day12-python之深灰魔法

#######################################灰魔法: list類中提供的方法   列表#######################################

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 
 4 
 5 # 參數
 6 # 1. 原來值最後追加
 7 # 對象.方法(..)   # li對象調用append方法
 8 li = [11, 22, 33, 22, 44]
 9 # li.append(5)
10 # li.append("alex")
11 # li.append([1234,2323])
12 # print(li)
13 
14 # 2 清空列表
15 # li.clear()
16 # print(li)
17 
18 # 3 拷貝，淺拷貝
19 # v = li.copy()
20 # print(v)
21 
22 # 4. 計算元素出現的次數
23 # v = li.count(22)
24 # print(v)
25 
26 # 5. 擴展原列表，參數：可迭代對象
27 # li = [11, 22, 33, 22, 44]
28 # li.append([9898,"不得了"])
29 # print(li)
30 #
31 # li.extend([9898,"不得了"])
32 # for i in [9898,"不得了"]:
33 #     li.append(i)
34 #
35 # li.extend("不得了")
36 # print(li)
37 
38 # 6. 根據值獲取當前值索引位置（左邊優先）
39 # li = [11, 22, 33, 22, 44]
40 # v= li.index(22)
41 # print(v)
42 
43 # 7. 在指定索引位置插入元素
44 # li = [11, 22, 33, 22, 44]
45 # li.insert(0,99)
46 # print(li)
47 
48 # 八、 刪除某個值(1.指定索引；2. 默認最後一個)，並獲取刪除的值
49 # li = [11, 22, 33, 22, 44]
50 # v = li.pop()
51 # print(li)
52 # print(v)
53 
54 # li = [11, 22, 33, 22, 44]
55 # v = li.pop(1)
56 # print(li)
57 # print(v)
58 
59 # 9. 刪除列表中的指定值，左邊優先
60 # li = [11, 22, 33, 22, 44]
61 # li.remove(22)
62 # print(li)
63 # PS: pop remove del li[0]    del li[7:9]   clear
64 
65 # 10 將當前列表進行翻轉
66 # li = [11, 22, 33, 22, 44]
67 # li.reverse()
68 # print(li)
69 
70 # 11 列表的排序
71 # li = [11,44, 22, 33, 22]
72 # li.sort()
73 # li.sort(reverse=True)
74 # print(li)
75 ### 欠
76 # cmp
77 # key
78 # sorted

# 1. 列表格式
# 2. 列表中能夠嵌套任何類型
# 中括號括起來
# ，分割每一個元素
# 列表中的元素能夠是 數字，字符串,列表，布爾值..全部的都能放進去
# 「集合」，內部放置任何東西

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 
 4 
 5 # 3.
 6 # 索引取值
 7 li = [1,23,212,45,67,89]
 8 # print(li[3])
 9 # 4 切片，切片結果也是列表
10 # print(li[3:-1])
11 
12 # 5 for循環
13 # while循環
14 # for item in li:
15 #     print(item)
16 
17 # 列表元素，能夠被修改
18 
19 # li = [1, 12, 9, "age", ["石振文", ["19", 10], "龐麥郎"], "alex", True]
20 # print(li)
21 
22 ############## 6 索引
23 # 修改
24 # li[1] = 120
25 # print(li)
26 # li[1] = [11,22,33,44]
27 # print(li)
28 
29 # 刪除,第一種方式
30 # print(li)
31 # del li[1]
32 # print(li)
33 
34 ############## 7 切片
35 # 修改
36 # print(li)
37 # li[1:3] = [120,90]
38 # print(li)
39 
40 # 刪除
41 # print(li)
42 # del li[2:6]
43 # print(li)
44 
45 # 8 in 操做
46 # li = [1, 12, 9, "age", ["石振文", ["19", 10], "龐麥郎"], "alex", True]
47 # v1 = "石振文" in li
48 # print(v1)
49 # v2 = "age" in li
50 # print(v2)
51 ###### 列表中的元素，
52 
53 # 9 操做
54 # li = [1, 12, 9, "age", ["石振文", ["19", 10], "龐麥郎"], "alex", True]
55 # print(li[4][1][0])
56 
57 # 10 轉換
58 # 字符串轉換列表   li =  list("asdfasdfasdf"), 內部使用for循環
59 # s = "pouaskdfauspdfiajsdkfj"
60 # new_li = list(s)
61 # print(new_li)
62 
63 # 列表轉換成字符串，
64 # 須要本身寫for循環一個一個處理： 既有數字又有字符串
65 # li = [11,22,33,"123","alex"]
66 # r = str(li) # '[11,22,33,"123","alex"]'
67 # print(r)
68 # s = ""
69 # for i in li:
70 #     s = s + str(i)
71 # print(s)
72 
73 # 直接使用字符串join方法：列表中的元素只有字符串
74 # li = ["123","alex"]
75 # v = "".join(li)
76 # print(v)
77 
78 ### 補充：字符串建立後，不可修改
79 # v = "alex"
80 # v = v.replace('l','el')
81 # print(v)
82 
83 # li = [11,22,33,44]
84 # li[0]
85 # li[0] = 999
86 
87 # s = "alex"
88 # li[0]
89 # s[0] = "E"
90 # print(s)
91 # 列表，有序；元素能夠被修改

