import math import time scale=20 t=time.process_time() for i in range(scale+1): a,b=‘**‘*i,‘..‘*(scale-i) c=(i/scale)*100 π=4*(4*math.atan(1/5)-math.atan(1/239)) print("%[{:3}{}->{}]".format(a,b,c)) time.sleep(0.1) print(π) print("{:.2f}s".format(t)) print("执行结束")
原文：https://www.cnblogs.com/ikome/p/12611733.html
