Django TypeError at /login/ 'bool' object is not callable

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