Python 中的 matplotlib . axes . axes . remove _ callback()
原文:https://www . geeksforgeeks . org/matplotlib-axes-axes-remove _ callback-in-python/
Matplotlib 是 Python 中的一个库，是 NumPy 库的数值-数学扩展。轴类包含了大部分的图形元素:轴、刻度、线二维、文本、多边形等。，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 axes 模块中的 remove_callback()方法用于根据观察器 id 移除回调。
语法: Axes.remove_callback(self，oid)
参数:该方法接受以下参数。
- oid: 这个参数是观察者 id
返回:该方法不返回值，
下面的例子说明了 matplotlib 中的 matplotlib . axes . axes . 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)
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:
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
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