import matplotlib.pyplot as plt
import queue

data_queue = queue.Queue()

x_data, y_data = [], []

fig, ax = plt.subplots()
line, = ax.plot([], [], 'r-')

def init():
    ax.set_xlim(0, 100)
    ax.set_ylim(0, 10)
    return line,

def update(frame):
    # sprawdzamy, czy są nowe dane w kolejce
    while not data_queue.empty():
        value = data_queue.get()
        x_data.append(len(x_data))
        y_data.append(value)
        if len(x_data) > 100:
            x_data.pop(0)
            y_data.pop(0)
    line.set_data(x_data, y_data)
    return line,