[libxml2] Add methods for python3 iterator

[Daniel Veillard <veillard src gnome org>]

commit b3e488b0d90d5b0dbebf02cbd20894367f728d3e
Author: Ron Angeles <ronangeles gmail com>
Date:   Sat Sep 27 21:56:03 2014 -0700

    Add methods for python3 iterator
    
    xmlCoreDepthFirstItertor and xmlCoreBreadthFirstItertr only
    implement a python2-compatible iterator interface. The next()
    method has been changed to __next__(). An alias has been
    defined to keep python2 compatibility.

 python/libxml.py |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/python/libxml.py b/python/libxml.py
index e507e0f..2466cc9 100644
--- a/python/libxml.py
+++ b/python/libxml.py
@@ -530,7 +530,7 @@ class xmlCoreDepthFirstItertor:
         self.parents = []
     def __iter__(self):
         return self
-    def next(self):
+    def __next__(self):
         while 1:
             if self.node:
                 ret = self.node
@@ -542,6 +542,7 @@ class xmlCoreDepthFirstItertor:
             except IndexError:
                 raise StopIteration
             self.node = parent.next
+    next = __next__
 
 #
 # implements the breadth-first iterator for libxml2 DOM tree
@@ -552,7 +553,7 @@ class xmlCoreBreadthFirstItertor:
         self.parents = []
     def __iter__(self):
         return self
-    def next(self):
+    def __next__(self):
         while 1:
             if self.node:
                 ret = self.node
@@ -564,6 +565,7 @@ class xmlCoreBreadthFirstItertor:
             except IndexError:
                 raise StopIteration
             self.node = parent.children
+    next = __next__
 
 #
 # converters to present a nicer view of the XPath returns