Python之路----------random模块

import random

#随机小数
print(random.random())
#随机整数
print(random.randint(1,5))#他会打印5
#随机整数
print(random.randrange(1,5))#他永远不会打印5

 1 import string
 2 
 3 print(string.letters)
 4 #abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
 5 print(string.digits)
 6 #0123456789
 7 print(string.ascii_letters)
 8 #abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
 9 
10 #方式一
11 str_source = string.ascii_letters+string.digits
12 print(‘‘.join(random.sample(str_source,4)))
13 
14 #方式二
15 
16 checkcode = ‘‘
17 for i in range(6):
18     current = random.randrange(0,6)
19     if current != i :
20         temp = chr(random.randint(65, 90))
21     else:
22         temp = random.randint(0,9)
23 
24     checkcode += str(temp)
25 
26 print(checkcode)