3章
内容回顾: 1. 计算机组成 2. 程序编译器 3. 变量 4. 条件 5. 循环 6. py2与py3区别 - 默认编码, - 除法, - input ,raw_input 7. 位,字节关系 8. 运算符: - and or - in not - py2 除法特殊代码 - += -= 9. 编码 汉字在utf-8里位3个字节,24位;汉字在GBK里是两个字节,16位 ascii --> unicode(4个字节,32位表示) ->(优化) utf-8/utf-16/utf-32 10. 字符串格式化 tpl = "asdfa&s,asdf%d" %("二哥", 666,) 问题: tpl = "我是%s",年龄%d,学习进度100%%" %('张勤学',99)
今日内容: - 数据类型 - 整数(int类) v = 1 ----擅长计算 - v = 1 - v.bit_length() - 布尔值(bool类) v = True -----擅长真或假 - 0 "" 为False,其他为True - v = 2 or 1 ----V的值是2 - 字符串(str类) 引号引起来 "1" v = "1" - 类提供的功能: - 变大、小写 - 去除空白 - 替换 - 分割(分割后是列表类型) - 首字母大写 PS:字符串本身不变化 - 公共功能: - 长度 - 索引(只能取值) - for循环 "张勤学,二个,成绩,XXX,信息," [“郑勤学,“二个”] - 列表(list类) v = ["XX",“OO”, "666"] #---存取多个值比较方便 - 类提供功能: - 追加 - 插入 PS:列表本身发生变化 - 公共功能: - 长度 - 索引(取值,修改,删除) 特殊的:v[0:2] = ["asdf",] - for循环 v[2] v[1] = "孙骑兵" - 元组(tuple类) v = ("XX",“OO”, "666") #PS:----元素不可以被修改 - 类提供功能: - 无 - 公共功能: - 长度 - for循环 - 索引(只能取值) - 字典(dict类)-----无序的 v = {"name":"张勤学","age":18} - 类提供的功能: - get - 公共功能: - 长度 - 索引(取值,删除,修改) - for循环 - for a in v.keys() - for a in v.values() - for a,b in v.items() v = "郑勤学,18" #-----字符串表示姓名年龄 v = ["郑勤学",18] #-----列表表示姓名年龄 v = { "name":"张勤学", "age":18 } #-----字典表示姓名年龄 v['name'] #指名字 v['age'] #指年龄 ===> 相同类的值(指定类的对象)具有相同的功能,功能保存在类中(只有一份) 今日作业: 内容整理
=============================================脚本=======================================
字符串类中的功能脚本:
1 ###############################str类中为当前对象提供的功能#########################
2 #str
3 # v1 = "alEx"
4
5 #1. 变大写
6 # value = v1.upper()
7 # print(v1,value)
8
9
10 #2,.变小写
11 # value = v1.lower()
12 # print(v1.value)
13
14
15 #3. 首字母变大写
16 # value = v1.capitalize()
17 # print(v1,value)
18
19 #4. 去除收尾空格
20 # v1 = " asdfasdf "
21 # print(v1)
22
23
24 # v1 = " asdfasdf "
25 # value = v1.strip()
26 # print(v1,value)
27
28 """
29 name = input("请输入用户名:")
30 if name == 'alex':
31 print('登录成功')
32 """
33
34 """
35 name = input("请输入用户名:")
36 value = name.strip()
37 if value == 'alex':
38 print('登录成功')
39 """
40
41 """
42 #去除左边空格 -----去除指定空格-----左边或右边
43
44 name = input("请输入用户名:")
45 value = name.lstrip()
46 if value == 'alex':
47 print('登录成功')
48
49 """
50
51 """
52 去除右边空格
53 name = input("请输入用户名:")
54 value = name.rstrip()
55 if value == 'alex':
56 print('登录成功')
57 """
58
59
60 #7. 替换
61 """
62 v1 = "ASCII第一次以规范标准的型态发表是在1967年标准,最后一次更新则标准是在1986年,至今为标准止共定义了128个字符,其中33个字符无法显示"
63
64 # value = v1.replace("标准", "**")
65 # print(value)
66
67
