Improve tuple comparisons

I never noticed this before; but for the comparison
to be correct, we need to split the tuple before
doing the comparison

Author: iMichka

pygccxml/utils/utils.py

@@ -26,7 +26,7 @@ def is_str(string):
         bool: True or False
 
     """
-    if sys.version_info >= (3, 0):
+    if sys.version_info[:2] >= (3, 0):
         return isinstance(string, str)
 
     return isinstance(string, basestring)
@@ -48,7 +48,7 @@ def find_xml_generator(name="castxml"):
 
     """
 
-    if sys.version_info >= (3, 3):
+    if sys.version_info[:2] >= (3, 3):
         path = _find_xml_generator_for_python_greater_equals_33(name)
     else:
         path = _find_xml_generator_for_legacy_python(name)

unittests/example_tester_wrap.py

@@ -28,7 +28,7 @@
 sys.modules[__name__].__file__ = example_file
 
 # Run the example
-if sys.version_info >= (3, 0):
+if sys.version_info[:2] >= (3, 0):
     with open(example_file) as f:
         code = compile(f.read(), example_file, "exec")
         exec(code, None, None)

unittests/parser_test_case.py

@@ -104,7 +104,7 @@ def _test_calldef_exceptions(self, calldef, exceptions):
              pprint.pformat([delc.name for delc in exceptions_indeed])))
 
 
-if sys.version_info < (2, 7, 0):
+if sys.version_info[:3] < (2, 7, 0):
     # Python2.6 does not have the following methods in the unittest module
     parser_test_case_t.assertIn = \
         lambda parser, a1, a2, *args: parser.assertTrue(a1 in a2, args)

unittests/test_hash.py

@@ -25,7 +25,7 @@ def test_types_hashes(self):
 
         """
 
-        if sys.version_info[:2] <= (2,7):
+        if sys.version_info[:2] <= (2, 7):
             # _create_type_t_mockup calls inspect.signature, which does not
             # exist for legacy Python
             return