python - 在 Python 中同时在控制台中打印 2 行

Question

我正在使用 Python 3 在控制台中输出 2 个进度条，如下所示:

100%|###############################################|       
 45%|######################                         |

两个条在不同的线程中同时增长。

线程操作很好，两个进度条都在完成它们的工作，但是当我想打印它们时，它们在控制台的一行上彼此重叠打印。我只有一行进度条，它交替显示这两个进度条。

有什么方法可以让这些进度条同时在不同的行上增长？

Answer 1

您需要一个 CLI 框架。如果您在 Unix 上工作，Curses 是完美的选择(并且可以在此处找到适用于 Windows 的端口:https://stackoverflow.com/a/19851287/1741450)

import curses
import time
import threading

def show_progress(win,X_line,sleeping_time):

    # This is to move the progress bar per iteration.
    pos = 10
    # Random number I chose for demonstration.
    for i in range(15):
        # Add '.' for each iteration.
        win.addstr(X_line,pos,".")
        # Refresh or we'll never see it.
        win.refresh()
        # Here is where you can customize for data/percentage.
        time.sleep(sleeping_time)
        # Need to move up or we'll just redraw the same cell!
        pos += 1
    # Current text: Progress ............... Done!
    win.addstr(X_line,26,"Done!")
    # Gotta show our changes.
    win.refresh()
    # Without this the bar fades too quickly for this example.
    time.sleep(0.5)

def show_progress_A(win):
    show_progress( win, 1, 0.1)

def show_progress_B(win):
    show_progress( win, 4 , 0.5)

if __name__ == '__main__':
    curses.initscr()


    win = curses.newwin(6,32,14,10)
    win.border(0)
    win.addstr(1,1,"Progress ")
    win.addstr(4,1,"Progress ")
    win.refresh()

    threading.Thread( target = show_progress_B, args = (win,) ).start()
    time.sleep(2.0)
    threading.Thread( target = show_progress_A, args = (win,)).start()