终端python 2.7上同一位置的动态更新文本

Question

我的程序是用 Python 2.7 编写的，我想做一个动态更新。输出是表格视图，有数百个字符。我找到了一个非常好的答案here，但是，它粉碎了 100 多个字符（如文章中所承诺的那样）。而且，我不知道表格有多少行，它是动态变化的。此外，我不想使用诅咒，因为我希望输出在控制台中内联，就像运行“常规”命令一样

输出示例：

+------+--------------+-------------+
| Type |  IP Address  |    Status   |
+------+--------------+-------------+
|  aa  | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
| cccc | 10.11.10.10  | in Progress |
|  aa  | 10.11.10.10  | in Progress |
|  aa  | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
| cccc | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
+------+--------------+-------------+

我试图避免：

+------+--------------+-------------+
| Type |  IP Address  |    Status   |
+------+--------------+-------------+
|  aa  | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
| cccc | 10.11.10.10  | in Progress |
|  aa  | 10.11.10.10  | in Progress |
|  aa  | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
| cccc | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
+------+--------------+-------------+
+------+--------------+-------------+
| Type |  IP Address  |    Status   |
+------+--------------+-------------+
|  aa  | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
| cccc | 10.11.10.10  | in Progress |
|  aa  | 10.11.10.10  | in Progress |
|  aa  | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
| cccc | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
+------+--------------+-------------+
+------+--------------+-------------+
| Type |  IP Address  |    Status   |
+------+--------------+-------------+
|  aa  | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
| cccc | 10.11.10.10  | in Progress |
|  aa  | 10.11.10.10  | in Progress |
|  aa  | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
| cccc | 10.11.10.10  | in Progress |
|  bb  | 10.11.10.10  | in Progress |
+------+--------------+-------------+

Answer 1

您可以使用 ANSI 代码向上移动多行。它应该在linux中工作：

import time
import sys

for i in range(0, 100):
  # print 4 lines
  print ("line 1\nline 2\nline 3")
  print (str(i))
  time.sleep(0.2)
  sys.stdout.write("\033[4A") # go up 4 lines

它适用于某些终端。它在 Windows 腻子中工作。如果您在腻子终端中返回多于行数，它不会让您向上滚动文本，它会将光标移动到第一个可见行。 Source of the ANSII code.