1 #! /usr/bin/env python 2 # -*- coding: utf-8 -*- 3 # __author__ = "DaChao" 4 # Date: 2017/6/7 5  6 # x = "234567ASDsdfghj"  #切片和索引 7 # print(x[2:-2]) 8 # print(x[2]) 9 10 # x = "hello"     #显示字符串长度，注意是从1开始11 # print(len(x))12 13 # x = "hello world ASDF"  #返回长度为100的字符串，并在右侧填充014 # print(x.zfill(100))15 16 # x = "hello world ASDF"  #小写变为大写17 # print(x.upper())18 # x = "234567ASDsdfghj"  #大写变为小写19 # print(x.lower())20 # x = "234567sdfghj"  #判断是否含有至少一个区分大小写的字符，并且这些都是小写21 # # print(x.islower())22 23 # x = "hello world"   #返回标题化字符串24 # print(x.title())25 26 # x = "Hello World"   #翻转字符串中的大小写27 # print(x.swapcase())28 29 # x = "     hello world     "     #同时执行lstrip和rstrip，删除两边30 # print(x.strip())31 32 # x = "hello world"   #检测开头或结尾33 # print(x.startswith(‘hea‘))34 # x = "hello world"35 # print(x.endswith(‘o‘,0,5))36 37 # x = "234567ASDsd\nfASDghjASD"  #以\n行分隔，返回一个包含元素的列表38 # print(x.splitlines(True))39 40 # x = "234567ASDsdfASDghjASD"  #以A分隔x，并可指定次数41 # print(x.split(‘A‘,2))42 43 # x = "234567ASDsdfASDghjASD"  #替换字符串，并且可指定次数44 # print(x.replace(‘ASD‘,‘ABC‘,1))45 46 # x = "234567ASDsdfghj"  #以7为中间符，分割x47 # print(x.partition(‘7‘))48 49 # x = "234567ASDZzsdfghj"  #返回x中最大的字母（小写）50 # print((max(x)))51 52 # x = "121   234567ASDsdfghj"  #截掉x左边的153 # print(x.lstrip(‘1‘))54 55 # x = "234567sdfghj"  #左对齐，并以*填充剩余数量（20）56 # print(x.ljust(20,‘*‘))57 58 # x = "*"  #以x为分隔符重新生成y59 # y = "abc"60 # print(x.join(y))61 62 # x = "Asdf112321 Gh123J"  #判断是否首字符为大写，其它为小写63 # print(x.istitle())64 # x = "  "  #判断是否只包含空格65 # print(x.isspace())66 # x = "234567f"  #判断是否只包含*数字字符*67 # print(x.isnumeric())68 # x = "234567"  #判断是否全为数字69 # print(x.isdigit())70 # x = "234567sdfghj"  #判断是否全为十进制数字71 # print(x.isdecimal())72 # x = "234567sdfghj"  #判断是否全为字母73 # print(x.isalpha())74 # x = "234567sdfghj"  #判断是否全为字母或数字75 # print(x.isalnum())76 77 # x = "hello world"   #index同find，但查不到，会返回异常！！！78 # print(x.index(‘a‘))79 # x = "hello world"   #find查找字符串并返回索引值80 # print(x.find(‘d‘))81 82 # x = "name:{2},age:{1},sex:{0}"  #format格式化字符串83 # print(x.format(‘chao‘,‘18‘,‘male‘))84 # x = "name:{},age:{},sex:{}"85 # print(x.format(‘chao‘,‘18‘,‘male‘))86 87 # x = "hello \tworld"   #\t tab符号88 # print(x.expandtabs(100))89 90 # x = "hello world"    #在指定范围内，返回l的次数91 # print(x.count(‘l‘,3,10))92 93 # x = "hello world"    #中间插入字符串，两边填充*94 # print(x.center(30,‘*‘))

  1 #! /usr/bin/env python  2 # -*- coding: utf-8 -*-  3 # __author__ = "DaChao"  4 # Date: 2017/6/7  5   6 ‘‘‘  7 work8:  8 1.两层while循环，外层的while循环，让用户输入用户名、密码、工作了几个月、每月的工资（整数），  9 用户名或密码为空，或者工作的月数不为整数，或者月工资不为整数，则重新输入 10 2.认证成功，进入下一层while循环，打印命令提示，有查询总工资，查询用户身份 11 （如果用户名为alex则打印super user，如果用户名为yuanhao或者wupeiqi 12 则打印normal user，其余情况均打印unkown user），退出功能 13 3.要求用户输入退出，则退出所有循环（使用tag的方式） 14  15  16 运行效果如下： 17 user: egon 18 password: 123 19 work_mons: 12 20 salary: 10000 21  22             1 查询总工资 23             2 查询用户身份 24             3 退出登录 25              26 >>: 1 27 总工资是: 120000.0 28  29             1 查询总工资 30             2 查询用户身份 31             3 退出登录 32              33 >>: 2 34 unkown user 35  36             1 查询总工资 37             2 查询用户身份 38             3 退出登录 39              40 >>: 3 41 ‘‘‘ 42  43 #work8 2 44 tag = True 45  46 while tag: 47     while tag: 48         user = input("Please input your username: ")#解决问题：用户名必须非空格和回车！！！ 