电子教案6-1组合数据类型-lht.pptxVIP

;第五章 组合数据类型;组合数据类型概述;基本数据———组合数据; 组合数据类型能够将多个同类型或不同类型的数据组织起来，通过单一的表示使数据操作更有序更容易。根据数据之间的关系，组合数据类型可以分为三类： 序列类型、集合类型和映射类型。 ;序列类型;序列类型;序列类型;序列类型;序列类型;序列类型;集合类型;集合类型;集合类型;集合类型;集合类型;集合类型;集合类型;映射类型;列表类型和操作;列表类型的概念;列表类型的概念;列表类型的概念;列表类型的概念;列表类型的概念;列表类型的操作;vlist = list(range(5)) vlist [0, 1, 2, 3, 4] len(vlist[2:]) #计算从第3个位置开始到结尾的子串长度 3 2 in vlist #判断2是否在列表vlist中 True vlist[3]=python #修改序号3的元素值和类型 vlist [0, 1, 2, python, 4] vlist[1:3]=[bit, computer] vlist [0, bit, computer, 3, 4];列表类型的操作;列表类型的操作;基本统计值计算;基本统计值的计算;基本统计值的计算;基本统计值的计算;基本统计值的计算;基本统计值的计算;基本统计值的计算;字典类型的计算;字典类型的基本概念;字典类型的基本概念;字典类型的基本概念;字典类型的操作;字典类型的操作;字典类型的操作;字典类型的操作;字典类型的操作;jieba库的使用;jieba库的概述;jieba库的解析;jieba库的解析;文本词频统计;《Hamlet》英文词频统计;《Hamlet》英文词频统计;实例代码10.2;《Hamlet》英文词频统计;《三国演义》人物出场统计 ;《三国演义》人物出场统计 ;《三国演义》人物出场统计 ;《三国演义》人物出场统计 ;《三国演义》人物出场统计 ;《三国演义》人物出场统计 ;Python之禅;Python之禅 ;Python之禅 ;The Zen of Python, by Tim Peters ? Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex. Complex is better than complicated. Flat is better than nested. Sparse is better than dense. Readability counts. Special cases arent special enough to break the rules. Although practicality beats purity. Errors should never pass silently. Unless explicitly silenced. In the face of ambiguity, refuse the temptation to guess. There should be one-- and preferably only one --obvious way to do it. Although that way may not be obvious at first unless youre Dutch. Now is better than never. Although never is often better than *right* now. If the implementation is hard to explain, its a bad idea. If the implementation is easy to explain, it may be a good idea. Namespaces are one honking great idea -- lets do more of those!;Python之禅 ;Python之禅 ;Python之禅 ;Python之禅