Create ast package

smnp/ast/node/block.py

@@ -0,0 +1,17 @@
+from smnp.ast.node.model import Node
+
+
+class BlockNode(Node):
+    pass
+
+
+class BlockItemNode(Node):
+    def __init__(self, statement, parent, pos):
+        Node.__init__(self, parent, pos)
+        self.children.append(statement)
+
+        self.statement = self.children[0]
+
+
+class CloseBlockNode(Node):
+    pass