packages | 易学教程

Why should we place interfaces with classes that use them rather than those that implement them?

阅读更多关于 Why should we place interfaces with classes that use them rather than those that implement them?

问题 I was going through an article by Robert C. Martin and at one place he gave a example like this: The first image shows that there's a cyclic dependency between the two packages. To remove this dependency a new interface is added in the second image. B implements the interface and Y uses it. And Martin makes the following point: Interfaces are very often included in the package that uses them, rather than in the package that implements them. My question is, why should we arrange interfaces

“ValueError: unknown locale: UTF-8” when importing pandas in python 2.7 [duplicate]

阅读更多关于 “ValueError: unknown locale: UTF-8” when importing pandas in python 2.7 [duplicate]

问题 This question already has answers here : IPython Notebook locale error [duplicate] (4 answers) Closed 3 years ago . I'm very new in python and would like to learn using pandas, but I can't even use the package properly in my python. In the terminal I tried $ conda install pandas The result is: Fetching package metadata ....... Solving package specifications: .......... # All requested packages already installed. # packages in environment at /Users/rudyyuan/anaconda: # pandas 0.18.1 np111py27

pro 文件生成sln

阅读更多关于 pro 文件生成sln

pro 文件生成sln 2012年的工程，使用pro管理的，qt4 项目 pro 文件生成sln 使用qt4的控制台 ··· %COMSPEC% /k “D:\Qt\4.7.1\bin\qtvars.bat vsvars vs2015” ··· 输入以下命令： qmake -tp vc -r pro文件的内容 TEMPLATE = subdirs TARGET = DEPENDPATH += . INCLUDEPATH += . SUBDIRS = \ packages CONFIG += ordered pro 文件生成sln \media-pc\build E:\hhhuyyya\EDU-pcsdk\media-pc\build>configure.bat [info]build work dir: E:\hhhuyyya\EDU-pcsdk\media-pc\build\ E:\hhhuyyya\EDU-pcsdk\media-pc\build> E:\hhhuyyya\EDU-pcsdk\media-pc\build>cd .. E:\hhhuyyya\EDU-pcsdk\media-pc>make.bat E:\hhhuyyya\EDU-pcsdk\media-pc>qmake -tp vc -r Reading E:/hhhuyyya/EDU-pcsdk/media

sublime text3 安装插件

阅读更多关于 sublime text3 安装插件

一，package control 见：https://packagecontrol.io/installation#st3 1，(ctrl+~) [view->show console] - 输入下面代码，重启st import urllib.request,os,hashlib; h = '2deb499853c4371624f5a07e27c334aa' + 'bf8c4e67d14fb0525ba4f89698a6d7e1'; pf = 'Package Control.sublime-package'; ipp = sublime.installed_packages_path(); urllib.request.install_opener( urllib.request.build_opener( urllib.request.ProxyHandler()) ); by = urllib.request.urlopen( 'http://packagecontrol.io/' + pf.replace(' ', '%20')).read(); dh = hashlib.sha256(by).hexdigest(); print('Error validating download (got %s instead of %s), please try manual

STM32HAL库学习笔记（1）——开发环境搭建

阅读更多关于 STM32HAL库学习笔记（1）——开发环境搭建

1、开发环境安装包获取小熊派开源社区已为大家整理了常用开发工具的下载地址，包括嵌入式硬件开发、嵌入式软件开发、应用软件开发等工具，可在公众号的对话框中获取下载地址。 2、STM32CubeMX介绍 STM32CubeMX是配置和初始化C代码生成的图形化工具（STM32 configurationand initialization C code generation），如下图所示。 3、安装Java环境(JRE) 因为STM32CubeMX是采用Java语言编写的，所以需要先在电脑上安装Java运行环境（JRE，Java runtime Environment），安装JRE时建议选择Java 8或者以后的版本。安装JRE有两种方式：单独的安装Jre；直接安装开发者套件JDK，其中就包括了JRE，这样以后还能用于开发Java。这里我们可以直接下载开源社区提供的常用工具里的JRE安装包，并双击安装就可以了。 4、获取STM32CubeMX STM32CubeMX可以访问STM32官网( https://www.st.com/en/development-tools/stm32cubemx.html )获取：然后同意下载协议，填写一些信息，ST会向填写的邮箱中发送一封邮件，点击邮件中的链接即可下载。 5、安装STM32CubeMX 解压下载的压缩包

