list = ['KOBE', 'INGRAM', 'BALL', 7777];
list1 = [1,2,3,4,5];list.append('JAMES');
print ( list);list.extend(list1);
print ( list);list.insert(1,'KUZMA');
print ( list);list[0]='MAGIC';
print ( list);

list = ['KOBE', 'INGRAM', 'BALL', 7777];
list1 = [1,2,3,4,5];del list[1];
print (list)list.pop()
print (list)list.pop(1)
print (list)

list = ['KOBE', 'INGRAM', 'BALL', 7777];
list1 = [1,2,3,4,5];x = list.index('KOBE');
print(x);y = list[0];
print(y);z = list[1:3];
print(z);

list1 = [1,2,3,4,5];print(len(list1));print(max(list1));print(min(list1));

tup1 = ('KOBE', 'INGRAM', 'BALL', 7777);
tup2 = (1,2,3,4,5);tup3 = tup1 + tup2;
print (tup3);

tup1 = ('KOBE', 'INGRAM', 'BALL', 7777);
tup2 = (1,2,3,4,5);del tup1;

tup1 = ('KOBE', 'INGRAM', 'BALL', 7777);
tup2 = (1,2,3,4,5);print ("tup1[0]: ", tup1[0]);
print ("tup1[1:3]: ", tup1[1:3]);

dict = {'KOBE': 24, 'JAMES': 23, 'BALL': 2,'KUZMA':0,'INGRAM':14};dict['KOBE'] = 8;
print(dict);dict['HART'] = 5;
print(dict);

dict = {'KOBE': 24, 'JAMES': 23, 'BALL': 2,'KUZMA':0,'INGRAM':14};del dict['JAMES'];
print(dict);dict.clear();
print(dict);del dict

dict = {'KOBE': 24, 'JAMES': 23, 'BALL': 2,'KUZMA':0,'INGRAM':14};print ( dict['KOBE']);

set = {'KOBE', 'JAMES', 'BALL','KUZMA','INGRAM'};
set.add('magic');
print(set);set.update({777,888});
print(set);

set = {'KOBE', 'JAMES', 'BALL','KUZMA','INGRAM'};
set.add('magic');
print(set);set.remove('JAMES')
print(set)

集合是无序的对象集，它和字典一样使用花括号{}，但没有键值对的概念。它属于可变的数据类型，一般用于保持序列的唯一性——也就是同样的元素仅出现一次。

在使用时一定要注意集合的无序和唯一两个特点，避免出错。

3.词频统计

• 1.下载一长篇小说，存成utf-8编码的文本文件 file

  2.通过文件读取字符串 str

  3.对文本进行预处理

  4.分解提取单词 list

  5.单词计数字典 set , dict

  6.按词频排序 list.sort(key=lambda),turple

  7.排除语法型词汇，代词、冠词、连词等无语义词

  • 自定义停用词表
  • 或用stops.txt

8.输出TOP(20)

• 9.可视化：词云

排序好的单词列表word保存成csv文件

import pandas as pdpd.DataFrame(data=word).to_csv('big.csv',encoding='utf-8')

线上工具生成词云：https://wordart.com/create