小编Muh*_*aqi的帖子

我正在使用virtualenv处理Django项目并将其连接到本地postgres数据库.当我运行项目时说,

ImportError: No module named psycopg2.extensions

然后我用这个命令安装

pip install psycopg2

然后在安装过程中出现以下错误.

Downloading/unpacking psycopg2==2.4.4
  Downloading psycopg2-2.4.4.tar.gz (648kB): 648kB downloaded
  Running setup.py (path:/home/muhammadtaqi/Projects/MyProjects/OnlineElectionCampaign/venv/build/psycopg2/setup.py) egg_info for package psycopg2

    Error: You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.

    Complete output from command python setup.py egg_info:
    running egg_info

creating pip-egg-info/psycopg2.egg-info

writing pip-egg-info/psycopg2.egg-info/PKG-INFO

writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt

writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt

writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'

warning: manifest_maker: standard file '-c' not found



Error: You need to …

我有项目组列表

<div id="MainMenu">
    <div class="list-group panel">
        <a href="#why" class="list-group-item" data-toggle="collapse" data-parent="#MainMenu">Menu 1</a>
        <div class="collapse" id="why">
            <a href="" class="list-group-item" data-toggle="collapse" data-parent="#SubMenu1">Menu 1 a</a>
            <a href="" class="list-group-item">Menu 1 b</a>
            <a href="" class="list-group-item">Menu 1 c</a>
            <a href="" class="list-group-item">Menu 1 d</a>
            <a href="" class="list-group-item">Menu 1 e</a>
            <a href="" class="list-group-item">Menu 1 f</a>
        </div>
        <a href="#joinus" class="list-group-item" data-toggle="collapse" data-parent="#MainMenu">Menu 2</a>
        <div class="collapse" id="joinus">
            <a href="" class="list-group-item">Menu 2 a</a>
            <a href="" class="list-group-item">Menu 2 b</a>
            <a href="" class="list-group-item">Menu 2 c</a>
            <a href="" class="list-group-item">Menu 2 d</a>
            <a href="" class="list-group-item">Menu …

我在表格中有以下数据:

+----------------------+----------------------------------------------------------+--------------+
| subscriber_fields_id | name                                                     | field_type   |
+----------------------+----------------------------------------------------------+--------------+
|                  143 | Peshawar/Islamabad/Lahore/Swat/Mardan/Karachi            | Job Location |
|                  146 | Karachi                                                  | Job Location |
|                  147 | Lahore and Karachi                                       | Job Location |
|                  149 | Karachi, Mirpur Khas, Sukkur, Layyah, Gilgit, Charsaddah | Job Location |
|                  152 | Islamabad or Lahore                                      | Job Location |
|                  155 | Islamabad                                                | Job Location |
|                  157 | 7 Districts of Sindh and Karachi                         | Job Location …

我是Python编程的新手,刚刚开始使用Django,我有一个小任务就是使用构建一个bootstrap博客.我在django中完成了jinja模板的一些工作.但我想知道如何在django中使用bootstrap 3,因为django模板可以像块语句和继承那样使用jinja样式.

很多困惑,这里任何一个做过这种工作的人,请帮忙.还谷歌它,并发现了很多库,但结构让我困惑,请记住,我在初学者水平.

我有下面的 sql 查询运行良好，

SELECT completed_by, count(*) AS Total
FROM tasks
WHERE completed_by is not null AND status = 1
GROUP BY completed_by
;

他们正在使用学说查询构建器来执行此操作，但无法返回错误。

$parameters = array(
                    'status' => 1,
                );

$qb = $repository->createQueryBuilder('log');
$query = $qb
->select(' log.completedBy, COUNT(log) AS Total')
->where('log.Status = :status')
->groupBy('log.completedBy')
->setParameters($parameters)
->getQuery();

并低于错误；

[语义错误] 第 0 行，第 21 列“completedBy”附近：错误：无效的 PathExpression。必须是 StateFieldPathExpression。

大家好，我正在使用由 Ansible 和提供商 Oracle virtualbox 配置的 Vagrant box，它对我来说工作得很好。但有一天我安装了 Android Studio，它是模拟器和带有 KVM 的 Minicube。

之后 vagrant with virtual-box 就停止工作了。现在，每当我运行时，vagrant up我都会遇到以下错误。

Bringing machine 'default' up with 'virtualbox' provider...
==> default: Checking if box 'ubuntu/bionic64' version '20200416.0.0' is up to date...
==> default: Clearing any previously set forwarded ports...
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
==> default: Forwarding ports...
    default: 22 (guest) => 2222 (host) (adapter 1) …

我正在使用Postgres SQL数据库进行Django项目。我编写了一个可以在Postgres上完美运行的存储过程。

现在，我想从Django 1.5中调用该存储过程。我已经编写了代码，但提示错误。

CREATE FUNCTION fn_save_message3(IN msg_sub character varying, IN msg_cont text, IN msg_type character varying, IN msg_category character varying, IN msg_created_by character varying, IN msg_updated_by character varying) RETURNS integer AS
$BODY$ DECLARE msg_id integer := 0;
BEGIN
    INSERT INTO tbl_messages
        (message_subject, message_content, message_type, message_category, 
       created_on, created_by, updated_on, updated_by)
    VALUES 
      (msg_sub, msg_cont, msg_type, msg_category, LOCALTIMESTAMP, 
       msg_created_by, LOCALTIMESTAMP, msg_updated_by);
      Select into msg_id currval('tbl_messages_message_id_seq');
  return msg_id;
END;$BODY$
LANGUAGE plpgsql VOLATILE NOT LEAKPROOF
COST 100;
ALTER FUNCTION public.fn_save_message(IN character varying, IN text, …

我已经开始用 django 构建我的第一个应用程序教程，我必须在某些特殊场合向存储在数据库表中的所有用户发送电子邮件。我在谷歌上搜索过，发现了很多 api，但发现很难用我的应用程序进行配置。

这是我的model.py

class Users(models.Model):
    UserID = models.IntegerField(verbose_name='User ID',max_length=255,primary_key=True)
    UserName = models.CharField(verbose_name='User Name',max_length=254,null=True,blank=True)
    Email = models.EmailField(verbose_name='Email',max_length=254,null=True,blank=True)
    Phone = models.CharField(verbose_name='Phone Number',max_length=254,null=True,blank=True)

我想在这里有一个功能，它应该让所有用户一一获取并发送电子邮件，还可以告诉电子邮件是否已发送的状态天气。

我有这个数据集，

new_df = pd.DataFrame( { 
    "Country" : ["C1", "C2", "C1", "C3", "C1", "C3", "C1"],
    "City" : ["ISB", "KHR", "LAH", "DUB", "RWP", "RWP", "RWP"],
    "Sales" : [10, 25, 40, 20, 45 , 43,10]  } )

我这样做了；

grouped_new_df = new_df.groupby(['Country', 'City'])
new_new_df = grouped_new_df.agg({'Sales': {'Mean': np.mean, 'Sum':np.sum}})

new_new_df.index
MultiIndex(levels=[['C1', 'C2', 'C3'], ['DUB', 'ISB', 'KHR', 'LAH', 'RWP']],
           labels=[[0, 0, 0, 1, 2, 2], [1, 3, 4, 2, 0, 4]],
           names=['Country', 'City'])

在这里我不明白这些标签labels=[[0, 0, 0, 1, 2, 2], [1, 3, 4, 2, 0, …