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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def log_cef(name, severity=logging.INFO, env=None, username='none', signature=None, **kwargs):
 """ Wraps cef logging function so we don't need to pass in the config dictionary every time. See bug 707060. ``env`` can be either a request object or just the request.META dictionary. """


    cef_logger = commonware.log.getLogger('cef')

    c = {'product': settings.CEF_PRODUCT,
         'vendor': settings.CEF_VENDOR,
         'version': settings.CEF_VERSION,
         'device_version': settings.CEF_DEVICE_VERSION}

    # The CEF library looks for some things in the env object like
    # REQUEST_METHOD and any REMOTE_ADDR stuff.  Django not only doesn't send
    # half the stuff you'd expect, but it specifically doesn't implement
    # readline on its FakePayload object so these things fail.  I have no idea
    # if that's outdated code in Django or not, but andym made this
    # <strike>awesome</strike> less crappy so the tests will actually pass.
    # In theory, the last part of this if() will never be hit except in the
    # test runner.  Good luck with that.
    if isinstance(env, HttpRequest):
        r = env.META.copy()
    elif isinstance(env, dict):
        r = env
    else:
        r = {}

    # Drop kwargs into CEF config array, then log.
    c['environ'] = r
    c.update({
        'username': username,
        'signature': signature,
        'data': kwargs,
    })

    cef_logger.log(severity, name, c)