入门python-TextProBarV2.py 文本进度条,动态刷新完整版

加入了计时功能，和center的运用使得两边同时假如等长的字符串

#TextProBarV2.py 文本进度条,动态刷新完整版
import time
scale = 50
print("执行开始".center(scale//2,"-"))
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(0.1)
print("\n"+"执行结束".center(scale//2,'-'))