Python非阻塞控制台输入 [英] Python nonblocking console input

问题描述

我正在尝试用Python创建一个简单的IRC客户端(这是我学习该语言时的一个项目).

I am trying to make a simple IRC client in Python (as kind of a project while I learn the language).

我有一个循环，用于接收和解析IRC服务器发送给我的内容，但是如果我使用raw_input输入内容，它将停止循环，直到我输入(显然)为止.

I have a loop that I use to receive and parse what the IRC server sends me, but if I use raw_input to input stuff, it stops the loop dead in its tracks until I input something (obviously).

如何在不停止循环的情况下输入内容?

How can I input something without the loop stopping?

谢谢.

(我认为我不需要发布代码，我只想输入一些内容，而不会停止 while 1 循环.)

(I don't think I need to post the code, I just want to input something without the while 1 loop stopping.)

我在Windows上.

I'm on Windows.

推荐答案

仅对于Windows控制台，请使用

For Windows, console only, use the msvcrt module:

import msvcrt

num = 0
done = False
while not done:
    print(num)
    num += 1

    if msvcrt.kbhit():
        print "you pressed",msvcrt.getch(),"so now i will quit"
        done = True

对于Linux，此文章描述以下解决方案，它需要termios模块:

For Linux, this article describes the following solution, it requires the termios module:

import sys
import select
import tty
import termios

def isData():
    return select.select([sys.stdin], [], [], 0) == ([sys.stdin], [], [])

old_settings = termios.tcgetattr(sys.stdin)
try:
    tty.setcbreak(sys.stdin.fileno())

    i = 0
    while 1:
        print(i)
        i += 1

        if isData():
            c = sys.stdin.read(1)
            if c == '\x1b':         # x1b is ESC
                break

finally:
    termios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_settings)

对于跨平台，或者如果您还需要GUI，则可以使用Pygame:

For cross platform, or in case you want a GUI as well, you can use Pygame:

import pygame
from pygame.locals import *

def display(str):
    text = font.render(str, True, (255, 255, 255), (159, 182, 205))
    textRect = text.get_rect()
    textRect.centerx = screen.get_rect().centerx
    textRect.centery = screen.get_rect().centery

    screen.blit(text, textRect)
    pygame.display.update()

pygame.init()
screen = pygame.display.set_mode( (640,480) )
pygame.display.set_caption('Python numbers')
screen.fill((159, 182, 205))

font = pygame.font.Font(None, 17)

num = 0
done = False
while not done:
    display( str(num) )
    num += 1

    pygame.event.pump()
    keys = pygame.key.get_pressed()
    if keys[K_ESCAPE]:
        done = True

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