python实现文本进度条 程序进度条 加载进度条 单行刷新功能

import time
tm=10
print('{:-^18}'.format('开始'))
for i in range(tm+1):
  a='#'*i
  b='.'*(tm-i)
  c=(i/tm)*100
  print('\r{:^3.0f}%[{}->{}]'.format(c,a,b),end="")#记得要光标回退,这是python3的打法，python2的把最后的end=‘'改了就好
  time.sleep(0.1)#这是模拟程序进程，可将time.sleep替换成程序进程
print('{:-^18}'.format('结束'))

--------开始--------
 0 %[->..........]
10 %[#->.........]
20 %[##->........]
30 %[###->.......]
40 %[####->......]
50 %[#####->.....]
60 %[######->....]
70 %[#######->...]
80 %[########->..]
90 %[#########->.]
100%[##########->]
--------结束--------

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,"-"))