Python os.pipe() Method with example

Hello dear readers! Welcome back to another section of our tutorial on Python. In this tutorial guide, we are going to be studying about the Os pipe() method.

The Python's os pipe() creates a pipe and then returns a pair of file descriptors (r, w) that is usable for reading and writing, respectively.

Syntax

The following below is the syntax for Python Os pipe() method -

os.pipe( )

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Parameter Details

• NA

Return Value

This method  returns a pair of the file descriptors.

Example

The following below is a simple example -

#!/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..."

# 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)

Output

When the above code is executed, it will produce the following result -

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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Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the Python OS popen() Method.

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