Python 3 compatibility

test/variables/commands/commands.gyp

 # Copyright (c) 2009 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.
 
 # This is a simple test file to make sure that variable substitution
 # happens correctly.  Run "run_tests.py" using python to generate the
 # output from this gyp file.
 
 {
   'variables': {
-    'pi': 'import math; print math.pi',
+    'pi': 'import math; print(math.pi)',

[Nico, 2016/07/29 22:22:06]

hmm doesn't this need an `from __future__ import print_function` too when
running gyp under python 2.7?

[AWhetter, 2016/11/05 23:59:50]

Nope. Using brackets is optional in Python 2.7.
test
test
Hello world
('Hello', 'world')

     'third_letters': "<(other_letters)HIJK",
     'letters_list': 'ABCD',
     'other_letters': '<(letters_list)EFG',
     'check_included': '<(included_variable)',
     'check_lists': [
       '<(included_variable)',
       '<(third_letters)',
     ],
     'check_int': 5,
     'check_str_int': '6',
@@ skipping 12 matching lines @@
   },
   'includes': [
     'commands.gypi',
   ],
   'targets': [
     {
       'target_name': 'foo',
       'type': 'none',
       'variables': {
         'var1': '<!(["python", "-c", "<(pi)"])',
-        'var2': '<!(python -c "print \'<!(python -c "<(pi)") <(letters_list)\'")',
-        'var3': '<!(python -c "print \'<(letters_list)\'")',
-        'var4': '<(<!(python -c "print \'letters_list\'"))',
+        'var2': '<!(python -c "print(\'<!(python -c "<(pi)") <(letters_list)\')")',
+        'var3': '<!(python -c "print(\'<(letters_list)\')")',
+        'var4': '<(<!(python -c "print(\'letters_list\')"))',
         'var5': 'letters_',
         'var6': 'list',
         'var7': '<(check_int)',
         'var8': '<(check_int)blah',
         'var9': '<(check_str_int)',
         'var10': '<(check_list_int)',
         'var11': ['<@(check_list_int)'],
         'var12': '<(not_int_1)',
         'var13': '<(not_int_2)',
         'var14': '<(not_int_3)',
@@ skipping 25 matching lines @@
           'action': [
             'echo',
             '<(_inputs)',
             '<(_outputs)',
           ],
         },
       ],
     },
   ],
 }