There are other checks:


Lib/distutils/command/build_ext.py:

# this keeps compatibility from 2.3 to 2.5
if sys.version < "2.6":
    USER_BASE = None
    HAS_USER_SITE = False
else:
    from site import USER_BASE
    HAS_USER_SITE = True



Lib/distutils/msvccompiler.py and Lib/distutils/msvc9compiler.py:

def get_build_version():
    """Return the version of MSVC that was used to build Python.

    For Python 2.3 and up, the version number is included in
    sys.version.  For earlier versions, assume the compiler is MSVC 6.
    """
    ...
    if i == -1:
        return 6


Lib/distutils/tests/test_build_ext.py:

class BuildExtTestCase(TempdirManager,
                       LoggingSilencer,
                       unittest.TestCase):
    def setUp(self):
        ...
        if sys.version > "2.6":
    ...
    def tearDown(self):
        ...
        if sys.version > "2.6":