Python 中的 matplotlib . artist . artist . add _ callback()
原文:https://www . geesforgeks . org/matplotlib-artist-artist-add _ callback-in-python/
Matplotlib 是 Python 中的一个库，是 NumPy 库的数值-数学扩展。艺术家类包含抽象基类，用于渲染到图形画布中的对象。图形中所有可见的元素都是艺术家的子类。
matplotlib . artist . artist . add _ callback()方法
matplotlib 库的 artist 模块中的 add_callback()方法用于添加一个回调函数，每当 Artist 的某个属性发生变化时就会调用该函数。
语法: Artist.add_callback(self，func)
参数:该方法接受以下参数。
- 功能:该参数为回调函数。
返回:这个方法返回与回调相关联的观察者 id。
下面的例子说明了 matplotlib 中的 matplotlib . artist . artist . add _ callback()函数:
例 1:
# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
import time
def update():
plt.get_current_fig_manager().canvas.figure.patch.set_facecolor(str(np.random.random()))
plt.draw()
print("Draw at time :", time.time())
def start_animation():
timer = fig.canvas.new_timer(interval = 50)
timer.add_callback(update)
timer.start()
fig = plt.figure()
start_animation()
fig.suptitle('matplotlib.artist.Artist.add_callback() \
function Example', fontweight ="bold")
plt.show()
输出:
例 2:
# Implementation of matplotlib function
from random import randint, choice
import time
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
back_color = "black"
colors = ['red', 'green', 'blue', 'purple']
width, height = 4, 4
fig = plt.figure()
plt.xlim([0, width])
plt.ylim([0, height])
fig.canvas.draw()
def update():
x = randint(0, width - 1)
y = randint(0, height - 1)
arti = mpatches.Rectangle(
(x, y), 1, 1,
facecolor = choice(colors),
edgecolor = back_color
)
fig.add_artist(arti)
fig.draw_artist(arti)
fig.canvas.blit(fig.bbox)
print("Draw at time :", time.time())
timer = fig.canvas.new_timer(interval = 1)
timer.add_callback(update)
timer.start()
fig.suptitle('matplotlib.artist.Artist.add_callback() \
function Example', fontweight ="bold")
plt.show()
输出:
[https://media.geeksforgeeks.org/wp-content/uploads/20200504221206/python-matplotlib-call-back.webm](https://media.geeksforgeeks.org/wp-content/uploads/20200504221206/python-matplotlib-call-back.webm)版权属于：月萌API www.moonapi.com，转载请注明出处
