小编Nge*_*tor的帖子

我有一张专辑照片核心数据模型.照片实体有一列用于保存在磁盘上的实际照片文件的路径.删除照片和相册的最佳做法是什么？在核心日期删除项目之前,是否必须手动删除磁盘上的文件？照片对象很容易.但是对于一张专辑,这些照片可能已被级联删除规则删除,现在需要逐个循环处理这些文件.

对我来说,最好的做法是什么？

(我决定不使用"允许外部存储"来解决其他问题)

如何在运行时在three.js 中添加和删除不同的灯光类型？

我有一些复选框，每个复选框都代表一种灯光类型，我想在选中复选框时向场景添加某种灯光类型，并在未选中时删除灯光。

我试过：scene.remove(light)and light.visible = false，但没有用。

<a href = "{% url 'ngraph' %}">Customer Count</a>

当我点击客户计数它只工作一次并使其工作我必须再次运行程序,这里有什么问题？我注意到的是,一旦链接localhost:8000/graph是(客户计数)点击,工作但忙于localhost:8000并且不起作用.怎么解决？

views.py

def graph(request):
    age = ['below 20', '20-22','22-24','24-26','26-28','28-30','30-40','above 40']
    avg_call_group =  [0, 0, 0, 0, 0, 0, 0, 0]

    cursor = connection.cursor()
    cursor.execute("select p.age_group,sum(c.avg_duration) as age_avg_dur from demo p,(select  card_no as card_n, avg(duration) as avg_duration from call_details where service_key = 1 and card_no =calling_no group by card_no) as c where p.card_no = c.card_n group by p.age_group ")
    numrows = int(cursor.rowcount)
    for x in range(numrows):
        row = cursor.fetchone()
        avg_call_group[x] =  row[1]

    cursor.close() …

Django==1.7
flup==1.0.2
python==2.6
stevedore==0.15
virtualenv==1.11.6
virtualenv-clone==0.2.5
virtualenvwrapper==4.3.1 

我尝试运行,django-admin.py但我不断得到这个bizzare语法错误,所有在全新安装的django ..

File "/home/ibusdep1/.virtualenvs/ibus/bin/django-admin.py", line 2, in <module>
  from django.core import management
File "/home/ibusdep1/.virtualenvs/ibus/lib/python2.6/site-packages/django/core/management/__init__.py", line 68
  commands = {name: 'django.core' for name in find_commands(__path__[0])}
                                      ^
SyntaxError: invalid syntax

Django安装在/.virtualenv/(projectname)/lib/python2.6/site-packages/Django我的$ PYTHONPATH中.

什么可能抛出这种语法错误？

我尝试使用 terraform 在 AWS 上创建 RDS 实例，并收到以下错误

这段代码可以吗？

resource "aws_vpc" "main" {
  cidr_block = "10.0.0.0/16"
}


resource "aws_subnet" "private-subnet1" {
  vpc_id = "${aws_vpc.main.id}"
  cidr_block = "10.0.1.0/24"
}

resource "aws_subnet" "private-subnet2" {
  vpc_id = "${aws_vpc.main.id}"
  cidr_block = "10.0.2.0/24"
}

resource "aws_db_subnet_group" "db-subnet" {
  name       = "DB subnet group"
  subnet_ids = ["${aws_subnet.private-subnet1.id}", "${aws_subnet.private-subnet2.id}"]
}


resource "aws_db_instance" "db" {
  allocated_storage    = "20"
  storage_type         = "gp2"
  engine               = "mysql"
  engine_version       = "5.7.22"
  instance_class       = "db.t2.micro"
  name                 = "mydb"
  username             = "admin"
  password             = "admin" …