Handle numpy types in the JSON message encoder

platypush/message/__init__.py

@@ -11,15 +11,41 @@ class Message(object):
     """ Message generic class """
 
     class Encoder(json.JSONEncoder):
-        def default(self, obj):
+        @staticmethod
+        def parse_numpy(obj):
+            try:
+                import numpy as np
+            except ImportError:
+                return
+
+            if isinstance(obj, np.floating):
+                return float(obj)
+            if isinstance(obj, np.integer):
+                return int(obj)
+            if isinstance(obj, np.ndarray):
+                return obj.tolist()
+
+            return
+
+        @staticmethod
+        def parse_datetime(obj):
             if isinstance(obj, datetime.datetime) or \
                     isinstance(obj, datetime.date) or \
                     isinstance(obj, datetime.time):
                 return obj.isoformat()
 
+        def default(self, obj):
+            value = self.parse_datetime(obj)
+            if value is not None:
+                return value
+
             if isinstance(obj, set):
                 return list(obj)
 
+            value = self.parse_numpy(obj)
+            if value is not None:
+                return value
+
             return super().default(obj)
 
     def __init__(self, timestamp=None, *args, **kwargs):

platypush/message/event/__init__.py

@@ -182,7 +182,7 @@ class Event(Message):
                 'type': self.type,
                 **args
             },
-        })
+        }, cls=self.Encoder)
 
 
 class EventMatchResult(object):