I have a Python program (main.py) that has a constant stream of data that is handled by a class RTStreamer which basically gets the data -- via a live stream -- and appends it to a numpy array. However I would like to actually visualize the data as it is coming in which is where tkinter and matplotlib come in. In another python file (gui.py) I have a live plot using matplotlib animations and a button to trigger my first file (main.py) to start streaming the data. However when I click the button to start streaming the data I can see on my console that it is getting the data and appending it to the array (because I am printing the array), however the chart does not update at all.
Here is a simplified version of what my main.py looks like:
closeBidArray = np.array([])
class RTStreamer(stream.Streamer):
def __init__(self, *args, **kwargs):
super(RTStreamer, self).__init__(*args, **kwargs)
print(datetime.now(), "initialized")
def on_success(self, data):
# get data and append it to closeBidArray
def on_error(self, data):
# disconnect
def run():
stream = RTStreamer()
stream.rates()
An here is what my gui.py looks like:
import main # in order to get closeBidArray
figure = Figure(figsize=(5,5), dpi=100)
subplot1 = figure.add_subplot(111)
class App(tk.Tk):
# Mostly to do with formatting the window and frames in it
def animate():
subplot1.clear
subplot1.plot(main.closeBidArray)
class MainPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
# THIS IS THE BUTTON THAT TRIGGERS TO FUNCTION THAT STREAMS THE DATA:
button1 = tk.Button(text="Hi", command=main.run)
button1.pack()
canvas = FigureCanvasTkAgg(figure, self)
canvas.show()
canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=True)
app = App()
ani = animation.FuncAnimation(figure, animate, interval=1000)
app.mainloop()
I've noticed if I hit CTRL+C to break the program, it strops streaming data and plots the array, and if I hit CTRL+C again it closes the matplotlib window altogether. However I would like to stream and append to the array while also plotting it, any ideas on how I can accomplish this? Thanks.
