os.pipe()函数在Python中做什么?
os.pipe()方法创建一个管道并返回一对分别可用于读取和写入的文件描述符(r,w)。
示例
import os, sys print "The child will write text to a pipe and " print "the parent will read the text written by child..." # file descriptors r, w for reading and writing r, w = os.pipe() processid = os.fork() # This is the parent process if processid: os.close(w) r = os.fdopen(r) print "Parent reading" str = r.read() print "text =", str sys.exit(0) else: # This is the child process os.close(r) w = os.fdopen(w, 'w') print "Child writing" w.write("Text written by child...") w.close() print "Child closing" sys.exit(0)
输出结果
您将获得输出:
Parent reading Child writing Child closing text = Text written by child...