Django怎么生成页面内容为txt

现在页面有一些表单，填写内容后希望提交，跟着页面原来的内容，生成一个新的html或者txt返回给用户
views。py里面应该怎么写
#coding： gb2312
from django.http import HttpResponse
import datetime,calendar
import time
from django.http import HttpResponse
from django.template import Context
from django.template.loader import get_template
from django.http import HttpResponse, Http404
from django.contrib.auth.models import User
from django.shortcuts import render_to_response
from django.http import HttpResponseRedirect
from django.contrib.auth import logout
from django.template import RequestContext
#from django import form

from django.shortcuts import render 
from .forms import ContactForm 
#from django.shortcuts import render_to_response
#from django_manage_app.forms import ContactForm

def current_datetime(request):
    now = time.strftime('%Y-%m-%d-%H-%M-%S',time.localtime(time.time()))
    html = '<html><body>It is now %s.</body></html>' %now
    return HttpResponse(html)

def contact_author(request):
    if request.method == 'POST':#提交请求时才会访问这一段，首次访问页面时不会执行
        form = ContactForm(request.POST)
        if form.is_valid():#说明各个字段的输入值都符合要求
            cd = form.cleaned_data#只有各个字段都符合要求时才有对应的cleaned_data
            #print (form.cleaned_data())
            print (cd['subject'])
            print (cd['email'])
            print (cd['message'])
            return HttpResponseRedirect('/thanks/')
        else:#有部分字段不符合要求，会有error相关信息给加到form中去，需要覆盖掉
            #print (form)
            print ('The data does not meet the requirements')
            print (form['subject'].errors)
            print (form['email'].errors)
            print (form['message'].errors)
    else:#首次访问该url时没有post任何表单
        form = ContactForm()#第一次生成的form里面内容的格式
        print (form)
        print (form.is_valid())

    #“首次访问”和“提交的信息不符合要求”时被调用
    return render_to_response('contact_author.html', {'form': form})


def thanks(request):

    return render_to_response('thanks.html')


def download_file(request):   
    #from django.http import HttpResponse          
    ## CSV  
    #import csv      
    #response = HttpResponse(mimetype='text/csv')  
    #response['Content-Disposition'] = 'attachment; filename=my.csv'  
    #writer = csv.writer(response)  
    #writer.writerow(['First row', 'Foo', 'Bar', 'Baz'])  
    #writer.writerow(['Second row', 'A', 'B', 'C', '"Testing"', "Here's a quote"])

    # Text file  
    #response = HttpResponse()                                   
    #response['Content-Disposition'] = 'attachment; filename=my.txt'                
    #response.write("aa/n")  
    #response.write("bb")

    # PDF file   
    #http://code.djangoproject.com/svn/django/branches/0.95-bugfixes/docs/outputting_pdf.txt  
    #from reportlab.pdfgen import canvas  #need pip ind
    #response = HttpResponse()#)mimetype='application/pdf')  
    #response['Content-Disposition'] = 'attachment; filename=somefilename.pdf'  
    #p = canvas.Canvas(response)  
    #p.drawString(100, 100, "Hello world.")  
    #p.showPage()  
    #p.save()  
    fout=open("test.txt","wt") 
    print >>fout,"hello world"
    fout.close()     
    response['Content-Disposition'] = 'attachment; filename=test.txt' 
    


    
return HttpResponse(response)