一、字符串总结与练习
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0
14 # 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x
47 # 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1
53 # 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y
59 # 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,‘*‘))
字符串总结及练习
二、作业及相关
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 # break
104
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 = True
110 # 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 = True
120 # 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 = True
131 # 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SB
145 ‘‘‘
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 = 0
156 # while i < len(w):
157 # print (w[i])
158 # i+=1
159
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])
作业及相关
时间： 2024-10-25 11:08:07