below is a good answer for this question , so I copy on here for some people need it By the way, the three forms can be combined as follows: def f(a,*b,**c): All single arguments beyond the first will end up with the tuple b, and all key/value argume…

Lists 列表 一.基础知识 定义 >>> sList = list("hello") >>> sList ['h', 'e', 'l', 'l', 'o'] 功能函数 append # 添加一个元素 pop # 拿走一个元素 sort reverse In [11]: dir(list) Out[11]: ['__add__', '__class__', '__contains__', '__delattr__', '__delitem__',…

zip is a built-in function that takes two or more sequence and ‘zips’ them into a list of tuples, where each tuple contains one element from each sequence. The result is a list of tuples where each tuple contains a character from the string and the c…

12.1 Tuples are immutable(元组是不可变的)A tuple is a sequence of values. The values can be any type, and they are indexed by integers, so in that respect tuples are a lot like lists. The important difference is that tuples are immutable.Syntactically, a tu…

总结了10道题的考试侧重点,供参考: 1.How are arguments passed – by reference of by value? 考的是语法,基本功,虽说python程序员可以不用关心堆栈指针那些头疼的东东,但传引用和传值的区别还是必需清楚的.个人感觉从python中一切都是对象的角度看,第一题问传值还是传引用其实是考官有意看面试者是不是概念清楚,真正希望考生回答的是哪些对象传递到函数中是只读的或者说不可变的. 2.Do you know what list and dict…

QQ:231469242 欢迎喜欢nltk朋友交流 http://www.cnblogs.com/undercurrent/p/4754944.html 一.信息提取模型 信息提取的步骤共分为五步,原始数据为未经处理的字符串, 第一步:分句,用nltk.sent_tokenize(text)实现,得到一个list of strings 第二步:分词,[nltk.word_tokenize(sent) for sent in sentences]实现,得到list of lists of stri…

The open source, cross platform, free C++ IDE. Code::Blocks is a free C++ IDE built to meet the most demanding needs of its users. It is designed to be very extensible and fully configurable. Finally, an IDE with all the features you need, having a c…

This is a quick guide covering nearly all of Nemerle's features. It should be especially useful to anyone who is already familiar with C# or a similar language: Table of Contents Variables Operators Logical Operators Bit Operators Type Casts/Conversi…

原文地址:http://www.ibm.com/developerworks/webservices/library/ws-pyth10/index.html 摘要:概括地说,您可以将 XML-RPC 认为是简化的 SOAP.它是允许运行在不同操作系统.不同环境中的软件进行基于Internet 过程调用的规范和一组实现.这种远程过程调用使用 HTTP 作为传输协议,XML 作为编码格式.XML-RPC 的定义尽可能简单,但能够传送.处理和返回复杂的数据结构. The Python web ser…

#-*- coding:utf-8 -*- ##D.has_key(k): A predicate that returns True if D has a key k.##D.items(): Returns the contents of dictionary D as a list of two-element tuples(k,v),##D.iteritems():Returns an iterator that generates the values from dictionary…