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python:元组和小括号的误导
书上说元组就是被包含在小括号里面,不能被修改。列表是包含在中括号里面,可以被修改。 列表中可以嵌套列表,元组中可以嵌套元组,一般没人混用,这点测试无误: >>> aa[0] (12, 34) >>> aa[0]=(1,2) Traceback (most recent call last): File "", line 1, in TypeError: 'tuple' object do...
分类:编程语言   时间:2015-08-14 21:33:11    阅读次数:211
修改eclipse默认workspace
三种方法 (只改其一可能无效,最好都试试)1. 修改exlipse安装目录下\configuration\.settings\org.eclipse.ui.ide.prefs文件,修改RECENT_WORKSPACES这个keyRECENT_WORKSPACES=C\:\\developworks\...
分类:系统相关   时间:2015-08-13 20:01:37    阅读次数:495
python运行报错:urllib2.URLError: <urlopen error [Errno 10061] >
Traceback (most recent call last): File "F:\adt-bundle-windows-x86_64-20140702\eclipse\workspace1\XueChe\src\xueche2\0\xueche.py", line 19, in dr...
分类:编程语言   时间:2015-08-13 17:12:32    阅读次数:1926
安装python软件找不到setuptools的解决方案
在新装的centos系统中,用源码安装supervisor提示如下: [root@1e supervisor-3.0]# python setup.py install Traceback (most recent call last): File "setup.py", line 31, in from setuptools import setup, find_packages...
分类:编程语言   时间:2015-08-12 19:43:32    阅读次数:184
SQL data reader reading data performance test
/*Author: Jiangong SUN*/As I've manipulated a lot of data using SQL data reader in recent project. And people says it's not good to access the data by...
分类:数据库   时间:2015-08-11 13:57:03    阅读次数:210
poj 3620 Avoid The Lakes
Avoid The Lakes Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 7034   Accepted: 3740 点击打开链接 Description Farmer John's farm was flooded in the most recent...
分类:其他好文   时间:2015-08-08 09:13:04    阅读次数:162
python学习笔记(异常)
什么是异常python用异常对象(exceptionobject)来表示异常情况。遇到错误后,会引发异常。如果异常对象并未被处理或捕捉,程序就会用所谓的回溯(Traceback,一种错误信息)终止执行>>> 1/0Traceback (most recent call last): File ""....
分类:编程语言   时间:2015-08-06 16:44:43    阅读次数:392
Avoid The Lakes--poj3620
Avoid The LakesTime Limit:1000MSMemory Limit:65536KTotal Submissions:7023Accepted:3735DescriptionFarmer John's farm was flooded in the most recent sto...
分类:其他好文   时间:2015-08-05 20:10:36    阅读次数:134
AttributeError: 'module' object has no attribute 'Thread'
$ python thread.py starting at: 2015-08-05 00:24:24Traceback (most recent call last): File "thread.py", line 28, in main() File "thread.py", line 16,....
分类:其他好文   时间:2015-08-05 06:25:57    阅读次数:153
POJ 3620 Avoid The Lakes
Avoid The LakesDescriptionFarmer John's farm was flooded in the most recent storm, a fact only aggravated by the information that his cows are deathly...
分类:其他好文   时间:2015-08-05 00:58:42    阅读次数:113
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