yun@dicom

 1 import random
 2 import copy
 3 
 4 lst = [-2, -1, 0, 1, 2, 3]
 5 
 6 def choice_1 (trials):
 7 
 8     total = 0
 9     found = 0.0
10 
11     while total < trials:
12         A1 = random.choice (lst)
13         lstbk = copy.deepcopy (lst)
14         lstbk.remove (A1)
15         A2 = random.choice (lstbk)
16         if (A1 == 0 or A2 == 0):
17             found += 1.0
18         total += 1
19 
20     print (found/total)
21 
22 
23 def choice_2 (trials):
24 
25     total = 0
26     found = 0.0
27 
28     while total < trials:
29         A1 = random.choice (lst)
30         A2 = random.choice (lst)
31         if (A1 == A2):
32             continue
33         if (A1 == 0 or A2 == 0):
34             found += 1.0
35         total += 1
36 
37     print (found/total)
38 
39 def choice_3 (trials):
40 
41     total = 0
42     found = 0.0
43 
44     while total < trials:
45         R = random.sample (lst, 2)
46         if (R[0] == 0 or R [1] == 0):
47             found += 1.0
48         total += 1
49 
50     print (found/total)
51 
52 choice_3 (102400)
53 choice_2 (102400)
54 choice_1 (102400)
55 choice_3 (102400)
56 choice_2 (102400)
57 choice_1 (102400)