Update types, allow 0 as attribute value

pymisp/data/describeTypes.json

@@ -69,6 +69,10 @@
         "default_category": "Payload delivery",
         "to_ids": 1
       },
+      "float": {
+        "default_category": "Other",
+        "to_ids": 0
+      },
       "url": {
         "default_category": "External analysis",
         "to_ids": 1
@@ -544,6 +548,7 @@
       "email-dst",
       "email-subject",
       "email-attachment",
+      "float",
       "url",
       "http-method",
       "user-agent",
@@ -998,14 +1003,15 @@
         "other"
       ],
       "Other": [
+        "comment",
+        "text",
+        "other",
         "size-in-bytes",
         "counter",
         "datetime",
         "cpe",
         "port",
-        "comment",
-        "text",
-        "other"
+        "float"
       ]
     }
   }

pymisp/mispevent.py

@@ -130,9 +130,9 @@ class MISPAttribute(object):
 
         type_defaults = self.sane_default[self.type]
 
-        if kwargs.get('value'):
-            self.value = kwargs['value']
-        elif not self.value:
+        self.value = kwargs.get('value')
+
+        if self.value is None:
             raise NewAttributeError('The value of the attribute is required.')
 
         # Default values
@@ -444,7 +444,7 @@ class MISPEvent(object):
                 raise NewEventError('{} is invalid, the analysis has to be in 0, 1, 2'.format(self.analysis))
         if kwargs.get('published') is not None:
             self.unpublish()
-        if kwargs.get("published") == True:
+        if kwargs.get("published") is True:
             self.publish()
         if kwargs.get('date'):
             self.set_date(kwargs['date'])