python实例---文本进度条

version 1

#textprobarv1.py
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------")

version 2
单行动态刷新
key：\r 刷新

#textprobarv1.py
import time
for i in range(101):
    print("\r{:3}%".format(i),end="")
    time.sleep(0.2)

version3

#textprobarv1.py
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,'-'))