I have a python script that is working great. It takes in live data from a
Qt C++ app, and displays it in the graph.
The problem is, I have to manually start the script. I cannot get the Qt
app to start the script, I can't get other python scripts to start it. I
have no means by which to automate it's opening for the end user. It will
only run if I manually click on it or type in the command prompt for it.
What is causing this?
import pyqtgraph as pg
> from pyqtgraph.Qt import QtCore, QtGui
> import numpy as np
> import math
> import socket
>
> vis_socket = socket.socket()
> host = socket.gethostname()
> port = 5040
>
> vis_socket.connect((host, port))
>
> frame = 0
> position = []
>
> TIME_SIZE = 300
>
> torque_mag = []
> force_mag = []
>
> main_window = pg.GraphicsWindow()
> main_window.setWindowTitle('Bracelet Motion')
>
> mag_labels = {"left":("Newtons"),"bottom":("Frames")}
> magnitude_plot = main_window.addPlot()
> magnitude_plot.setYRange(-5,50)
> magnitude_plot.setLabel('left', 'Newtons')
> magnitude_plot.setLabel('bottom', 'Number of Displayed Frames')
> magnitude_plot.addLegend()
> magnitude_plot.setTitle('Loadcell Magnitudes')
> # plot2 = mainWindow.addPlot()
>
> curve_f_mag = magnitude_plot.plot(force_mag, pen='g', name=' Force')
> curve_tq_mag = magnitude_plot.plot(torque_mag, pen='r', name=' Torque')
>
>
> def inc_frame():
> global frame, position
> if len(position) < TIME_SIZE:
> position.append(frame)
> # else:
> # position[:-1] = position[1:]
> # position[-1] = frame
> frame += 1
>
> def plot_force_mag(data):
> # incFrame()
> global force_mag, curve_f_mag, position
> magnitude = calc_magnitude(data)
> if len(force_mag) < TIME_SIZE:
> force_mag.append(magnitude) # build the list to desired size
> else:
> force_mag[:-1] = force_mag[1:] # shift data in the array one
> sample left
> force_mag[-1] = magnitude # set the last duplicate value to the
> new value
> curve_f_mag.setData(position, force_mag)
>
> def plot_torque_mag(data):
> # incFrame()
> global torque_mag, curve_tq_mag, position
> magnitude = calc_magnitude(data)
> if len(torque_mag) < TIME_SIZE:
> torque_mag.append(magnitude) # build the list to desired size
> else:
> torque_mag[:-1] = torque_mag[1:] # shift data in the array one
> sample left
> torque_mag[-1] = magnitude # set the last duplicate value to the
> new value
> curve_tq_mag.setData(position, torque_mag)
> # curveTqMag.setPos(frames, 0)
>
> def calc_magnitude(data):
> val_x = float(data[0])
> val_y = float(data[1])
> val_z = float(data[2])
> return round(math.sqrt((val_x*val_x) + (val_y*val_y) +
> (val_z*val_z)),3)
>
> def parse_data(data):
> data_list = data.split()
> if len(data_list) > 0:
> inc_frame()
> for d in data_list:
> i = data_list.index(d)
> # if d == "tipPos":
> # getTipPos(dataList[i:i + 4])
> if d == "force":
> plot_force_mag(data_list[i+1 : i+4])
> if d == "torque":
> plot_torque_mag(data_list[i+1 : i+4])
>
> def main():
> incoming = vis_socket.recv(8192).decode()
> stream_list = incoming.split(':')
> for chunk in stream_list:
> parse_data(chunk)
>
> timer = pg.QtCore.QTimer()
> timer.timeout.connect(main)
> timer.start(50)
>
> if __name__ == '__main__':
> import sys
>
> if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
> QtGui.QApplication.instance().exec_()
>
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