From 36368cd606c39adb584cf92f5a9a41fc44ea571a Mon Sep 17 00:00:00 2001
From: Dave Halter <davidhalter88@gmail.com>
Date: Wed, 8 Oct 2014 15:13:43 +0200
Subject: [PATCH] More removals and cleanups.

---
 jedi/parser/pytree.py | 29 ++++++++---------------------
 1 file changed, 8 insertions(+), 21 deletions(-)

diff --git a/jedi/parser/pytree.py b/jedi/parser/pytree.py
index 66046e3f..054ae091 100644
--- a/jedi/parser/pytree.py
+++ b/jedi/parser/pytree.py
@@ -252,7 +252,8 @@ class Node(Base):
             for el in child.post_order():
                 yield el
 
-    def _prefix_getter(self):
+    @property
+    def prefix(self):
         """
         The whitespace and comments preceding this node in the input.
         """
@@ -260,11 +261,12 @@ class Node(Base):
             return ""
         return self.children[0].prefix
 
-    def _prefix_setter(self, prefix):
+    @prefix.setter
+    def prefix(self, prefix):
         if self.children:
             self.children[0].prefix = prefix
-
-    prefix = property(_prefix_getter, _prefix_setter)
+        else:
+            raise NotImplementedError
 
     def set_child(self, i, child):
         """
@@ -274,7 +276,6 @@ class Node(Base):
         child.parent = self
         self.children[i].parent = None
         self.children[i] = child
-        self.changed()
 
     def insert_child(self, i, child):
         """
@@ -283,7 +284,6 @@ class Node(Base):
         """
         child.parent = self
         self.children.insert(i, child)
-        self.changed()
 
     def append_child(self, child):
         """
@@ -292,7 +292,6 @@ class Node(Base):
         """
         child.parent = self
         self.children.append(child)
-        self.changed()
 
 
 class Leaf(Base):
@@ -316,8 +315,8 @@ class Leaf(Base):
             self._prefix, (self.lineno, self.column) = context
         self.type = type
         self.value = value
-        if prefix is not None:
-            self._prefix = prefix
+        # The whitespace and comments preceding this token in the input.
+        self.prefix = prefix or ''
 
     def __repr__(self):
         """Return a canonical string representation."""
@@ -351,18 +350,6 @@ class Leaf(Base):
         """Return a pre-order iterator for the tree."""
         yield self
 
-    def _prefix_getter(self):
-        """
-        The whitespace and comments preceding this token in the input.
-        """
-        return self._prefix
-
-    def _prefix_setter(self, prefix):
-        self.changed()
-        self._prefix = prefix
-
-    prefix = property(_prefix_getter, _prefix_setter)
-
 
 def convert(gr, raw_node):
     """