#########################################元組###########################################################

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 
 4 
 5 # 元組，元素不可被修改，不能被增長或者刪除
 6 # tuple
 7 # tu = (11,22,33,44,22,22,22)
 8 # print(tu.count(22))#獲取指定元素在元組中出現的次數
 9 # print(tu.index(22))
10 
11 # 1. 書寫格式
12 tu = (111,"alex",(11,22),[(33,44)],True,33,44,)
13 # 通常寫元組的時候，推薦在最後加入 ,
14 # 元素不可被修改，不能被增長或者刪除
15 
16 # 2. 索引
17 # v = tu[0]
18 # print(v)
19 
20 # 3. 切片
21 # v = tu[0:2]
22 # print(v)
23 
24 # 4. 能夠被for循環，可迭代對象
25 # for item in tu:
26 #     print(item)
27 
28 # 5. 轉換
29 s = "asdfasdf0"
30 li = ["asdf","asdfasdf"]
31 tu = ("asdf","asdf")
32 
33 # v = tuple(s)
34 # print(v)
35 
36 # v = tuple(li)
37 # print(v)
38 
39 # v = list(tu)
40 # print(v)
41 
42 # v = "_".join(tu)
43 # print(v)
44 
45 # li = ["asdf","asdfasdf"]
46 # li.extend((11,22,33,))
47 # print(li)
48 
49 # 6.元組的一級元素不可修改/刪除/增長
50 tu = (111,"alex",(11,22),[(33,44)],True,33,44,)
51 # # 元組，有序。
52 # v = tu[3][0][0]
53 # print(v)
54 # v=tu[3]
55 # print(v)
56 # tu[3][0] = 567
57 # print(tu)

