sending out messages simultaneously python script

Question

I created 10 user accounts for an application that we have and i would like to have all these 10 users send out messages simultaneously.

so i made 10 .py scripts, in each script there is just a system call that passes `

"name of app cli client, some parameters including email and message"

to bash, then I run all of them from bash in one command using & and my question is how can I do this but do it better?

how can I send out 10 messages in parallel from bash? without creating 10 individual .py scripts? any help would be nice^^

how can I do this but do it better : what are your criteria of acceptation ? What don't you like about the default behaviour of & ? If your scripts are a simple echo, the result should be pretty much instant. — Aserre
– Aserre, Commented Sep 4, 2018 at 12:18
Create a list of dictionary of the parameters and loop on it. This way, 1 python script builds the 10 system calls and executes them. — Nic3500
– Nic3500, Commented Sep 4, 2018 at 12:22
I'd like to have these 10 users all send out a message simultaneously without having to create 10 individual scripts for each one user.. and my scripts are just a subprocess.check_output() with just that command in my question — skdadle
– skdadle, Commented Sep 4, 2018 at 12:22
Well, using a loop is not "simultaneous" theoretically, but it will be very close. Looping on 10 items is not an atomic action, but it is very small. — Nic3500
– Nic3500, Commented Sep 4, 2018 at 12:27

Asif Mohammed · Accepted Answer · 2018-09-04 12:24:59Z

1

import threading,os

ten_python_scripts = [] # mention all files here

def func(filename):
  x = subprocess.call("python {}".format(filename), shell=True)

threads = []
for filename in ten_python_scripts:
  x = threading.Thread(target=func, args=(filename,))
  threads.append(x)
for thread in threads:
  thread.start()
for thread in threads:
  thread.join()

answered Sep 4, 2018 at 12:24

Asif Mohammed

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8 Comments

skdadle Over a year ago

thanks a lot for the answer!!! but would it also work if i just use 10 strings (my commands as strings) instead of all the file names? in ten_python_scripts ,

skdadle Over a year ago

when I write my commands as strings it attempts to read them as file names even though they are enclosed in single quotes, what could i change so that it knows they are strings and not file names? I'm really a noob programmer and never worked with threading

Asif Mohammed Over a year ago

can you share some code, i am not able to understand. for threading follow this tutorial simplifiedpython.net/python-threading-example

skdadle Over a year ago

i used your code but i kept strings in my list like this ten_python_scripts = ["bash command 1", "bash command 2"] ... ( my bash commands starts with "cd ~/app-cli && some parameteres") and when i run my script i get:

python: can't open file 'cd': [Errno 2] No such file or directory python: can't open file 'cd': [Errno 2] No such file or directory

skdadle Over a year ago

i figured out what i was doing wrong, i should change python {} to just {} if i want to run strings :D thank you so much!!

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