在利用pycharm安装scrapy包是遇到了挺多的问题.在折腾了差不多折腾了两个小时之后总算是安装好了.期间各种谷歌和百度,发现所有的教程都是利用命令行窗口安装的.发现安装scrapy需要的包真是多的要死啊.没有专门针对pycharm安装的.因此这里将自己的安装经验分享一下,希望能帮助一些pythoner少走一些弯路(废话到此为止,下面正题..) 首先呢,你肯定要安装好了pycharm了,然后就是利用伟大的pycharm的自动查找安装第三方包,pycharm可以帮你找到大多数的第三方包,不需要

我的maven 项目有一个红色感叹号, 而且Problems 存在 errors : Description Resource Path Location Type Archive for required library: 'D:/mvn/repos/junit/junit/3.8.1/junit-3.8.1.jar' in project 'xxx' cannot be read or is not a valid ZIP file ktb-mgr Maven Webapp Build pa

required,这是HTML5中的一个新属性:这是HTML5中input元素中的一个属性. required译为必须的,在input元素中应用这一属性,就表示这一input元素节点是必填的或者必选的. 用法就是在设计表单时,指定某些选项为必填项(required),只有当用户填写了该选项后,用户才能够提交表单. 栗子: <form action="/backstage">  <input type="text" placeholder="

看到了http://stackoverflow.com/questions/5547162/eclipse-error-indirectly-referenced-from-required-class-files , 也没搞明白. 后面被证明, 实际上还是Unresolved compilation problems [ERROR] [09-30 11:04:19] org.springframework.web.context.ContextLoader - Context initiali

今日在写GenericDao时,发现了一个异常,内容如下: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'genericDao' defined in class path resource [spring.common.xml]: Invocation of init method failed; nested exception is java.lang.Ille

原文链接:http://rxxluowei.iteye.com/blog/671893 今天写第一次写JavaFX的入门程序就GG 遇到了导入API的问题,无奈疯狂地通过网络找解决方案.. 我的问题是: 导入import javafx.application.Application;时 出现这个错误提示 Access restriction: The type 'Application' is not API (restriction on required library 'C:\Progra

input 里面增加这样的语句: <input type="text" placeholder="您的姓名" required oninvalid="setCustomValidity('请输入您的姓名');" oninput="setCustomValidity('');" />

HTTP Status 400 - Required String parameter 'userName' is not present 错误 先mark  有时间详细写 参考链接: https://yq.aliyun.com/articles/29107

真机测试的时候弹出这样的提示:The certificate used to sign ***has either expired or has been revoked. An updated certificate is required to sign and install the application.... 想了想自己清理过本地的证书,于是参照 stackoverflow 上的方法试了下,果然好了.具体流程如下: Shift(⇧) + Command(⌘) + K 或者 Produ

java.lang.IllegalArgumentException: 'sessionFactory' or 'hibernateTemplate' is required 严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListenerorg.springframework.beans.facto

Required attribute can be applied to a property of a domain class. EF Code-First will create a NOT NULL column in a database table for a property on which we apply Required attribute. Note that it can also be used with ASP.Net MVC as a validation att

public override void Init() { //在注册管道事件中 require session state //只能在引发“HttpApplication.AcquireRequestState”之前调用“HttpContext.SetSessionStateBehavior”. this.BeginRequest += (sender, e) => HttpContext.Current.SetSessionStateBehavior(SessionStateBehavior

最近遇到一起关于"I/O is frozen on database xxx. No user action is required. However, if I/O is not resumed promptly, you could cancel the backup."的案例. 出现问题的时候,我去执行一个非常简单的SQL语句,执行时间非常长,检查没有阻塞.正常情况下,应该是几秒就OK.后面检查错误日志,发现有大量这类消息.而这个点,我们没有备份数据库的作业.后面搜索,了解了一下

@RequestParam jQuery调用方式: deleteFile: function(filePath) { return ajax({ method: 'POST', url: '/cm/soft/package/package/deleteFile', data: { fileDir: filePath } }); }, 后台java controller形式 public BaseResultVO deleteFile(@RequestParam("fileDir") S

Intel HAXM is required to run this AVD,VT-x is disabled in BIOS;Enable VT-x in your BIOS security settings (refer to documentation for your computer) . 意思是让进入你的BIOS系统中将BIOS中的VT-x 给开启了. 解决方案:重启电脑.按F10 (惠普电脑) 然后进入到BIOS中. 选择 系统设置 -> 处理器虚拟化技术 将这个选项开启 .

安装第三方库出现 Python version 2.7 required, which was not found in the registry 建立一个文件 register.py 内容如下. 然后执行该脚本. import sys from _winreg import * # tweak as necessary version = sys.version[:3] installpath = sys.prefix regpath = "SOFTWARE\\Python\\Pythonco

在Eclipse中编写Java代码时,用到了BASE64Decoder,import sun.misc.BASE64Decoder;可是Eclipse提示:Access restriction : The type BASE64Decoder is not accessible due to restriction on required library C:\Programfiles\java\jre6\lib\rt.jarAccess restriction : The constructo

由于我安装Python64位的,下载后没注册,安装Twisted时老提示“python version 2.7 required,which was not found in the registry”错误 解决方法 1.任意位置存放reg.py文件 # # script to register Python 2.0 or later for use with win32all # and other extensions that require Python registry setting

The type * is not accessible due to restriction on required library”的错误, 意思是所需要的类库由于受限制无法访问. 解决办法: 1.选中项目->右键->进入Properties视图,选中Java Build Path->点击Libraries->展开JRE System Library[JavaSE-1.6],选中Access rules这一项.如图: 2.Edit->点击Add->在Rule Pat

WCF Proxy Authentication Required The Problem When I’m in the office, I have to use an authenticated proxy to get outside our intranet and to the internet. When I called a service that resides on the web, I got the 407 error. How can we fix this with

1.错误描述:今天在起归档的时候报一下错误: SQL> alter database archivelog; alter database archivelog * ERROR at line : ORA: instance recovery required, cannot set ARCHIVELOG mode 2.从错误上看到是由于三大文件(datafile,controlfile,logfile)的scn不一致导致,造成scn不一致的原因是我们用了shutdown abort(shutd