Python中的 Matplotlib.axes.Axes.remove_callback()

Matplotlib是Python中的一个库，它是 NumPy 库的数值数学扩展。 Axes 类包含大部分图形元素：Axis、Tick、Line2D、Text、Polygon 等，并设置坐标系。 Axes 的实例通过回调属性支持回调。

matplotlib.axes.Axes.remove_callback() 方法

matplotlib 库的轴模块中的remove_callback() 方法用于根据其观察者 ID 删除回调。

Syntax: Axes.remove_callback(self, oid)

Parameters: This method accepts the following parameters.

oid: This parameter is the observer id

Returns: This method does not returns any value,

编程需要懂一点英语

以下示例说明了 matplotlib 中的 matplotlib.axes.Axes.add_callback()函数：

示例 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)
    w = timer.add_callback(update)
    timer.start()
    timer.remove_callback(w)
   
fig, ax = plt.subplots()
start_animation()
         
ax.set_title('matplotlib.axes.Axes.remove_callback() \
function Example', fontweight ="bold") 
  
plt.show()

输出：

示例 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, ax = plt.subplots() 
ax.set(xlim =[0, width], ylim =[0, height]) 
     
fig.canvas.draw()
ll = 1
     
def update():
    global ll
    x = randint(0, width - 1) 
    y = randint(0, height - 1) 
     
    arti = mpatches.Rectangle( 
        (x, y), 1, 1, 
        facecolor = choice(colors), 
        edgecolor = back_color 
    ) 
  
    ax.add_artist(arti)
       
    ax.draw_artist(arti) 
  
    fig.canvas.blit(ax.bbox) 
    print("Draw at time :", time.time())
  
    if ll > 10:
        timer.remove_callback(w)
    ll += 1
     
timer = fig.canvas.new_timer(interval = 1) 
w = timer.add_callback(update) 
timer.start()
         
ax.set_title('matplotlib.axes.Axes.remove_callback()\
function Example', fontweight ="bold") 
  
plt.show()

输出：

Draw at time : 1588597900.000635
Draw at time : 1588597900.047566
Draw at time : 1588597900.0787704
Draw at time : 1588597900.11001
Draw at time : 1588597900.1412835
Draw at time : 1588597900.1725228
Draw at time : 1588597900.2037697
Draw at time : 1588597900.2350247
Draw at time : 1588597900.2662778
Draw at time : 1588597900.2975273
Draw at time : 1588597900.313137