Several ways for matplotlib heatmap animation

matplotlib_animation.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
main.py
"""
__author__      = "take-iwiw"
__copyright__   = "Copyright 2017, take-iwiw"
__date__        = "18 Oct 2017"

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.cm as cm
import pandas as pd
import time
import matplotlib.animation as animation

NUMBER_X: int = 10
NUMBER_Y: int = 10

CANVAS_WIDTH:  int = 10
CANVAS_HEIGHT: int = 10

def heatmap_animation1():
    fig, ax_lst = plt.subplots(NUMBER_X, NUMBER_Y)
    ax_lst = ax_lst.ravel()

    def plot(data):
        data = np.random.rand(CANVAS_WIDTH, CANVAS_HEIGHT)
        heatmap = ax_lst[0].pcolor(data)

    ani = animation.FuncAnimation(fig, plot, interval=1)
    plt.show()

def heatmap_animation2():
    fig, ax_lst = plt.subplots(NUMBER_X, NUMBER_Y)
    ax_lst = ax_lst.ravel()

    data = np.random.rand(CANVAS_WIDTH, CANVAS_HEIGHT)
    im = ax_lst[0].imshow(data)

    while True:
        t_start = time.time()
        data = np.random.rand(CANVAS_WIDTH, CANVAS_HEIGHT)
        im.set_data(data) 
        plt.pause(0.001)
        t_end = time.time()
        print("fps = {0}".format(999 if t_end == t_start else 1/(t_end-t_start)))

def heatmap_animation3():
    fig, ax_lst = plt.subplots(NUMBER_X, NUMBER_Y)
    ax_lst = ax_lst.ravel()

    data = np.random.rand(CANVAS_WIDTH, CANVAS_HEIGHT)
    heatmap = ax_lst[0].pcolor(data)
    fig.canvas.draw()
    fig.show()

    while True:
        data = np.random.rand(CANVAS_WIDTH, CANVAS_HEIGHT)
        t_start = time.time()
        heatmap = ax_lst[0].pcolor(data)
        ax_lst[0].draw_artist(ax_lst[0].patch)
        ax_lst[0].draw_artist(heatmap)
        fig.canvas.blit(ax_lst[0].bbox)
        fig.canvas.flush_events()
        t_end = time.time()
        print("fps = {0}".format(999 if t_end == t_start else 1/(t_end-t_start)))


def main():
    """
    Entry function
    :called when: the program starts
    :param none: no parameter
    :return: none
    :rtype: none
    """
    heatmap_animation3()



if __name__ == '__main__':
    main()