pipe() 方法創建一個管道，並返回一對檔描述符(r, w)可用的用於讀取和寫入，
語法
以下是 pipe() 方法的語法：
os.pipe()
參數
-
NA
返回值
該方法返回一對檔描述符。
示例
下麵的示例顯示 pipe() 方法的使用。
#!/usr/bin/python3
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()
if processid:
# This is the parent process
# Closes file descriptor w
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)
當我們運行上面的程式，它會產生以下結果：
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...
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