request.GET [＆＃39; q＆＃39;]，request.GET（＆＃39; q＆＃39;）和request.GET（＆＃39; q＆＃39;，）之间有什么区别？

Question

request.GET [＆＃39; q＆＃39;]，request.GET（＆＃39; q＆＃39;）和request.GET（＆＃39; q＆＃39;，有什么区别？ ）.Thanks

def search(request):
    if 'q' in request.GET and request.GET['q']:
        q=request.GET['q']
        books=Book.objects.filter(title__icontains=q)
        return render(request,'search_results.html',{'book':books,'query':q})
    else:
        return HttpResponse('please submit a search term')

Answer 1

if 'q' in request.GET and request.GET['q']它只检查包含q密钥的字典。但它看起来很难看。你可以做更多pythonic：

q = request.GET.get('q') # returns None if q not in GET
if q:
    do your logic