有进度条的圆周率计算

 1 import time
 2 from random import random
 3 DARTS = 1000*1000
 4 hits = 0.0
 5 for i in range(1, DARTS+1):
 6     x, y = random(), random()
 7     dist = pow(x ** 2 + y ** 2, 0.5)
 8     if dist <= 1.0:
 9         hits = hits + 1
10 pi = 4 * (hits/DARTS)
11 scale = 50
12 print("执行开始".center(scale//2, "-"))
13 start = time.perf_counter()
14 for i in range(scale+1):
15     a = ‘*‘ * i
16     b = ‘.‘ * (scale - i)
17     c = (i/scale)*100
18     dur = time.perf_counter() - start
19     print("\r计算中：{:^3.0f}%[{}->{}]{:.2f}s".format(c,a,b,dur),end=‘‘)
20     time.sleep(0.1)
21 print("圆周率值是: {}".format(pi))
22 print("\n"+"执行结束".center(scale//2,‘-‘))