pyside2_mppool - GitPress.io

Example Python program pyside2_mppool.py This program creates a PyQt GUI Python version 3.x or newer. To check the Python version use:

python --version

Modules

import sys
import multiprocessing as mp
from PySide2.QtCore import QThread
from PySide2.QtWidgets import (QApplication, QMainWindow, QPushButton,

Classes

class Task(QThread):
class Gui(QMainWindow):

Methods

def run(self):
def mp_task(x):
def init(self):
def do_task(self):
def main():

Code

Python example

import sys
import multiprocessing as mp

from PySide2.QtCore import QThread
from PySide2.QtWidgets import (QApplication, QMainWindow, QPushButton,
                               QComboBox, QWidget, QVBoxLayout)


class Task(QThread):
    def run(self):
        print('task started')
        with mp.Pool() as pool:
            res = pool.map(mp_task, range(10000))
        print('task finished')


def mp_task(x):
    ret = 0
    for i in range(x + 50000):
        ret += i
    return ret


class Gui(QMainWindow):
    def __init__(self):
        super().__init__()
        base = QWidget()
        layout = QVBoxLayout()
        button = QPushButton('click me')
        button.clicked.connect(self.do_task)
        combobox = QComboBox()
        combobox.addItems(['1', '2', '3', '4', '5'])
        layout.addWidget(button)
        layout.addWidget(combobox)
        base.setLayout(layout)
        self.setCentralWidget(base)

    def do_task(self):
        self.thread = Task()
        self.thread.start()


def main():
    app = QApplication(sys.argv)
    window = Gui()
    window.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

Useful Links

Articles: https://python-commandments.org/
Python shell: https://bsdnerds.org/learn-python/
Tutorial: https://pythonprogramminglanguage.com/