Python os.pipe() Method

1. Syntax of the os.pipe() Method
2. Example Codes: Working With the os.pipe() Method in Python
3. Example Codes: Understanding the os.pipe() Method in Python

The os.pipe() method is an efficient way of transferring information from one process to another through a pipe. The pipe is uni-directional, and the information passed is held by the OS until the intended process receives it.

Syntax of the os.pipe() Method

os.pipe()

Parameters

This method does not take any parameters.

Return

This method returns a set of file descriptors (r, w) that can be used for reading and writing.

Example Codes: Working With the os.pipe() Method in Python

import os

r, w = os.pipe()

pid = os.fork()

if pid > 0:

    os.close(r)

    print("Sending the following information: ")

    text = b"Hello, World!"

    os.write(w, text)

    print("Written text:", text.decode())

else:

    os.close(w)

    print("\nThe intended process has received the information.")

Output:

Sending the following information:
Written text: Hello, World!

The intended process has received the information.

An OSError might occur while using the os.pipe() method due to invalid or inaccessible processes and paths.

Example Codes: Understanding the os.pipe() Method in Python

import os

reading, writing = os.pipe()

pipe = os.fdopen(writing, "w")

pipe.write("Hello, world!")

pipe.close()

print("Received: ", os.fdopen(reading).read())

Output:

Received:  Hello, world!

Note that the new file descriptors returned by the method os.pipe() are non-inheritable.