-versionpath = join(abspath(dirname(__file__)), "ppu", "__version__.py")
-ppu_version = load_source("ppu_version", versionpath)
+versionpath = join(abspath(dirname(__file__)), 'ppu', '__version__.py')
+ppu_version = {}
+
+if sys.version_info[:2] == (2, 7):
+ execfile(versionpath, ppu_version) # noqa: F821 'execfile' Py3
+
+elif sys.version_info >= (3, 4):
+ exec(open(versionpath, 'rU').read(), ppu_version)
+
+else:
+ raise ImportError("ppu requires Python 2.7 or 3.4+")