids}{uuid}{timestamp}{comment}{deleted}{value}'.format(