Python 3 compatibility

pylib/gyp/easy_xml.py

 # Copyright (c) 2011 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import re
 import os
 
+try:
+  reduce
+except NameError:
+  from functools import reduce
 
 def XmlToString(content, encoding='utf-8', pretty=False):
   """ Writes the XML content to disk, touching the file only if it has changed.
 
   Visual Studio files have a lot of pre-defined structures.  This function makes
   it easy to represent these structures as Python data structures, instead of
   having to create a lot of function calls.
 
   Each XML element of the content is represented as a list composed of:
   1. The name of the element, a string,
@@ skipping 54 matching lines @@
     new_line = ''
   name = specification[0]
   if not isinstance(name, str):
     raise Exception('The first item of an EasyXml specification should be '
                     'a string.  Specification was ' + str(specification))
   xml_parts.append(indentation + '<' + name)
 
   # Optionally in second position is a dictionary of the attributes.
   rest = specification[1:]
   if rest and isinstance(rest[0], dict):
-    for at, val in sorted(rest[0].iteritems()):
+    for at, val in sorted(rest[0].items()):
       xml_parts.append(' %s="%s"' % (at, _XmlEscape(val, attr=True)))
     rest = rest[1:]
   if rest:
     xml_parts.append('>')
     all_strings = reduce(lambda x, y: x and isinstance(y, str), rest, True)
     multi_line = not all_strings
     if multi_line and new_line:
       xml_parts.append(new_line)
     for child_spec in rest:
       # If it's a string, append a text node.
@@ skipping 55 matching lines @@
 
 def _XmlEscape(value, attr=False):
   """ Escape a string for inclusion in XML."""
   def replace(match):
     m = match.string[match.start() : match.end()]
     # don't replace single quotes in attrs
     if attr and m == "'":
       return m
     return _xml_escape_map[m]
   return _xml_escape_re.sub(replace, value)