1 # -*- coding:utf-8 -*-
2 #整数、浮点数、字符串、布尔值、空值None、列表、字典、集合
3 print(type(int('11111')))
4 print(type(11111111111111111111111))
5 print(type(11111111111.11111111111111111111))
6 print(4/2,9/3)
7
8 print(r'''i'am ok "{a}\t \\\\''' . format(a = 5)) #r表示不转义看到是啥就是啥
9 # 在计算机内存中，str统一使用Unicode编码，当需要保存到硬盘或者需要传输的时候，就编码为UTF-8编码。
10 print('123文档')
11 print(b'\xe4\xb8\xad'.decode('utf-8').encode('utf-8'))#byte类型的每个字符都只占用一个字节。传输、保存到文件的类型
12 print(b'123\xe6\x96\x87\xe6\xa1\xa3'.decode('utf-8'))
13 print(b'123\xe6\x96\x87\xe6\xa1\xe6\x96\x87'.decode('utf-8', errors='ignore'))#忽略部分错误
14 print(type('中文'))
15 print(len('中文'))#字节数 6
16 str = 'abc'
17 print(str.replace("a","AB"))
18 print(str)
19
20
21 print(type(True),type(False)) #and or not
22 print(type(None))
23 list1 = [4,1,2,5,-8] #有序
24 print(type(list1))
25 print(len(list1))
26 list1.insert(1,'insert')
27 list1.append('append')
28 print(list1)
29 print(list1.pop()) #append
30 arr = [2,-9,5,1]
31 arr.sort()
32 print(arr)
33
34 dict1 = {'name':'覃佳','age':18}
35 print(type(dict1))
36 print(dict1['name'])
37 print('name' in dict1)
38 print('sex' in dict1)
39 print(dict1.get('name'))
40 print(dict1.get('sex',-1))
41 del dict1['name']
42 print(dict1)
43 print(dict1.pop('age'))
44 print(dict1)
45
46 print(set([5,5,1,1,2,2,3,4]))#唯一、无序
47
48 age = 6
49 if age > 18:
50 print('adult')
51 elif age > 6:
52 print('teenager')
53 else:
54 print('kid')
55
56 sum = 0
57 for i in range(0,101):
58 sum += i
59 print(sum)
60 print(type(range(1,100)))
61
62 sum = 0
63 n = 0
64 while n < 10:
65 n += 1
66 print(n)
67 if n > 7:
68 break
69 if n % 2 == 0:
70 continue
71 sum += n
72 print(n)
73 print("///",sum,n)
