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#############################################################################
##
## Copyright (C) 2021 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of The Qt Company Ltd nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################
"""PySide6 Charts example: Simple memory usage viewer"""
import os
import sys
from PySide6.QtCore import QProcess
from PySide6.QtWidgets import QApplication, QMainWindow
from PySide6.QtCharts import QChart, QChartView, QPieSeries
def runProcess(command, arguments):
process = QProcess()
process.start(command, arguments)
process.waitForFinished()
std_output = process.readAllStandardOutput().data().decode('utf-8')
return std_output.split('\n')
def getMemoryUsage():
result = []
if sys.platform == 'win32':
# Windows: Obtain memory usage in KB from 'tasklist'
for line in runProcess('tasklist', [])[3:]:
if len(line) >= 74:
command = line[0:23].strip()
if command.endswith('.exe'):
command = command[0:len(command) - 4]
memoryUsage = float(line[64:74].strip().replace(',', '').replace('.', ''))
legend = ''
if memoryUsage > 10240:
legend = '{} {}M'.format(command, round(memoryUsage / 1024))
else:
legend = '{} {}K'.format(command, round(memoryUsage))
result.append([legend, memoryUsage])
else:
# Unix: Obtain memory usage percentage from 'ps'
psOptions = ['-e', 'v']
memoryColumn = 8
commandColumn = 9
if sys.platform == 'darwin':
psOptions = ['-e', '-v']
memoryColumn = 11
commandColumn = 12
for line in runProcess('ps', psOptions):
tokens = line.split(None)
if len(tokens) > commandColumn and "PID" not in tokens: # Percentage and command
command = tokens[commandColumn]
if not command.startswith('['):
command = os.path.basename(command)
memoryUsage = round(float(tokens[memoryColumn].replace(',', '.')))
legend = '{} {}%'.format(command, memoryUsage)
result.append([legend, memoryUsage])
result.sort(key = lambda x: x[1], reverse=True)
return result
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.setWindowTitle('Memory Usage')
memoryUsage = getMemoryUsage()
if len(memoryUsage) > 5:
memoryUsage = memoryUsage[0:4]
self.series = QPieSeries()
for item in memoryUsage:
self.series.append(item[0], item[1])
slice = self.series.slices()[0]
slice.setExploded()
slice.setLabelVisible()
self.chart = QChart()
self.chart.addSeries(self.series)
self.chartView = QChartView(self.chart)
self.setCentralWidget(self.chartView)
if __name__ == '__main__':
app = QApplication(sys.argv)
mainWin = MainWindow()
availableGeometry = mainWin.screen().availableGeometry()
size = availableGeometry.height() * 3 / 4
mainWin.resize(size, size)
mainWin.show()
sys.exit(app.exec_())
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