###################字典######################

  1 #!/usr/bin/env python
  2 # -*- coding:utf-8 -*-
  3 
  4 
  5 dic = {
  6     "k1": 'v1',
  7     "k2": 'v2'
  8 }
  9 # 1 根據序列，建立字典，並指定統一的值
 10 # v = dict.fromkeys(["k1",123,"999"],123)
 11 # print(v)
 12 
 13 # 2 根據Key獲取值，key不存在時，能夠指定默認值（None）
 14 # v = dic['k11111']
 15 # print(v)
 16 # v = dic.get('k1',111111)
 17 # print(v)
 18 
 19 # 3 刪除並獲取值
 20 # dic = {
 21 #     "k1": 'v1',
 22 #     "k2": 'v2'
 23 # }
 24 # v = dic.pop('k1',90)
 25 # print(dic,v)
 26 # k,v = dic.popitem()
 27 # print(dic,k,v)
 28 
 29 # 4 設置值，
 30 # 已存在，不設置，獲取當前key對應的值
 31 # 不存在，設置，獲取當前key對應的值
 32 # dic = {
 33 #     "k1": 'v1',
 34 #     "k2": 'v2'
 35 # }
 36 # v = dic.setdefault('k1111','123')
 37 # print(dic,v)
 38 
 39 # 5 更新
 40 # dic = {
 41 #     "k1": 'v1',
 42 #     "k2": 'v2'
 43 # }
 44 # dic.update({'k1': '111111','k3': 123})
 45 # print(dic)
 46 # dic.update(k1=123,k3=345,k5="asdf")
 47 # print(dic)
 48 
 49 # 6 keys()  7 values()   8 items()   get   update
 50 ##########
 51 
 52 
 53 
 54 # 一、基本機構
 55 # info = {
 56 #     "k1": "v1", # 鍵值對
 57 #     "k2": "v2"
 58 # }
 59 #### 2 字典的value能夠是任何值
 60 # info = {
 61 #     "k1": 18,
 62 #     "k2": True,
 63 #     "k3": [
 64 #         11,
 65 #         [],
 66 #         (),
 67 #         22,
 68 #         33,
 69 #         {
 70 #             'kk1': 'vv1',
 71 #             'kk2': 'vv2',
 72 #             'kk3': (11,22),
 73 #         }
 74 #     ],
 75 #     "k4": (11,22,33,44)
 76 # }
 77 # print(info)
 78 
 79 ####  3 列表、字典不能做爲字典的key
 80 # info ={
 81 #     1: 'asdf',
 82 #     "k1": 'asdf',
 83 #     True: "123",
 84 #     # [11,22]: 123,
 85 #     (11,22): 123,
 86 #     # {'k1':'v1'}: 123
 87 #
 88 # }
 89 # print(info)
 90 
 91 # 4 字典無序
 92 
 93 # info = {
 94 #     "k1": 18,
 95 #     "k2": True,
 96 #     "k3": [
 97 #         11,
 98 #         [],
 99 #         (),
100 #         22,
101 #         33,
102 #         {
103 #             'kk1': 'vv1',
104 #             'kk2': 'vv2',
105 #             'kk3': (11,22),
106 #         }
107 #     ],
108 #     "k4": (11,22,33,44)
109 # }
110 # print(info)
111 
112 # 五、索引方式找到指定元素
113 # info = {
114 #     "k1": 18,
115 #     2: True,
116 #     "k3": [
117 #         11,
118 #         [],
119 #         (),
120 #         22,
121 #         33,
122 #         {
123 #             'kk1': 'vv1',
124 #             'kk2': 'vv2',
125 #             'kk3': (11,22),
126 #         }
127 #     ],
128 #     "k4": (11,22,33,44)
129 # }
130 # v = info['k1']
131 # print(v)
132 # v = info[2]
133 # print(v)
134 # v = info['k3'][5]['kk3'][0]
135 # print(v)
136 
137 # 6 字典支持 del 刪除
138 # info = {
139 #     "k1": 18,
140 #     2: True,
141 #     "k3": [
142 #         11,
143 #         [],
144 #         (),
145 #         22,
146 #         33,
147 #         {
148 #             'kk1': 'vv1',
149 #             'kk2': 'vv2',
150 #             'kk3': (11,22),
151 #         }
152 #     ],
153 #     "k4": (11,22,33,44)
154 # }
155 # del info['k1']
156 #
157 # del info['k3'][5]['kk1']
158 # print(info)
159 
160 # 7 for循環
161 # dict
162 info = {
163     "k1": 18,
164     2: True,
165     "k3": [
166         11,
167         [],
168         (),
169         22,
170         33,
171         {
172             'kk1': 'vv1',
173             'kk2': 'vv2',
174             'kk3': (11,22),
175         }
176     ],
177     "k4": (11,22,33,44)
178 }
179 # for item in info:
180 #     print(item)
181 #
182 # for item in info.keys():
183 #     print(item)
184 #
185 # for item in info.values():
186 #     print(item)
187 
188 # for item in info.keys():
189 #     print(item,info[item])
190 
191 # for k,v in info.items():
192 #     print(k,v)
193 
194 # True 1  False 0
195 # info ={
196 #     "k1": 'asdf',
197 #     True: "123",
198 #     # [11,22]: 123
199 #     (11,22): 123,
200 #     # {'k1':' v1'}: 123
201 #
202 # }
203 # print(info)

#######################　整理 #################

# 1、數字
# int(..)
# 2、字符串
# replace/find/join/strip/startswith/split/upper/lower/format
# tempalte = "i am {name}, age : {age}"
# # v = tempalte.format(name='alex',age=19)
# v = tempalte.format(**{"name": 'alex','age': 19})
# print(v)
# 3、列表
# append、extend、insert
# 索引、切片、循環
# 4、元組
# 忽略
# 索引、切片、循環 以及元素不能被修改
# 5、字典
# get/update/keys/values/items
# for,索引

# dic = {
# "k1": 'v1'
# }

# v = "k1" in dic
# print(v)

# v = "v1" in dic.values()
# print(v)
# 6、布爾值
# 0 1
# bool(...)
# None "" () [] {} 0 ==> False