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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 mobilized(normal_fn):
 """ Replace a view function with a normal and mobile view. For example:: def view():
 @mobilized(view) def view():
 The second function is the mobile version of view. The original function is overwritten, and the decorator will choose the correct function based on ``request.MOBILE``. """

    def decorator(mobile_fn):
        @functools.wraps(mobile_fn)
        def wrapper(*args, **kwargs):
            ctx = stack.top
            if ctx is not None and hasattr(ctx, 'request'):
                request = ctx.request
                if not request.MOBILE:
                    return normal_fn(*args, **kwargs)
            return mobile_fn(*args, **kwargs)
        return wrapper
    return decorator