小编the*_*arl的帖子

我的webpack.config.js

var path = require("path")
var webpack = require('webpack')
var BundleTracker = require('webpack-bundle-tracker')

module.exports = {
    context: __dirname,

    entry: [
        'webpack-dev-server/client?http://localhost:3000',
        'webpack/hot/only-dev-server',
        './assets/js/index', // entry point of our app. assets/js/index.js should require other js modules and dependencies it needs
    ],

    output: {
        path: path.resolve('./assets/bundles/'),
        filename: "[name]-[hash].js",
        publicPath: 'http://localhost:3000/assets/bundles/', // Tell django to use this URL to load packages and not use STATIC_URL + bundle_name
    },

    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin(), // don't reload if there is an error
        new …

我正在使用django 1.7作为我的应用程序.我遇到了一些迁移问题.每当我尝试更改外键模型中的字段名称时,它就会中断.唯一的解决方法是去到数据库,并修复它,它们运行migrate之后syncdb.当我的应用程序变得更大时,我如何解决这些问题,并且随着我的架构更改,我将很快花费更多时间来解决数据库错误.django 1.7不支持South并且有自己的迁移功能并不强大？(我不确定,只是初学者)

当我使用 4 个文件时，所有文件都在选项卡（VIM）中打开。我想保存更改并编译它而不必关闭选项卡，即我想在新选项卡中打开一个终端以及现有的 4?

我应该如何在 VIM 中做到这一点？

我无法从PyCharm中访问Python文档.我试过了View | Quick Documentation,它说No Documentation Found.有没有简单的方法我可以配置它来显示文档？

为了澄清,我正在寻找Python文档,即内置库的功能/特性的描述,而不是有关PyCharm本身的文档.

无法让一个简单的你好世界工作!

server.js

var webpack = require('webpack')
var WebpackDevServer = require('webpack-dev-server')
var config = require('./webpack.config')

new WebpackDevServer(webpack(config), {
  publicPath: config.output.publicPath,
  hot: true,
  inline: true,
  historyApiFallback: true
}).listen(3000, '0.0.0.0', function (err, result) {
  if (err) {
    console.log(err)
  }

  console.log('Listening at 0.0.0.0:3000')
})

webpack.config.js

var path = require("path")
var webpack = require('webpack')
var BundleTracker = require('webpack-bundle-tracker')

module.exports = {
    context: __dirname,

    entry: [
        './assets/js/index', // entry point of our app. assets/js/index.js should require other js modules and dependencies it needs
        'webpack-dev-server/client?http://localhost:3000',
        'webpack/hot/only-dev-server',

    ], …

我需要从多个表中获取列,我该如何实现？

UserLog


+------------+----------+------+-----+---------+----------------+
| Field      | Type     | Null | Key | Default | Extra          |
+------------+----------+------+-----+---------+----------------+
| log_id     | int(11)  | NO   | PRI | NULL    | auto_increment |
| time       | datetime | NO   |     | NULL    |                |
| ip_address | char(15) | YES  |     | NULL    |                |
| event_id   | int(11)  | NO   | MUL | NULL    |                |
| user_id    | int(11)  | NO   | MUL | NULL    |                |
+------------+----------+------+-----+---------+----------------+

Events


+-------------+--------------+------+-----+---------+----------------+
| …

与Java不同,在python中将模块导入另一个模块并调用模块的方法时,为什么主体中的代码会被执行而不是只执行方法中的代码？

示例(取自另一个SO问题):

提交one.py

def func():
    print("func() in one.py")

print("top-level in one.py")

if __name__ == "__main__":
    print("one.py is being run directly")
else:
    print("one.py is being imported into another module")

文件two.py

import one

print("top-level in two.py")
one.func()

if __name__ == "__main__":
    print("two.py is being run directly")
else:
    print("two.py is being imported into another module")

当我运行这个:

python two.py

我明白了:

top-level in one.py
one.py is being imported into another module
top-level in two.py
func() in one.py
two.py is being run directly

如果我只想要执行的func()方法, …

我正在从数据库中检索数据并将其发送到json到前端.现在时间在UTC中存储为数据库,所以我想在将数据发送到前端之前更改时区及其格式.改变/转换前端的时间不是一种选择.

我该怎么办？

注意:我可以在模板中转换为适当的时区和格式.但是我现在想在视图中这样做.

def fetchinfo(request): uid = int(request.user.id) data = UserLog.objects.filter(user_id=uid).values('event_id__description','time','ip_address') return JsonResponse({'status':'success','data':list(data),})

延迟语句推迟执行函数,直到周围的函数返回.但是,如果我尝试打印执行以下功能所花费的时间,它总是打印0.

func sum() {
    start := time.Now()

    //expecting to print non zero value but always gets 0
    defer fmt.Println(time.Now().Sub(start))

    sum := 0
    for i := 1; i < 101; i++ {
        sum += i
    }
    time.Sleep(1 * time.Second)
    fmt.Println(sum)
}

代码:https://play.golang.org/p/46dxtS5beET