Python 深入理解yield
只是粗略的知道yield可以用来为一个函数返回值塞数据,比如下面的例子:Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/def addlist(alist):
只是粗略的知道yield可以用来为一个函数返回值塞数据,比如下面的例子:Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/def addlist(alist):
Python中初始化一个5 x 3每项为0的数组,最好方法是:Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/multilist = [[0 for col
其他语言中,比如C#,我们通常遍历数组是的方法是:Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/for (int i = 0; i < list.Le
1. copy.copy 浅拷贝 只拷贝父对象,不会拷贝对象的内部的子对象。2. copy.deepcopy 深拷贝 拷贝对象及其子对象一个很好的例子:Code highlighting produced by Actipro CodeHighlighter (freeware)http://www
例一:使用httplib访问某个url然后获取返回的内容:Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/import httplibconn=httplib
Python代码:Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/import os, sysos.system(sys.argv[1])带参数执行 pyth
同时,关于datetime也是简单介绍。因为有很多东西需要自己去使用,去查帮助才最有效。例子:计算上一个星期五并输出。解答:实现代码如下: import datetime, calendar lastFriday = datetime.date.today( ) oneday = datetime.
比如:Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/import linecacheprint linecache.getline('2.1_open.py
1.open使用open打开文件后一定要记得调用文件对象的close()方法。比如可以用try/finally语句来确保最后能关闭文件。file_object = open('thefile.txt')try:all_the_text = file_object.read( )finally:fil
具体的实例 我们需要在目录中遍历,包括子目录(哈哈),找出所有后缀为:rmvb ,avi ,pmp 的文件。(天哪?!你要干什么?这可是我的隐私啊~~) 实现代码如下:import os def anyTrue(predicate, sequence): return True in map(pre