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视频讲解-Java调用DLL

python使用in操作符时元组和数组的区别分析

在python中可以使用in符号判断指定的元素是否存在于列表中，但我发现元组和数组存在区别，下面是详细实验结果。>>>'jb51.net'in['haotu.net','jb51.net']True>>>'jb51.net'in('haotu.net','jb51.net')True>>>'jb51.net'in['jb51.net/codes','haotu.net']False>>>'jb51.net'in('jb51.net/codes','haot

系统 2019-09-27 17:47:15 2013

Python

Python 执行字符串表达式函数(eval exec execfile)

仔细研读后学习了三个函数：eval:计算字符串中的表达式exec:执行字符串中的语句execfile:用来执行一个文件需注意的是，exec是一个语句，而eval()和execfile()则是内建built-in函数。Python2.7.2(default,Jun122011,15:08:59)[MSCv.150032bit(Intel)]onwin32Type"help","copyright","credits"or"license"formoreinf

系统 2019-09-27 17:46:53 2013

Python

Python3+Django+MySQL+uWSGI+Nginx

项目目录结构：按照下图所示创建build文件夹及内容Dockerfile:FROMubuntu:16.04FROMpython:3.6ENVhttp_proxy=http://172.16.6.67:3128ENVhttps_proxy=http://172.16.6.67:3128RUNapt-get-yupdate&&\apt-get-yupgrade&&\apt-getinstall-y\vim\git\python3-dev\python3-set

系统 2019-09-27 17:46:45 2013

Python

Python+django实现文件下载

（1）方法一、直接用a标签的href+数据库中文件地址，即可下载。缺点：wordexcel是直接弹框下载，对于imagetxt等文件的下载方式是直接在新页面打开。（2）方法二、在python后台对下载内容进项处理，返回内容直接弹出下载框。#后台处理函数defdownloadFile(req):filename=basePath+req.GET['url']deffile_iterator(file_name,chunk_size=512):withopen

系统 2019-09-27 17:46:33 2013

Python

【Python练习圣典】字典dictionary高级操作

1.字典键-值对中，值元素的便捷创建增减主要是利用collections中的defaultdict普通复杂过程：pairs=[('a',1),('a',2),('b',2)]d={}forkey,valueinpairs:ifkeynotind:d[key]=[]d[key].append(value)或d={}#普通字典d.setdefault('a',[]).append(1)d.setdefault('a',[]).append(2)d.setdef

系统 2019-09-27 17:46:19 2013

Python

Python中让MySQL查询结果返回字典类型的方法

Python的MySQLdb模块是Python连接MySQL的一个模块，默认查询结果返回是tuple类型，只能通过0,1..等索引下标访问数据默认连接数据库：复制代码代码如下:MySQLdb.connect(host=host,user=user,passwd=passwd,db=db,port=port,charset='utf8')查询数据：复制代码代码如下:cur=conn.cursor()cur.execute('selectb_idfromblo

系统 2019-09-27 17:46:17 2013

Python

Python常用库推荐

IPython+ptpython，完美体验首先是安装pipinstallipythonptpython然后使用ptipython有什么好处1.IPython是非常强大的Python增强工具2.ptpython提供了类似IDE的自动补全功能3.当你在命令行输入pyipython时，便结合了这两者的功能，无比强大！virtualenv+virtualenvwrapper，轻松创建隔离环境首先安装pipinstallvirtualenvwrapper（会自动把v

系统 2019-09-27 17:38:45 2013

编程技术

如果给UCHome插上OpenSocial的翅膀

1.从“站点+MYOP平台+应用”三层架构--------》到“站点（shindig插件）+应用(符合opensocial规范)”两层架构，速度带来提升。2.做UCHOME的Opensocial插件，可参考partuza：http://code.google.com/p/partuza/PartuzaisanexampleOpenSocial-SocialNetworkSitethatusesApacheShindig.3.开发的应用略微修改、或不经修改应

系统 2019-08-29 23:46:29 2013

编程技术

photoshop结合Flash制作瓢虫动画(二)

这个图像将成为虫虫身上的贴图。有人会说了，三维动画才用贴图啊。嘿嘿，今天大家和我一齐，为平面图加贴图吧。打开这张图像，将其拉入我们的瓢虫图中，设置如图示，改名为“映射”。使用“滤镜”-“扭曲”-“极坐标”-“平面坐标到极坐标”，我们把这张平淡的图像做成围绕型。之所以使用这个扭曲，是因为我们将把它放在虫虫背壳上。得让它看上去有凸起的感觉，我们如果用球面化滤镜的话，可能得到的结果并不理想。用极坐标，虽然它的扭曲结果并不是真正的凸起，但是得到的效果却是最好的，所

系统 2019-08-29 23:35:08 2013

编程技术

完整的简单层拖动代码

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