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@bechu
Last active December 17, 2015 01:59
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python matplotlib graph
import sys, os, random
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import matplotlib
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar
from matplotlib.figure import Figure
import subprocess
import re
class AppForm(QMainWindow):
def __init__(self, parent=None):
QMainWindow.__init__(self, parent)
self.data = []
self.setWindowTitle('Ping google result')
self.create_main_frame()
self.on_draw()
self.timer = QTimer()
self.timer.timeout.connect(self.ping)
self.timer.start(1000)
def on_draw(self):
self.axes.clear()
self.axes.grid(True)
self.axes.plot(self.data)
self.canvas.draw()
def create_main_frame(self):
self.main_frame = QWidget()
self.dpi = 100
self.fig = Figure((5.0, 4.0), dpi=self.dpi)
self.canvas = FigureCanvas(self.fig)
self.canvas.setParent(self.main_frame)
self.axes = self.fig.add_subplot(111)
self.mpl_toolbar = NavigationToolbar(self.canvas, self.main_frame)
vbox = QVBoxLayout()
vbox.addWidget(self.canvas)
vbox.addWidget(self.mpl_toolbar)
self.main_frame.setLayout(vbox)
self.setCentralWidget(self.main_frame)
def ping(self):
host = "www.google.com"
ping = subprocess.Popen(
["ping", "-c", "1", host],
stdout = subprocess.PIPE,
stderr = subprocess.PIPE
)
out, error = ping.communicate()
m = re.search('time=(.*)ms', out)
self.data.append(float(m.group(1)))
self.on_draw()
def main():
app = QApplication(sys.argv)
form = AppForm()
form.show()
app.exec_()
if __name__ == "__main__":
main()
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