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edited Oct 23, 2018 at 3:50

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In Python 3, here's a solution using two separate files, onewhich takes a producer (for testing)command off the command line and one adelivers real-time receiver. The output is decoded nicely decoded strings as a normal looking stringthey are received.

ProducerReceiver (dummy_outputreceiver.py):

import timesubprocess import sys forcmd i= insys.argv[1:] p range= subprocess.Popen(5cmd, stdout=subprocess.PIPE) for line in p.stdout: print("hello"received: {}".format(i)) sys.stdoutline.flushrstrip() time.sleepdecode(1"utf-8")))

ReceiverExample simple program that could generate real-time output (receiverdummy_out.py):

import subprocess time cmd = 'pythonimport dummy_output.py'.split()sys p = subprocess.Popen(cmd, stdout=subprocess.PIPE) for linei in p.stdoutrange(5): print("received:"hello {}".format(linei)) sys.rstripstdout.flush() time.decodesleep("utf-8"))1)

Output:

$python receiver.py python dummy_out.py received: hello 0 received: hello 1 received: hello 2 received: hello 3 received: hello 4

In Python 3, here's a solution using two separate files, one a producer (for testing) and one a real-time receiver. The output is decoded nicely as a normal looking string.

Producer (dummy_output.py):

import time import sys for i in range(5): print("hello {}".format(i)) sys.stdout.flush() time.sleep(1)

Receiver (receiver.py):

import subprocess  cmd = 'python dummy_output.py'.split() p = subprocess.Popen(cmd, stdout=subprocess.PIPE) for line in p.stdout: print("received: {}".format(line.rstrip().decode("utf-8")))

Output:

$python receiver.py received: hello 0 received: hello 1 received: hello 2 received: hello 3 received: hello 4

In Python 3, here's a solution, which takes a command off the command line and delivers real-time nicely decoded strings as they are received.

Receiver (receiver.py):

import subprocess import sys cmd = sys.argv[1:] p = subprocess.Popen(cmd, stdout=subprocess.PIPE) for line in p.stdout: print("received: {}".format(line.rstrip().decode("utf-8")))

Example simple program that could generate real-time output (dummy_out.py):

import time import sys for i in range(5): print("hello {}".format(i)) sys.stdout.flush() time.sleep(1)

Output:

$python receiver.py python dummy_out.py received: hello 0 received: hello 1 received: hello 2 received: hello 3 received: hello 4

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answered Oct 23, 2018 at 3:43

watsonic

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In Python 3, here's a solution using two separate files, one a producer (for testing) and one a real-time receiver. The output is decoded nicely as a normal looking string.

Producer (dummy_output.py):

import time import sys for i in range(5): print("hello {}".format(i)) sys.stdout.flush() time.sleep(1)

Receiver (receiver.py):

import subprocess cmd = 'python dummy_output.py'.split() p = subprocess.Popen(cmd, stdout=subprocess.PIPE) for line in p.stdout: print("received: {}".format(line.rstrip().decode("utf-8")))

Output:

$python receiver.py received: hello 0 received: hello 1 received: hello 2 received: hello 3 received: hello 4

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