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%|######################                         |

两个条都在不同的线程中同时增长.

线程操作很好,两个进度条都在执行它们的工作,但是当我想要打印它们时,它们在控制台的一行上打印在彼此的顶部.我只有一个行进度条,它在显示这两个进度条之间交替显示.

这些进度条是否可以同时在不同的行上增长？

Answer 1

您需要一个 CLI 框架。Curses如果您在 Unix 上工作，那么这是完美的（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()