Pastable version of Django models search

<pre class='prettyprint' language='python'>class SearchLet(Form):
    district = Field(widget=SelectMultiple(choices=DISTRICTS, required=False)
    min_price = IntegerField(widget=TextInput(required=False)
    max_price = IntegerField(widget=TextInput(required=False)
    
    #def clean_district...

def search_let(request):
    
    if request.method == &quot;POST&quot;:
        form = SearchLet(request.POST)
        
        if form.is_valid():
            
            #bind data to dict keys  
            qparams = dict(
                        district = form.cleaned_data[&quot;district&quot;], 
                        min_price = form.cleaned_data[&quot;min_price&quot;], 
                        max_price = form.cleaned_data[&quot;max_price&quot;],
                        )

#keep list Q
            qsets = dict(
                     district = Q(property__district__in = qparams[&quot;district&quot;]), 
                     min_price = Q(property__houselet__rent_price__gte = qparams[&quot;min_price&quot;]),
                     max_price = Q(property__houselet__rent_price__lte = qparams[&quot;max_price&quot;])
                     )
              
            #filter out the Q that have None values
            final_query = [qsets[k] for k in qsets if qparams[k] is not None]

custom_search_results = Ad.objects.select_related().filter(*final_query)
            
            context = dict(form=form, custom_search_results=custom_search_results)

else:
            pass #handle invalid form
    else:
        pass #handle GET

return render_to_response(&quot;search_house_let.html&quot;, context)</pre>
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Pastable version of Django models search