diff --git a/flax/Ports.py b/flax/Ports.py
new file mode 100644
--- /dev/null
+++ b/flax/Ports.py
@@ -0,0 +1,29 @@
+# super rough code
+
+class AbstractPort:
+    def __init__(self):
+        pass
+    def put_data(self, value):
+        pass
+    def get_data(self):
+        pass
+
+class Port(AbstractPort):
+    "Connects from a node to exactly one node."
+    def __init__(self, value=None):
+        AbstractPort.__init__(self)
+        self.value = value
+    def put_data(self, value):
+        self.value = value
+    def get_data(self):
+        return self.value
+
+class MultiPort(AbstractPort):
+    "Connects from a node to any number of nodes."
+    def __init__(self, values=None):
+        AbstractPort.__init__(self)
+        self.values = values
+    def put_data(self, values):
+        self.values = values
+    def get_data(self):
+        return self.values