68 #只替换第1个标准,后面的不替换
69 value = v1.replace("标准", "**",1)
70 data = value.replace('第一次','#')
71 print(data)
72 """
73
74 #8. 分割:
75 """
76 v1 = "ASCII第一次以规范标准的型态发"
77 value = v1.split('第一次') #分割之后是列表类型
78 print(value)
79 """
80 """
81 v1 = "ASCII第一次以规范标准的型态发以规范标准的型态以规范标准的型态"
82 value = v1.split('标准') #分割之后是列表类型
83 print(value)
84 """
85
86 """
87 v1 = "ASCII第一次以规范标准的型态发以规范标准的型态以规范标准的型态"
88 value = v1.split('标准',2) #分割之后是列表类型
89 print(value)
90 """
91
92 #9. 判断当前字符串中是否全部都为数字
93 """
94 v = "abc123fsdf"
95 for item in v:
96 print(item) #item = "a", item = "b"
97 """
98
99 """
100 v = "123"
101 val = v.isdecimal()
102 print(val)
103 """
104
105 """
106 v = "a123"
107 val = v.isdecimal()
108 print(val)
109 """
110
111 #统计字符串中有多少个数字?-------"abc01234fsdf"
112 """
113 count = 0
114 v = "abc01234fsdf"
115 for item in v:
116 if item.isdecimal():
117 print(item)
118 count += 1
119 print(count)
120 """
121
122 #重点重点重点:原值不变
123
124 ###################公共功能###############
125
126 # 1.计算当前字符串长度
127
128 """
129 v = "徐芳名sdf"
130 value = len(v)
131 print(value)
132
133 """
134
135 """
136 name = input(">>>")
137 value = len(name)
138 print(value)
139 """
140
141 #取首字符或第几个字符
142 #2. 根据“索引” “下标”
143 # - 单个值:v[0]
144 # - 多个值:v[起始位置:结束位置]
145 # - 多个值: v[起始位置:结束位置:步长]
146 # PS: -1 表示最后
147
148 # 取第一个字符-----取单个字符
149 # v = "ASCII第一次以规范标准的型态发"
150 # value = v [0]
151 # print(value)
152
153 #取倒数第3个字符
154 # v = "ASCII第一次以规范标准的型态发"
155 # value = v [-3]
156 # print(value)
157
158
159 #动态计算取最后一个字符
160 # v = "ASCII第一次以规范标准的型态发"
161 # le = len(v) - 1
162 #-1表示最后一个字符
163 # value = v [le]
164 # print(value)
165
166 #取一部分字符,取从0到第几个之前的字符------连续字符
167 # v = "ASCII第一次以规范标准的型态发"
168 # value = v [0:5] # 0 1 2 3 4
169 # print(value)
170
171 #取某两个之间的字符
172 # v = "ASCII第一次以规范标准的型态发"
173 # value = v [4:5]
174 # print(value)
175
176 #取从第几个开始到结尾的字符
177 # v = "ASCII第一次以规范标准的型态发"
178 # value = v [4:]
179 # print(value)
180
181 # #取从第几个开始到最后一个之间的字符
182 # v = "ASCII第一次以规范标准的型态发"
183 # value = v [4:-1]
184 # print(value)
185
186
187 #取从第几个开始到第几个之间的字符,中括号中第3个数字表示步长,表示每隔几取一个
188 # v = "ASCII第一次以规范标准的型态发"
189 # value = v [1:15:3]
190 # print(value)
191
192
193 #题 : v = "ASCII第一次以规范标准的型态发" 连续将每个字符大印出来
194 """
195 v = "ASCII第一次以规范标准的型态发"
196 length = len(v)
197 index = 0
198 while True:
199 data = v[index]
200 print(data)
201 index += 1
202 if index == length:
203 break
204 print(data)
205 """
206
207 """
