[Streaming] Streaming Cross-Lang API (#7464)

streaming/python/message.py

@@ -8,6 +8,14 @@ class Record:
     def __repr__(self):
         return "Record(%s)".format(self.value)
 
+    def __eq__(self, other):
+        if type(self) is type(other):
+            return (self.stream, self.value) == (other.stream, other.value)
+        return False
+
+    def __hash__(self):
+        return hash((self.stream, self.value))
+
 
 class KeyRecord(Record):
     """Data record in a keyed data stream"""
@@ -15,3 +23,12 @@ class KeyRecord(Record):
     def __init__(self, key, value):
         super().__init__(value)
         self.key = key
+
+    def __eq__(self, other):
+        if type(self) is type(other):
+            return (self.stream, self.key, self.value) ==\
+                   (other.stream, other.key, other.value)
+        return False
+
+    def __hash__(self):
+        return hash((self.stream, self.key, self.value))