短代码：进度表

短代码：进度表(坑人的MOOC)

import time
scale = 50
print("执行开始".center(scale//2,"-")) #输出第一行
start = time.perf_counter()
for i in range(scale+1):
    a = '*'* i
    b = '.'* (scale - i)
    c = (i/scale)*100
    dur = time.perf_counter() - start
    print("\r{:^3.0f}%[{}->{}]{:.2f}s".format(c,a,b,dur),end="")
    time.sleep(0.5)
print("\n"+"执行结束".center(scale//2,'-'))

输出格式是值得借鉴的，但其意义不算大！！！