208 v = "ASCII第一次以规范标准的型态发"
209 length = len(v)
210 index = 0
211 while index < length:
212 data = v[index]
213 print(data)
214 index += 1
215 """
216
217 #3. 循环
218 # 将对象中每个元素,分别循环显示出来
219 """
220 v = "ASCII第一次以规范标准的型态发"
221 for item in v:
222 print(item)
223 """
上节回顾字符串格式化脚本:
1 # tpl = "我是%s,年龄%d,学习进度100%" %('张勤学',99)
2 # print(tpl)
3
4
5 #占位符只有格式化时才有意义
6 # tpl = "我是%s,年龄%d,学习进度100%"
7 # print(tpl)
8
9
10 # tpl = "我是%s,年龄%d,学习进度100" %('张勤学',99)
11 # print(tpl)
12
13
14 #如果想要%,需要写两个%
15 tpl = "我是%s,年龄%d,学习进度100%%" %('张勤学',99)
16 print(tpl)
int整数类脚本:
1 #int
2 # v1 = 1
3 # v2 = 23
4
5
6
7 #前戏
8 # 十进制 0 1 2...9
9 #八进制 0 1 2 ..7 10
10 #二进制 0 1 10 11 100
11
12 # v = 11 在计算机里是怎么存的?
13 # ascii 00110001 00110001
14
15 # v1 = 11
16 # data = v1.bit_length()
17 # print(data)
18 #本质上的内部存储:00110001 00110001
19 # 11 ->
20
21 #二进制 八进制 十进制 十六进制
22 # 0 0 0 0
23 # 1 1 1 1
24 # 10 2 2 2
25 # 11 3 3 3
26 # 100 4 4 4
27 # 101 6 6 6
28 # 111 7 7 7
29 # 1000 10 7 8
30 # 1001 11 9 9
31 # 1010 12 10 A
32 # 1011 13 11 B
33 # 1100 14 12 C
34 # 1101 15 13 D
35 # 1110 16 14 E
36 # 1111 17 15 F
37 # 10000 20 16 10
38
39 ########################################1个需要注意
40 v1 = 16
41 #当前十进制用二进制表示时,最少使用的位数
42 data = v1.bit_length()
43 print(data)
44
45 #str
46 v1 = "alex"
47
48 # new_v1 = v1.upper()
49 # print(v1)
50 # print(new_v1)
51
52
53 # new_v1 = v1.capitalize()
54 # print(v1)
55 # print(new_v1)
布尔类脚本:
1 v1 = True # 1
2 v2 = False # 0
整数、布尔值、字符串之间转换脚本:
1 #int 8 9
2 #bool True False
3 #str "sdf" "7" ----只有字符串可以循环取值
4
5
6 #加法计算器
7 # v1 = input("请输入第一个值:")
8 # v2 = input("请输入第二个值:")
9 # v3 = int(v1) + int(v2) # 通过int将字符串转换为整数
10 # print(v3)
11
12 #字符串--> 整数
13
14 # v = True
15 # val = int(v)
16 # print(val)
17
18
19 # v = False
20 # val = int(v)
21 # print(val)
22
23 #布尔值-->整数 int(值)
24 #整数,布尔值----> 字符串 str(值)
25 # 整数,字符串 ----布尔 bool(值)
26 # - 0 False ,其他都为True
27 # - 字符串和空格都为True,只有不填时才为False
28
29 # v = 8
30 # val = str(v)
31 # print(val,type(val))
32
33
34 # v = True
35 # val = str(v)
36 # print(val,type(val))
37
38
39 # v = -1
40 # val = bool(v)
41 # print(val,type(val))
42
43
44 # v = 0
45 # val = bool(v)
46 # print(val,type(val))
47
48
49 # v = "abdcd"
50 # val = bool(v)
51 # print(val,type(val))
52
53
54 # v = " "
55 # val = bool(v)
56 # print(val,type(val))
57
58
59 # v = ""
60 # val = bool(v)
61 # print(val,type(val))
62
63 # 面试题:
64 # a = 1 == 1 or 2 > 3
65 # print(a)
66 #True