.NET CORE+CENTOS部署+supervisor守护

阅读更多关于 .NET CORE+CENTOS部署+supervisor守护

一、安装.NetCore和发布项目1、要开始安装.NET，您需要注册微软签名密钥并添加微软产品提要。这只需要每台机器做一次。打开命令提示符并运行以下命令sudo rpm --import https://packages.microsoft.com/keys/microsoft.asc sudo sh -c 'echo -e "[packages-microsoft-com-prod]\nname=packages-microsoft-com-prod \nbaseurl= https://packages.microsoft.com/yumrepos/microsoft-rhel7.3-prod\nenabled=1\ngpgcheck=1\ngpgkey=https://packages.microsoft.com/keys/microsoft.asc" > /etc/yum.repos.d/dotnetdev.repo'2、更新 yum:sudo yum update3、安装依赖： sudo yum install libunwind libicu4、安装.Net Core Sdk:(1)、先查看skd都有哪些版本sudo yum search dotnet-sdk（2）安装：sudo yum install dotnet-sdk-2.1.200.x86_645

R: Source personal scripts keeping some functions hidden

阅读更多关于 R: Source personal scripts keeping some functions hidden

问题 Follow up to this I want to source scripts inside a given environment, like in sys.source , but "exporting" only some functions and keeping the others private . I created this function: source2=function(script){ ps=paste0(script, "_") assign(ps, new.env(parent=baseenv())) assign(script, new.env(parent=get(ps))) private=function(f){ fn=deparse(substitute(f)) assign(fn, f, parent.env(parent.frame())) rm(list=fn, envir=parent.frame()) } assign("private", private, get(script)) sys.source(paste0

Oracle Grid Installation - Missing Packages compat-libcap1-1.10 and others

阅读更多关于 Oracle Grid Installation - Missing Packages compat-libcap1-1.10 and others

问题 There are a few packages missing and they show up as non-fixable on Oracle Grid Installation wizard. Missing Packages: Package: compat-libcap1-1.10 Package: compat-libstdc++-33-3.2.3(x86_64) Package : libstdc++-devel-4.4.4(x86_64) Package: gcc-c++-4.4.4 Package: ksh-20100621 Package: libaio-devel-0.3.107 Were this packages suppose to come built-in with OS? I'm running Oracle Linux 6 on Virtual Box. Is there a way to install all of them at once or will I need to search and install one by one?

红帽7制作全自动安装光盘

阅读更多关于红帽7制作全自动安装光盘

环境： VMware 12 操作系统： redhat enterprise 7.3 全自动安装光盘也就是把光盘放进去，开机，等..................，然后就安装（操作系统）完毕了！好，那么怎么做呢？先来看下光盘的结构： images 文件系统镜像，可用它来生成用来启动红帽7 Linux 安装的引导介质 Packages 一大堆RPM包 repodata 解决依赖的 LiveOS 里面是个很关键的img（images里面也是这种文件） isolinux 这是核心，里面有initrd.img boot.msg boot.cat等其余的就木有那么重要了然后把它全部考到你的目录（除了packages,因为太大了）下所谓自动安装，就是提前写一个配置(ks.cfg)文件，告诉机器我要怎么安装这台操作系统，基本上每台linux操作系统安装好后都有这么一个配置文件在root家目录(/root/)，名字可能不一样，总之就叫什么.cfg配置如下 #%packages到第一个%end之间是需要安装的包，有@的是包组 #yum groups info core可以查看core包组的包，不包括依赖包 install keyboard 'us' rootpw --plaintext 123456 lang zh_CN.UTF-8 firewall --disabled auth -

Linux 安装pip-python

阅读更多关于 Linux 安装pip-python

1、先说一下什么是pip pip 是“A tool for installing and managing Python packages.”，也就是说pip是python的软件安装工具 2、下面介绍怎么在linux下安装pip 下载pip到/usr/local/srccd /usr/local/sr wget "https://pypi.python.org/packages/source/p/pip/pip-1.5.4.tar.gz#md5=834b2904f92d46aaa333267fb1c922bb" -- no - check - certificate 如果提示：-bash: wget: command not found 那么安装wget，执行如下： yum - y install wget 解夺安装pip tar - xzvf pip - 1 . 5 . 4 . tar . gz cd pip - 1 . 5 . 4 python setup . py install 如果安装报下面的错： Traceback (most recent call last): File “setup.py”, line 6, in from setuptools import setup, find_packages ImportError: No module named

订阅 packages