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视频讲解-Java调用DLL

详解python中Numpy的属性与创建矩阵

ndarray.ndim：维度ndarray.shape：形状ndarray.size：元素个数ndarray.dtype：元素数据类型ndarray.itemsize：字节大小创建数组：a=np.array([2,23,4])#list1dprint(a)#[2234]指定数据类型：a=np.array([2,23,4],dtype=np.int)print(a.dtype)#int64dtype可以指定的类型有int32,float,float32,后

系统 2019-09-27 17:50:47 1855

Python

Python基础---变量

Python基础---变量什么是变量:用来绑定数据对象的标识符一.变量的命名规则:变量名必须为字母或下划线开头,后跟字母或下划线或数字不能使用python的关键字命名命名规则可以被视为一种惯例，并无绝对与强制目的是为了增加代码的识别和可读性在定义变量时，为了保证代码格式，=的左右应该各保留一个空格在Python中，如果变量名需要由二个或多个单词组成时，可以按照以下方式命名每个单词都使用小写字母单词与单词之间使用_下划线连接例如：first_name、ast

系统 2019-09-27 17:50:40 1855

Python

【python】UnicodeDecodeError: 'gbk' codec

UnicodeDecodeError:'gbk'codeccan'tdecodebyte0x80inposition128:illegalmultibytesequence说到底是open()使用方法。原本程序是这样的：（重点看第4行）fromtkinterimport*importosdefopenFile():f=open('D:\Pythoncharmprojccts\SC\main_window.py',mode='r')whileTrue:dat

系统 2019-09-27 17:50:35 1855

Python

Python编程入门的一些基本知识

Python与Perl，C和Java语言等有许多相似之处。不过，也有语言之间有一些明确的区别。本章的目的是让你迅速学习Python的语法。第一个Python程序：交互模式编程：调用解释器不经过脚本文件作为参数，显示以下提示：$pythonPython2.6.4(#1,Nov112014,13:34:43)[GCC4.1.220120704(RedHat5.6.2-48)]onlinux2Type"help","copyright","credits"or"

系统 2019-09-27 17:47:53 1855

Python

Python实现命令行通讯录实例教程

1、实现目标编写一个命令行通讯录程序，可以添加、查询、删除通讯录好友及电话2、实现方法创建一个类来表示一个人的信息。使用字典存储每个人的对象，名字作为键。使用pickle模块永久地把这些对象存储下来。使用字典内建的方法添加、删除修改人员信息。3、思维导图4、编写伪代码#1.创建字典用来存储通讯录信息#2.创建人员类，包含姓名、关系、电话三个属性#3.创建操作类，包含增加、查询、删除人员，退出，保存并退出五个方法#4.程序运行#5.判断通讯录文件是否存在#6

系统 2019-09-27 17:38:45 1855

Python

Python爬虫实现（伪）球迷速成

还有4天就世界杯了，作为一个资深（伪）球迷，必须要实时关注世界杯相关新闻，了解各个球队动态，这样才能在一堆球迷中如（大）鱼（吹）得（特）水（吹），迎接大家仰慕的目光!给大家分享一个快速了解相关信息的办法：刷论坛！我们来一起做个虎扑论坛的爬虫吧！抓包获取虎扑论坛相关帖子内容，逐条显示！先来观察下网页，打开论坛首页，选择国际足球然后往下拉，找到世界杯相关内容这里就是我们的目标了，所有相关的新闻都会在这里显示，用F12打开“开发者工具”然后往下浏览看看数据包注意

系统 2019-09-27 17:38:33 1855

编程技术

Understanding SIP with Network Address Trans

TheNetworkAddressTranslation(NAT)protocolenablesmultiplehostsinaprivatesubnettoshareasinglepublicIPaddresstoaccesstheInternet.Foroutgoingtraffic,NATreplacestheprivateIPaddressofthehostintheprivatesubnetwiththepublicIPaddress.Forin

系统 2019-08-29 23:33:54 1855

编程技术

“鱼”情未了

啊~要迟到了，又要迟到了~~~偶滴30元RMB又要飞咯...不过今天的30元交的一点不让我郁闷，原因是，我的鱼儿又活过来了，哇哈哈哈！都说宠物狗与人心灵相通，这个我信。但是否所有的宠物与主人都有心灵感应这就不得而知了。事情就发生在这个不能再平凡的周一早晨。一如既往的，洗漱着装完毕，打开卧室的门，步入客厅。平时的我一定大步走向餐厅饭饭去了，今天就不知怎么特别想去关怀一下我的小金鲤鱼。这一看，就让偶心里一沉，鱼缸里怎么就剩一条了哩~~~那只最壮硕的小金鲤鱼哪去

系统 2019-08-29 23:06:44 1855

编程技术

使用 JAX-RS 简化 REST 应用开发

原文链接：http://www.ibm.com/developerworks/cn/java/j-lo-jaxrs/index.htmlREST简介REST是英文RepresentationalStateTransfer的缩写，有中文

系统 2019-08-29 22:34:54 1855

编程技术

ext中ComboBox+Ajax+分页联动代码和注释

今天花了1下午时间研究出了ComboBox+Ajax+分页联动效果.ext学习初步见效下面代码直接就能运行,用list模拟了数据库中取数据以下是目录结构以下是代码test1.jsp<%@pagelanguage="java"import="java.util.*"pageEncoding="UTF-8"%></span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:28:19</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">1855</span></span>  </p> </article><div class="pagination" style="display:;"> <ul><li><a href="/search/scala/1/p/1">首页</a></li> <li class="prev-page"><a href="/search/scala/1/p/2515">上一页</a></li> <li><a href="/search/scala/1/p/2514">2514</a></li><li><a href="/search/scala/1/p/2515">2515</a></li><li class="active"><span>2516</span></li><li><a href="/search/scala/1/p/2517">2517</a></li><li><a href="/search/scala/1/p/2518">2518</a></li> <li class="next-page"><a href="/search/scala/1/p/2517">下一页</a></li> <li><a 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