67
68 # a = True or 2 > 3
69 # print(a)
70 #True
71
72 # a = False or 2 > 3
73 # print(a)
74 #False
75
76 # a = 0 or 2 > 3
77 # print(a)
78 #False
79
80
81 # a = 9 or 2 > 3
82 # print(a)
83 #9
84
85
86 # a = "asdf" or 2 > 3
87 # print(a)
88 # asdf
89
90 #总结:
91 # - 互相转换原则 类(值)
92 # -布尔值:只有0 ""为False
93 # -a = 9 or 2 > 3
94
95 # a = 0 or 6
96 # print(a)
97 # 6
列表类功能相关脚本:
1 ####################list类中为当前对象提供的功能#####################
2
3 """
4 v = [11,22,33,44,"蒋毅"]
5
6 #1. 在列表尾部追加一个值-----修改了本身的值
7 v.append('李俊义')
8 print(v)
9 """
10
11 """
12 v = []
13 while True:
14 name = input("请输入用户名:")
15 if name == 'q':
16 break
17 v.append(name)
18 print(v)
19 """
20
21 """
22 v = []
23 while True:
24 name = input("请输入用户名:")
25 if name == 'q' or name == "Q":
26 break
27 v.append(name)
28 print(v)
29 """
30
31 """
32 v = []
33 while True:
34 name = input("请输入用户名:")
35 if name.lower() == 'q':
36 break
37 v.append(name)
38 print(v)
39
40 """
41
42 """
43 #2.在列表中间指定位置插入数据----insert
44 v = [11,22,33,44,"蒋毅"]
45 v.insert(4,"孙骑兵")
46 print(v)
47 """
48 #3. 反转
49 """
50 v = [11,22,33,44]
51 #print(v)
52 v.reverse()
53 print(v)
54 """
55
56
57
58
59 #####################公共功能######################
60 #1.通过索引取值----和字符串相同
61 # - v[0]
62 # - v[0:4]
63 # - v[0:4:2]
64 #2.计算长度
65 #2.5 替换或修改
66 # 替换:
67 """
68 v = ["张勤学","成大井","成绩","刘龙华"]
69 v[3] = "吴国胜"
70 print(v)
71 """
72
73 """
74 #删除:
75 v = ["张勤学","成大井","成绩","刘龙华"]
76 del v[3]
77 print(v)
78 """
79
80 """
81 v = ["张勤学","成大井","成绩","刘龙华","ALEX"]
82 del v[3]
83 del v[2]
84 print(v)
85 """
86 """
87 v = ["张勤学","成大井","成绩","刘龙华","ALEX"]
88 del v[2:4]
89 print(v)
90 """
91
92 """
93 v = ["张勤学","成大井","成绩","刘龙华","ALEX"]
94 v[2:4] = "吴国胜"
95 print(v)
96 """
97 """
98 v = ["张勤学","成大井","成绩","刘龙华","ALEX"]
99 v[2:4] = ["吴国胜"]
100 print(v)
101 """
102 """
103 v = ["张勤学","成大井","成绩","刘龙华","ALEX"]
104 v[2:4] = ["吴国胜","狗胜","牛胜"]
105 print(v)
106 """
107
108 #3.for循环
109
110 """
111 v = [11,22,33,44,"蒋毅"]
112 print(v[3])
113
114
115 v = [11,22,33,44,"蒋毅"]
116 val1 = v [3]
117 val2 = v [4]
118
119 val1.bit_length()
120 val2.split("蒋")
121 """
122
123 """
124 v = [11,22,33,44,"蒋毅"]
125 val = v[0:5:2]
126 print(val)
127
128 """
129
130 """
131 v = [11,22,33,44,"蒋毅"]
132 val = len(v)
133 print(val)
134 """
135 """
136 v = [11,22,33,44,"蒋毅"]
137 for i in v:
138 print(i)
139 """
140
141 #练习:
142 """
143 v = ["123","孙骑兵",666]
144 # val = len(v)
