简单进度条

import time
scale=10
print("-------执行开始--------")
for i in range(scale+1):
a='**'i
b='..'(scale-i)
c=(i/scale)*100
print("{:^3.0f}%[{}->{}]".format(c,a,b))
time.sleep(0.1)
print("-------执行结束--------")