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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 _box_in_box(el, child):

 """ Return True if child is contained within el. """

    return all([
        float(el.get('x0')) <= float(child.get('x0')),
        float(el.get('x1')) >= float(child.get('x1')),
        float(el.get('y0')) <= float(child.get('y0')),
        float(el.get('y1')) >= float(child.get('y1')),
    ])