145 # print(val)
146 val = v[1][1]
147 print(val)
148 print(v[1])
149 """
150 """
151 #将孙奇兵和666替换为王猛
152 v = ["123","孙骑兵",666]
153 v[1:3] = ["王猛",]
154 print(v)
155 """
156 """
157 #尾部添加王皓林
158 v = ["123","孙骑兵",666]
159 v.append('王皓林')
160 print(v)
161 """
162
163 #补充:
164 #1.列表中元素可以是:数字,字符串,布尔值,另外一个列表
165 """
166 li = [11,22,[6,5,7],33,True,"蒋毅",55]
167 v = len(li)
168 print(v)
169 val = li[2]
170 print(val)
171 """
172 """
173 li = [11,22,[6,"88991"],33,True,"蒋毅",55]
174 val = li[2][1][-2]
175 print(val)
176 """
177
178 """
179 #将33换成66
180 li = [11,22,[6,"88991"],33,True,"蒋毅",55]
181 li[3] = 66
182 print(li)
183 """
184 #将7换成77
185 """
186 li = [11,22,[6,"88991",7],33,True,"蒋毅",55]
187 li[2][2] = 77
188 print(li)
189
190 """
191 #将88991换成666
192 """
193 li = [11,22,[6,"88991",7],33,True,"蒋毅",55]
194 li[2][1] = 666
195 print(li)
196 """
197
198 #字符串中数据替换
199 """
200 v = "蒋毅"
201 v = v.replace('蒋','江')
202 print(v)
203 """
204
205 #将"蒋毅"中的蒋替换为江
206 """
207 li = [11,22,[6,"88991",7],33,True,"蒋毅",55]
208 val = li[5].replace('蒋','江')
209 li[5] = val
210 print(li)
211 """
212 #简写
213 """
214 li = [11,22,[6,"88991",7],33,True,"蒋毅",55]
215 li[5] = li[5].replace('蒋','江')
216 print(li)
217 """
元组类相关脚本:
1 #tuple
2
3 #v = (11,'ffff',22,33,44,)
4
5 ###########tuple 类中为当前对象提供的功能###########
6 #无
7
8 ##########公共功能############
9 #1. 长度
10
11
12 """
13 v = (11,'ffff',22,33,44,)
14 val = len(v)
15 print(val)
16 """
17 #索引取值
18 """
19 v = (11,'ffff',22,33,44,)
20 print(v[0])
21 print(v[1])
22 """
23 #3.for循环
24 """
25 v = (11,'ffff',22,33,44,)
26 for i in v:
27 print(i)
28 """
29
30 #4. 元组也可以嵌套
31 """
32 v = (11,'ffff',22,['蒋毅','二井"'],33,(9,1,2,"alex"),44,)
33 print(v)
34 """
35 """
36 v = (11,'ffff',22,['蒋毅','二井"'],33,(9,1,2,"alex"),44,)
37 v[3][1] = "XXXXX"
38 print(v)
39 """
40
41 #元组的儿子不能替换修改,但元组的孙子可以替换或修改添加
42 v = (11,'ffff',22,['蒋毅','二井"'],33,(9,1,2,"alex"),44,)
43 v[3].append("asdasd")
44 print(v)
字典类功能相关脚本:
1 #####################dict类中为当前对象提供的功能##############
2
3 """
4 v = {
5 "k1":'v1', # 键值对
6 "k2":'v2', # 键值对
7 }
8
9 val = v.get('k1')
10 print(val)
11 #------取k对应的value值
12 """
13
14 """
15 v = {
16 "k1":'v1', # 键值对
17 "k2":'v2', # 键值对
18 }
19
20 val = v.keys()
21 print(val)
22 #------取k的值
23 """
24
25 """
26 v = {
27 "k1":'v1', # 键值对
28 "k2":'v2', # 键值对
29 }
30
31 val = v.values()
32 print(val)
33 #-----取value值
34 """
35
36 """
37 v = {
38 "k1":'v1', # 键值对
