I write the below code:

import csv
def importcsv(request):
     if request.method == "POST":
        form = DataInput(request.POST, request.FILES)
        if form.is_valid():
            form.save()
            return HttpResponseRedirect('Url/')
     else:
        form = DataInput()
        context = {"form": form}
        return render_to_response("imported.html", context,context_instance=RequestContext(request))

And in created import.html file having form with

<form enctype="multipart/form-data" action="" method="post" id="importform">

I wrote and use the below code:

import csv
def importcsv(request):
     if request.method == "POST":
        form = DataInput(request.POST, request.FILES)
        if form.is_valid():
            form.save()
            return HttpResponseRedirect('Url/')
     else:
        form = DataInput()
        context = {"form": form}
        return render_to_response("imported.html", context,context_instance=RequestContext(request))

And in created import.html file having form with

<form enctype="multipart/form-data" action="" method="post" id="importform">