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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_norm(func):
 """Wrap ``func`` to handle custom gwpy keywords for a LogNorm colouring """

    @wraps(func)
    def decorated_func(*args, **kwargs):
        norm, kwargs = format_norm(kwargs)
        kwargs['norm'] = norm
        return func(*args, **kwargs)
    return decorated_func