TypeError：'str'对象不可调用python3答案

【问题标题】：TypeError: 'str' object is not callable python3TypeError：'str'对象不可调用python3
【发布时间】：2018-07-16 12:52:12
【问题描述】：

def SaveRoles(request):
    if 'user_name' in request.session:
        if request.method == "POST":
            user_roles = request.POST['user_roles']
            user_permission_level = request.POST['user_permission_level']
            user_role_code = request.POST['user_role_code']
            code = user_roles(user_roles=user_roles, user_permission_level=user_permission_level, user_role_code=user_role_code)
            print("qqqqqq", code)
            try:
                model_status = code.save()
            except Exception as e:
                print("exception occured", e)
                return render(request, 'administrator/add_role.html', {'message': 'Oops some error occured'})
        if model_status == None:
            role = user_roles.objects.all()

            return HttpResponseRedirect('http://'+request.get_host()+'/admin/role-list/',{'message': 'Role added successfully','code': code})
        else:
            return HttpResponseRedirect('http://'+request.get_host()+'/admin/role-list/')
    else:
        return HttpResponseRedirect('/admin/')

当我运行这个函数时，我得到了

TypeError: 'str' 对象不可调用

我搜索了我所有的代码，但我什至没有在我的项目中的任何地方使用 str 这个词但我无法弄清楚错误

【问题讨论】：

user_roles 是一个字符串。 user_roles = request.POST['user_roles']

标签： django python-3.x

【解决方案1】：

user_roles 是一个字符串，因为您正在分配 request.POST['user_roles'] 的值。你可能需要改变。

user_roles = request.POST['user_roles']

到

user_roles_val = request.POST['user_roles']

例如：

def SaveRoles(request):
    if 'user_name' in request.session:
        if request.method == "POST":
            user_roles_val = request.POST['user_roles']    #Update
            user_permission_level = request.POST['user_permission_level']
            user_role_code = request.POST['user_role_code']
            code = user_roles(user_roles=user_roles_val, user_permission_level=user_permission_level, user_role_code=user_role_code)   #Update
            print("qqqqqq", code)
            try:
                model_status = code.save()
            except Exception as e:
                print("exception occured", e)
                return render(request, 'administrator/add_role.html', {'message': 'Oops some error occured'})
        if model_status == None:
            role = user_roles.objects.all()

            return HttpResponseRedirect('http://'+request.get_host()+'/admin/role-list/',{'message': 'Role added successfully','code': code})
        else:
            return HttpResponseRedirect('http://'+request.get_host()+'/admin/role-list/')
    else:
        return HttpResponseRedirect('/admin/')

【讨论】：