sitecustomize file

except ImportError:
    # Python 3
    import builtins
    basestring = (str,)
    def execfile(filename, namespace):
        # Open a source file correctly, whatever its encoding is
        with open(filename, ‘rb’) as f:
            exec(compile(f.read(), filename, ‘exec’), namespace)

What is the error in the line shown in blue --sitecustomize.py