代码：
def login(request):
if request.POST:
username = request.POST.get('username')
password = request.POST.get('password')
user = auth.authenticate(username=username, password=password)
if user is not None and user.is_active():
auth.login(request, user)
request.session['user'] = username
response = HttpResponseRedirect('/home/')
return response
else:
return render(request, 'login.html', {'error': 'username or password error'})
return render(request, 'login.html')
运行结果：
问题原因：
is_active 非方法，而是一个属性，通常是指对象是否激活、启用、可用、正常状态。将代码中is_active()中的括号去掉
