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Questions tagged [multiprocess]

Concerning running parallel code in separate processes (unlike multithreading) and/or related to package `multiprocess` from PyPI.

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Why won't my python else statement trigger?

Here is the code, these are dummy classes that will eventually be replaced by something more useful. What I want the while loop to do is pull data from the queue to see if a poison pill was dropped. If not I want whatever is in the else statement to…
Kyle Sponable
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Python NameError in script

I am having issues with this multiprocess script I modeled it after the one I found here http://broadcast.oreilly.com/2009/04/pymotw-multiprocessing-part-2.html class test_imports:#Test classes remove def import_1(self, control_queue,…
Kyle Sponable
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Why wont my python thread react to global variables

This code is to start and stop multiple copies of various different thread types. I will preface this with saying I tried using pipes to control the threads but keep getting random memory errors to do with the pipes. This is a prototype of a factory…
Kyle Sponable
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Python MultiProcess, Logging, Various Classes

I am currently trying to log to a single file from multiple processes but I am having a lot of trouble with it. I have spend countless hours looking online -- stackoverflow and Google, but have come up with nothing concrete. I have read: How should…
user2570374
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Fire event in another process

In my application I'd like to start another process, which has 3 events. How can I fire/trigger an event, or just call a function, which is in another process? I also would like to pass some object to the another process (i.e. the handler of my…
MartoniczD
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While loop is breaking passing of values to a variable within a python process

I have been trying to learn how multiprocessing works in python, and have created a very simple script to test my understanding. Everything seems to work fine, except for the fact that, within a process, none of value assignments that happen after a…
achillesminor
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multiprocessing exec's in Powershell up to a threshold

I have multiple commands in a string array that invoke SSIS packages. To take advantage of the hardware I want to run many packages at once, waiting until one completes before adding another to the fray. From looking at other similar questions on…
user812323
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how to prevent the process launching if it was launched before?

I have application that has a several process, including the authentication process. I need to prevent launching of authentication, if connection was established and authentication successfull. How can I implement this behavior? Platform - linux.
eulers_child
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Python redirect stdin/stdout with execv

I'm using python to os.fork a child progress, and use os.execv to execute another program in the child progress. How can I redirect I/O in the child program. I tried this but failed. import sys, os pid = os.fork() if pid is 0: sys.stdin =…
Bin Wang
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Python threading - listen to network while compiling

In python (2.6.6) what is the best way I can have a thread/process checking a network (message queue) for things while concurrently doing work (compiling). If i receive a command down the message queue, i must be able to kill and spawn compile…
James Bennet
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semget not such file or directory

I'm trying to get this code working but I can't. I manage to create some code that doesn't show any compilation error or warning, but when I try to execute it fails with this error: semget: No such file or directory This is my code: #include…
user1660559
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signal error: "invalid use of void expression"

I have some other trouble using the "signal" function. I have 5 children processes and its father. Only one process should be running at a time, and that process should change to another aleatory process with some delay (from 1 to 10 seconds). For…
user1660559
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Node.js: Invoke different behavior via cluster.fork()

I'm working with Node and Redis, and I have a need to add a subscriber to redis in case an event happens. The problem is I only want the processing to happen once... And I'd really like for only need one of my forked processes to be listening to…
ControlAltDel
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C++: How to control process number

I am trying a multiprocess code with C++. I have two questions about the code below: Q1. It seems 'Vtmp' or 'Ntmp' did not store the info properly for each process. I don't know why. Q2. If Q1 fixed, My final purpose is to let each Vtmp(V[i]) run…
xin wang
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Understanding continuation tokens in AWS S3

I'd like to understand better how continuation tokens work in list_objects_v2(). Here is a piece of code that iterates through a large S3 bucket, storing the continuation tokens provided: def transformer(): # some s3 client response =…
OctaveParango
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