无涯教程-OS File - os.pipe()函数

Python方法Pipe()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

os.pipe() - 语法

os.pipe()

os.pipe() - 返回值

此方法返回一对文件描述符。

os.pipe() - 示例

以下示例显示了Pipe()方法的用法。

#!/usr/bin/python
import os, sys
print "The child will write text to a pipe and "
print "the parent will read the text written by child..."
# 文件描述符 r, w 用于读写
r, w=os.pipe()
processid=os.fork()
if processid:
# 这是父进程关闭文件描述符 w
os.close(w)
r=os.fdopen(r)
print "Parent reading"
str=r.read()
print "text =", str

sys.exit(0)
else:
# 这是子进程
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)

当无涯教程运行上面的程序时，它产生以下输出-

The child will write text to a pipe and
the parent will read the text written by child...
Parent reading
Child writing
Child closing
text=Text written by child...

参考链接

www.learnfk.com/python/os-p…