Python 3 compatibility

pylib/gyp/xcode_emulation.py

Index: pylib/gyp/xcode_emulation.py
diff --git a/pylib/gyp/xcode_emulation.py b/pylib/gyp/xcode_emulation.py
index 2dec19e5d6fb548bd2002c37f88dbcf0086eecab..22bac4d786f7f83044f19ac3477ba6350d5a73f8 100644
--- a/pylib/gyp/xcode_emulation.py
+++ b/pylib/gyp/xcode_emulation.py
@@ -7,6 +7,8 @@ This module contains classes that help to emulate xcodebuild behavior on top of
 other build systems, such as make and ninja.
 """
 
+from __future__ import print_function
+
 import copy
 import gyp.common
 import os
@@ -73,7 +75,7 @@ class XcodeArchsDefault(object):
             if arch not in expanded_archs:
               expanded_archs.append(arch)
         except KeyError as e:
-          print 'Warning: Ignoring unsupported variable "%s".' % variable
+          print('Warning: Ignoring unsupported variable "%s".' % variable)
       elif arch not in expanded_archs:
         expanded_archs.append(arch)
     return expanded_archs
@@ -171,7 +173,7 @@ class XcodeSettings(object):
     # the same for all configs are implicitly per-target settings.
     self.xcode_settings = {}
     configs = spec['configurations']
-    for configname, config in configs.iteritems():
+    for configname, config in configs.items():
       self.xcode_settings[configname] = config.get('xcode_settings', {})
       self._ConvertConditionalKeys(configname)
       if self.xcode_settings[configname].get('IPHONEOS_DEPLOYMENT_TARGET',
@@ -197,8 +199,8 @@ class XcodeSettings(object):
           new_key = key.split("[")[0]
           settings[new_key] = settings[key]
       else:
-        print 'Warning: Conditional keys not implemented, ignoring:', \
-              ' '.join(conditional_keys)
+        print('Warning: Conditional keys not implemented, ignoring:', \
+              ' '.join(conditional_keys))
       del settings[key]
 
   def _Settings(self):
@@ -216,7 +218,7 @@ class XcodeSettings(object):
 
   def _WarnUnimplemented(self, test_key):
     if test_key in self._Settings():
-      print 'Warning: Ignoring not yet implemented key "%s".' % test_key
+      print('Warning: Ignoring not yet implemented key "%s".' % test_key)
 
   def IsBinaryOutputFormat(self, configname):
     default = "binary" if self.isIOS else "xml"
@@ -906,7 +908,7 @@ class XcodeSettings(object):
         result = dict(self.xcode_settings[configname])
         first_pass = False
       else:
-        for key, value in self.xcode_settings[configname].iteritems():
+        for key, value in self.xcode_settings[configname].items():
           if key not in result:
             continue
           elif result[key] != value:
@@ -1017,8 +1019,8 @@ class XcodeSettings(object):
     unimpl = ['OTHER_CODE_SIGN_FLAGS']
     unimpl = set(unimpl) & set(self.xcode_settings[configname].keys())
     if unimpl:
-      print 'Warning: Some codesign keys not implemented, ignoring: %s' % (
-          ', '.join(sorted(unimpl)))
+      print('Warning: Some codesign keys not implemented, ignoring: %s' % (
+          ', '.join(sorted(unimpl))))
 
     return ['%s code-sign-bundle "%s" "%s" "%s"' % (
         os.path.join('${TARGET_BUILD_DIR}', 'gyp-mac-tool'), key,
@@ -1621,7 +1623,7 @@ def _TopologicallySortedEnvVarKeys(env):
     order = gyp.common.TopologicallySorted(env.keys(), GetEdges)
     order.reverse()
     return order
-  except gyp.common.CycleError, e:
+  except gyp.common.CycleError as e:
     raise GypError(
         'Xcode environment variables are cyclically dependent: ' + str(e.nodes))
 
@@ -1658,10 +1660,10 @@ def _HasIOSTarget(targets):
 def _AddIOSDeviceConfigurations(targets):
   """Clone all targets and append -iphoneos to the name. Configure these targets
   to build for iOS devices and use correct architectures for those builds."""
-  for target_dict in targets.itervalues():
+  for target_dict in targets.values():
     toolset = target_dict['toolset']
     configs = target_dict['configurations']
-    for config_name, config_dict in dict(configs).iteritems():
+    for config_name, config_dict in dict(configs).items():
       iphoneos_config_dict = copy.deepcopy(config_dict)
       configs[config_name + '-iphoneos'] = iphoneos_config_dict
       configs[config_name + '-iphonesimulator'] = config_dict