print执行语句之后,光标不跳到下一行,用'\r'让光标退回到本行开头
用新一次打印的字符覆盖之前字符,完成在同一行刷新进度条目的
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,"-"))