Как получить 2 гет параметра?

<form class="form" action =" {% url 'search' %}" >
                    <div class="input-group">
                        <input class="form-control border-right-0 border " type="search" placeholder="Искать товары", name="search">
                        <span class="input-group-append">
                            <div class="input-group-text bg-transparent p-0">
                            </div>
                            <button class="btn btn-outline-success " type="submit"><i class="fa fa-search"></i></button>
                        </span>
                    </div>
                </form>

<form class="form for_change_items" method="get" name ="a" > 
                                                                 
                                        <div class="form-check p-0  " >


                                            <input class="form-check-input"  type="radio" onClick="a.submit()"  name="model_or_item"  id="model" value="model">
                                            <input class="form-check-input"  type="radio" onClick="a.submit()"  name="model_or_item" id="item" value="item" >

                                            <a class= "gray_text">{{items.count }} товар (-а, -ов)</a>

                                            <input class="form-check-input" type="radio" name="change_items" onClick="a.submit()" checked id="2_items" value="2_items" >
                                            <input class="form-check-input" type="radio" name="change_items" onClick="a.submit()"  id="many_items" value="many_items">
                                            <label  {% if model_or_item == 'item' %} style="  opacity:0.7;" {% endif %} class="form-check-label font-weight-bolder" for="model">
                                                <a  {% if model_or_item == 'model' %} style=" text-decoration: underline;" {% endif %}>Модель</a>
                                            </label>
                                            <label  {% if model_or_item == 'model' %} style=" opacity:0.7;" {% endif %} class="form-check-label font-weight-bolder " for="item">
                                                <a  {% if model_or_item == 'item' %} style=" text-decoration: underline;" {% endif %}>Изделие</a>
                                            </label> 
                                            
                                        </div>
                                        
                                    </form>

search = request.GET.get('search')
change_items = request.GET.get('change_items', '2_items')
model_or_item = request.GET.get('model_or_item', 'model')
items = Item.objects.filter(title__icontains = search)