39 "k2":'v2', # 键值对
40 }
41
42 val = v.items()
43 print(val)
44 #-----同时取k和的值
45 """
46
47 ##########v.keys() v.values() v.items() 一般不单独使用,而是和for循环一起使用
48
49 # 当根据k获取对应的值不存在时,k不存在默认取值为none
50 """
51 v = {
52 "k1":'v1', # 键值对
53 "k2":'v2', # 键值对
54 }
55
56 val = v.get('k1ffff')
57 print(val)
58 """
59
60 # 当k值不存在时后面指定什么值,key就为什么值
61 """
62 v = {
63 "k1":'v1', # 键值对
64 "k2":'v2', # 键值对
65 }
66
67 val = v.get('k1ffff','9999')
68 print(val)
69 """
70
71 ###################公共功能###############
72 #1.获取字典的长度(键值的个数)
73 """
74 v = {
75 "k1":'v1', # 键值对
76 "k2":'v2', # 键值对
77 }
78 val = len(v)
79 print(val)
80 """
81 #2.索引
82 #不推荐(当k不存在时程序报错),推荐使用get取值
83 """
84 v = {
85 "k1":'v1', # 键值对
86 "k2":'v2', # 键值对
87 }
88 val = v['k1']
89 print(val)
90
91 """
92
93 """
94 v = {
95 "k1":'v1', # 键值对
96 "k2":'v2', # 键值对
97 }
98 val = v.get('k1')
99 print(val)
100 """
101
102 #对字典进行设置值,如果k存在对应的值,则更新值;如果k不存在,则创建键值对
103 """
104 v = {
105 "k1":'v1', # 键值对
106 "k2":'v2', # 键值对
107 }
108 #v['k1'] = 666
109 v['kkk1'] = 666
110 val = v.items()
111 print(val)
112 """
113
114 #字典是无序的,所以不能对字典进行赋值
115
116 #del 删除键值对
117 """
118 v = {
119 "k1":'v1', # 键值对
120 "k2":'v2', # 键值对
121 }
122
123 del v['k1']
124 val = v.items()
125 print(val)
126 """
127
128 #3. for循环
129 """
130 v = {
131 "k1":'v1', # 键值对
132 "k2":'v2', # 键值对
133 }
134 for i in v:
135 print(i)
136 """
137 #默认只列所有的k
138 """
139 v = {
140 "k1":'v1', # 键值对
141 "k2":'v2', # 键值对
142 }
143 for i in v.keys():
144 print(i)
145 """
146
147
148
149
150 #只取value
151 """
152 v = {
153 "k1":'v1', # 键值对
154 "k2":'v2', # 键值对
155 }
156 for i in v.values():
157 print(i)
158 """
159
160 #取完整键值对
161 #方法一
162 """
163 v = {
164 "k1":'v1', # 键值对
165 "k2":'v2', # 键值对
166 }
167 for i in v.keys():
168 print(i,v[i])
169 """
170
171 #分解
172 """
173 v = {
174 "k1":'v1', # 键值对
175 "k2":'v2', # 键值对
176 }
177
178 val = v['k1']
179 print(val)
180 """
181
182
183 #方法二
184 """
185 v = {
186 "k1":'v1', # 键值对
187 "k2":'v2', # 键值对
188 }
189 for k in v.items():
190 print(k)
191 #------取值形式为元组模式
192
193 """
194
195
196 """
197 v = {
198 "k1":'v1', # 键值对
199 "k2":'v2', # 键值对
200 }
201 for k in v.items():
202 print(k[0],k[1])
203 """
204
205 """
206 #更简洁的方法
207 v = {
208 "k1":'v1', # 键值对
209 "k2":'v2', # 键值对
210 }
211 for k,v in v.items():
212 print(k,v)
213 """
214
215 #4. 字典嵌套
216 """
217 v = {
218 "k1":123,
219 "k2":"asdf",
220 "k3":True,
221 "k4":[11,22,33],