49         if len(user) != 0 and not user.isspace(): 50             break 51     while tag: 52         password = input("Please input your password: ") 53         if len(password) != 0 and not password.isspace(): 54             break 55     workhours = input("Please input your work hours: ") 56     salary_m = input("Please input your monthly salary: ") 57     tag = workhours.isdigit() and salary_m.isdigit() 58     while tag: 59         print("         1、查询总工资") 60         print("         2、查询用户身份") 61         print("         3、退出登录") 62         order = input("Please input your choose number: ") 63 #        while order == "1" or "2" or "3": 64         if order == "1":    #如果不按照惯性输入，怎么办？？ 65             print("总工资是： ",int(workhours)*int(salary_m))    #对输入数字取整数！！！ 66         elif order == "2": 67             if user == "alex": 68                 print("*******Super user*******") 69             elif user == "yuanhao" or "wupeiqi": 70                 print("*******Normal user*******") 71             else: 72                 print("*******Unknown user*******") 73         elif order == "3": 74             print("*******用户已退出！*******") 75             tag = False 76  77  78 #work8 1 79 # tag = True 80 # 81 # while tag: 82 #     user = input("Please input your username: ")    #有个问题：直接回车也跳过指令！！！ 83 #     password = input("Please input your password: ") 84 #     jobtime = input("Please input your time of job: ") 85 #     salary_m = input("Please input your monthly salary: ") 86 #     tag = user.isspace() or password.isspace() or not jobtime.isdigit() or not salary_m.isdigit() 87 #     while not tag: 88 #         print("         1、查询总工资") 89 #         print("         2、查询用户身份") 90 #         print("         3、退出登录") 91 #         order = input("Please input your choose number: ") 92 #         if order == "1": 93 #             print("总工资是： ",int(jobtime)*int(salary_m)) 94 #         elif order == "2": 95 #             if user == "alex": 96 #                 print("Super user") 97 #             elif user == "yuanhao" or "wupeiqi": 98 #                 print("Normal user") 99 #             else:100 #                 print("Unknown user")101 #         elif order == "3":102 #             print("用户已退出！")103 #             break104 105 ‘‘‘106 work7: 编写while循环，让用户输入内容，判断输入的内容以alex开头的，则将该字符串加上_SB结尾107 ‘‘‘108 109 # tag = True110 # while tag:111 #     content = input("Please input your content: ")112 #     tag = not content.startswith("alex")113 # print(content,"SB")114 115 ‘‘‘116 work6: 编写while循环，让用户输入用户名和密码，如果用户为空或者数字，则重新输入117 ‘‘‘118 119 # tag = True120 # while tag:121 #     user = input("Please input your username: ")122 #     password = input("Please input your password: ")123 #     tag = user.isspace() or user.isdigit()124 # print("You passed!")125 126 ‘‘‘127 work5: 编写while循环，要求用户输入命令，如果命令为空，则继续输入128 ‘‘‘129 130 # tag = True131 # while tag:132 #     order = input("Please input your order: ")133 #     tag = order.isspace()134 # print("You passed.")135 136 ‘‘‘137 work4: msg=‘/etc/a.txt|365|get‘ 将该字符的文件名，文件大小，操作方法切割出来138 ‘‘‘139 140 # msg = ‘/etc/a.txt|365|get‘141 # print(msg.split(‘|‘))142 143 ‘‘‘144 work3: msg=‘hello alex‘中的alex替换成SB145 ‘‘‘146 147 # msg = ‘hello alex‘148 # print(msg.replace("alex","SB"))149 150 ‘‘‘151 work2: 编写while循环，利用索引遍历出每一个字符152 ‘‘‘153 154 # w = "My daughter has some cartoon characters on her shirt."155 # i = 0156 # while i < len(w):157 #     print (w[i])158 #     i+=1159 160 161 ‘‘‘162 work1：编写for循环，利用索引遍历出每一个字符163 ‘‘‘164 165 # w = "My daughter has some cartoon characters on her shirt."166 #167 # for i in range(0,len(w)):168 #     print(w[i])