Refactor PipeIOServer implementation into several files

pipe_io_server/pipe_writer_thread.py

@@ -0,0 +1,24 @@
+from threading import Thread
+from queue import Queue
+
+
+class PipeWriterThread(Thread):
+    def __init__(self, pipe_path):
+        super().__init__()
+        self._pipe_path = pipe_path
+        self._write_queue = Queue()
+
+    def write(self, message):
+        self._write_queue.put(message, block=True)
+
+    def run(self):
+        while True:
+            message = self._write_queue.get(block=True)
+            if message is None:
+                break
+            with open(self._pipe_path, 'wb') as pipe:
+                pipe.write(message)
+
+    def stop(self):
+        self._write_queue.put(None)
+        self.join()