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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 get_report(session, vehicle_index):
 """Get vehicle health report summary."""

    vhr = get_vehicle_health_report(session, vehicle_index)
    if 'reportCard' not in vhr:
        raise MoparError("no vhr found")
    return _traverse_report(vhr['reportCard'])