- added stream talker

- added stream listener

stream/listener.py

@@ -0,0 +1,9 @@
+from abc import ABC, abstractmethod
+
+class StreamListener(ABC):
+	def __init__(self):
+		pass
+
+	@abstractmethod
+	def on_recv(self, data: bytes):
+		pass

stream/talker.py

@@ -0,0 +1,13 @@
+from abc import ABC
+from stream.listener import StreamListener
+
+class StreamTalker(ABC):
+	def __init__(self):
+		self.sinks = []
+
+	def register_listener(self, sink: StreamListener):
+		self.sinks.append(sink)
+
+	def call_listener(self, data: bytes):
+		for sink in self.sinks:
+			sink.on_recv(data)