1 #!/user/bin/env python
2 # -*- coding:utf-8 -*-
3
4 """
5 Container:
6 List:
7 Establish
8 Content Access
9 Built-In Function
10 Add
11 append()
12 extend(iterable)
13 insert(index, object)
14
15 Delete
16 remove(object)
17 pop([index])
18 Remove and return item at index (default last).
19 clear()
20 del
21 numbers = [1, 2, 3, 5, 6, 7]
22 del numbers[3]
23 # >>> [1, 2, 3, 6. 7]
24
25 del numbers
26 NameError: name 'numbers' is not defined
27
28 Modify and Find
29 numbers = [1, 2, 3, 4, 5]
30 numbers[numbers.index(3)] = 4
31 # >>> [1, 2, 4, 4, 5]
32
33 else
34 string = numbers.copy()
35 Shallow Copy : Return a new address, that the contents are the same as before
36 Copy the parent object, not the child object inside the object
37 # >>> numbers[1, 2, 3, 4, 5]
38 # >>> string[1, 2,, 3, 4, 5]
39 # >>> id(numbers) 3891784
40 # >>> id(string) 3891848
41
42 numbers = [1, 2, 3, 4, 5]
43 new_numbers = numbers[:3]
44 # >>> id(numbers) 31131720
45 # >>> id(new_numbers) 31131784
46
47
48 numbers.count()
49 numbers = [1, 1, 3, 5, 5, 5, 5]
50 numbers.count(5)
51 # >>> 4
52
53 list-Supported operators :
54 + * [] in is
55
56 Operational-related system Built-in Function :
57 numbers = [1, 3, 5, 7, 9]
58 # >>> sum(numbers) 25
59 # >>> min(numbers) 1
60 # >>> max(numbers) 9
61 # >>> sorted(numbers) [1, 3, 5, 7, 9]
62 # >>> sorted(numbers, reverse=True) [9, 7, 5, 3, 1]
63
64 Tuple:
65 Establish
66 numbers = (1, )
67 Content Access
68 numbers = (1, 3, 5, 7, 9)
69 # >>> numbers[2]
70 # >>> 5
71 # >>> numbers[-2]
72 # >>> 7
73 # >>> numbers[:3]
74 # >>> (1, 3, 5)
75 Built-In Function
76 Do not support (add, delete, modify) :
77 tuple->list->tuple
78 find :
79 tuple.index()
80 tuple.count()
81
82 sorted(numbers) # >>> [1, 3, 5, 7, 9]
83 # >>> type(numbers)
84 # >>> <class 'list'>
85
86 list-Supported operators :
87 + * [] in is
88
89 Set : Disorder and without repetition
90 Establish
91 numbers = set()
92 numbers = {1, 2, 3}
93 Content Access
94 Built-In Function
95 add :
96 numbers.add(object)
97 numbers.update(Iterable)
98 delete
99 numbers.remove(object)
100 numbers.discard(object)
101 numbers.pop()
102 numbers.clear()
103 Do not support (modify and find)
104 else :
105 for index, value in enumerate(numbers):
106 print(index, value)
107 # >>> 0 1
108 # >>> 1 2
109 # >>> 2 3
110
111 list-Supported operators :
112 in is
113 set operation : & numbers.intersection(object)
114 numbers.intersection_update(object)
115 | numbers.union(object)
116 - numbers.difference(object)
117 ^ numbers.symmetric_different(object)
118 numbers.symmetric_different_update(object)
119
120 Dict
121 Establish
122 dictionary = {}
123 dictionary = dict()
124 Content Access
125 dictionary = {"GeBiCunGaHa": 21, "YeYuanXinZhiZhu": 5}
126 dictionary["GeBiCunGaHa"]
127 # >>> 21
128 if key does not exist, Throw out KeyError
129 dictionary.get(GeBiCunGaHa")
130 # >>> 21
131 dictionary.get("TieBiATongMu")
132 # >>> None
133 dictionary.get("TieBiATongMu", 10)
134 # >>> 10
135 Built-In Function
136 add
137 dictionary["TieBiATongMu"] = 18
138 delete
139 dictionary.pop("TieBiATongMu") Remove "TieBiATongMu" from maps[0] and return its value.
140 dictionary.popitem() remove and return some (key, value) pair as a 2-tuple
141 dictionary.clear()
142 del dictionary["TieBiATongMu"]
143 del dictionary
144 modify
145 dictionary["GeBiCunGaHa"] = 25
146 Do not support (find)
147 else :
148 dict.fromkeys(["one", "two", "three"], 100)
149 # >>> {'one': 100, 'two': 100, 'three': 100}
150
151 dictionary.keys()
152 # >>> dict_keys(['GeBiCunGaHa', 'YeYuanXinZhiZhu'])
153 dictionary.values()
154 # >>> dict_values([21, 5])
155 dictionary.items()
156 # >>> dict_items([('GeBiCunGaHa', 21), ('YeYuanXinZhiZhu', 5)])
157 dict-Supported operators :
158 in
159 for element in dictionary:
160 print(element)
161 # >>> "GeBiCunGaHa"
162 # >>> "YeYuanXinZhiZhu"
163 is
164
165 """
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