PyQt5 example

testqt.py

import sys
import matplotlib
import socket
matplotlib.use('Qt5Agg')

from PyQt5 import QtCore, QtWidgets

from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure

class Worker(QtCore.QThread):
    output = QtCore.pyqtSignal(int)
    
    def __init__(self, parent = None):
        QtCore.QThread.__init__(self, parent)

        self.idx = 55 # byte to look at
        self.idx = 1 # I'm using this for easy debugging
        
        # Create a TCP/IP socket
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        # Connect the socket to the port where the server is listening
        server_address = ('localhost', 8100)
        print ('connecting to %s port %s' % server_address)
        self.sock.connect(server_address)

    def __del__(self):
        self.exiting = True
        self.wait()

    def run(self):
        while True:
            data = self.sock.recv(1024)
            if data:
                split = [data[i] for i in range(0, len(data))]
                self.send_update(split[self.idx])
            else:
                break

    def send_update(self, num):
        self.output.emit(num)

class MplCanvas(FigureCanvas):

    def __init__(self, parent=None, width=5, height=4, dpi=100):
        fig = Figure(figsize=(width, height), dpi=dpi)
        self.axes = fig.add_subplot(111)
        super(MplCanvas, self).__init__(fig)


class MainWindow(QtWidgets.QMainWindow):

    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)

        self.canvas = MplCanvas(self, width=5, height=4, dpi=100)
        self.setCentralWidget(self.canvas)

        self.ydata = list()

        self.show()

        self.worker = Worker()
        self.worker.output.connect(self.update_plot)
        self.worker.start()
        
    def update_plot(self, num):
        print('Received', num)
        # Drop off the first y element, append a new one.
        self.ydata.append(num)
        self.canvas.axes.cla()  # Clear the canvas.
        self.canvas.axes.bar(range(len(self.ydata)), self.ydata, color=(0.2, 0.4, 0.6, 0.6))
        # Trigger the canvas to update and redraw.
        self.canvas.draw()


app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
app.exec_()