222 "k5":(1,2,3),
223 "k6":{
224 'kk1':'vv1',
225 'kk2':'vv2',
226 },
227 'k7':[1,2,(8,6,2),{"k111":'vvv1'},5]
228 }
229 val = v.items()
230 print(val)
231
232 """
233
234 #-----删除其中一个键值对
235 """
236 v = {
237 "k1":123,
238 "k2":"asdf",
239 "k3":True,
240 "k4":[11,22,33],
241 "k5":(1,2,3),
242 "k6":{
243 'kk1':'vv1',
244 'kk2':'vv2',
245 },
246 'k7':[1,2,(8,6,2),{"k111":'vvv1'},5]
247 }
248
249 del v['k6']['kk2']
250 print(v)
251 """
252
253 #---替换掉k7里面的元组数据
254 """
255 v = {
256 "k1":123,
257 "k2":"asdf",
258 "k3":True,
259 "k4":[11,22,33],
260 "k5":(1,2,3),
261 "k6":{
262 'kk1':'vv1',
263 'kk2':'vv2',
264 },
265 'k7':[1,2,(8,6,2),{"k111":'vvv1'},5]
266 }
267 v['k7'][2] = 666
268 print(v)
269 """
270
271 #------在k7的嵌套字典里添加一个k222,vvv2
272 """
273 v = {
274 "k1":123,
275 "k2":"asdf",
276 "k3":True,
277 "k4":[11,22,33],
278 "k5":(1,2,3),
279 "k6":{
280 'kk1':'vv1',
281 'kk2':'vv2',
282 },
283 'k7':[1,2,(8,6,2),{"k111":'vvv1'},5]
284 }
285 v['k7'][3]['k222'] = 'vvv2'
286 print(v)
287 """
288
289 #列表中嵌套字典
290
291 """
292 user_list = [
293 {'name':'老狗','age':18},
294 {'name':'流量','age':66},
295 {'name':'wifi':'age':99},
296 ]
297 """
298 #练习:通过用户输入的姓名和年龄创建字典
299
300 """
301 user_list = [
302 {'name':'老狗','age':18},
303 {'name':'流量','age':66},
304 {'name':'wifi','age':99},
305 ]
306 n = input("请输入姓名:")
307 a = input("请输入年龄:")
308 temp = {}
309 temp['name'] = n
310 temp['age'] = a
311 temp = {'name':n,'age':int(a)}
312 user_list.append(temp)
313 print(user_list)
314 """
315 #或者下面的写法
316
317 """
318 user_list = [
319 {'name':'老狗','age':18},
320 {'name':'流量','age':66},
321 {'name':'wifi','age':99},
322 ]
323 n = input("请输入姓名:")
324 a = input("请输入年龄:")
325 temp = {'name':n,'age':int(a)}
326 user_list.append(temp)
327 print(user_list)
328 """
329
330 #------改进版----使用for循环
331 """
332 user_list = [
333 {'name':'老狗','age':18},
334 {'name':'流量','age':66},
335 {'name':'wifi','age':99},
336 ]
337 n = input("请输入姓名:")
338 a = input("请输入年龄:")
339 temp = {'name':n,'age':int(a)}
340 user_list.append(temp)
341 for item in user_list:
342 print(item)
343 """
344
345
346 #----再次改进
347 """
348 user_list = [
349 {'name':'老狗','age':18},
350 {'name':'流量','age':66},
351 {'name':'wifi','age':99},
352 ]
353 n = input("请输入姓名:")
354 a = input("请输入年龄:")
355 temp = {'name':n,'age':int(a)}
356 user_list.append(temp)
357 for item in user_list:
358 print(item['name'],item['age'])
359 """