Matplotlib是Python中的一個庫,它是數字的-NumPy庫的數學擴展。 Artist類包含用於呈現到FigureCanvas中的對象的Abstract基類。圖中所有可見元素都是Artist的子類。
matplotlib.artist.Artist.add_callback()方法
matplotlib庫的artist模塊中的add_callback()方法用於添加一個回調函數,隻要Artist屬性之一發生更改,該函數就會被調用。
用法:Artist.add_callback(self, func)
參數:此方法接受以下參數。
- func:此參數是回調函數。
返回值:此方法返回與回調關聯的觀察者ID。
以下示例說明了matplotlib中的matplotlib.artist.Artist.add_callback()函數:
範例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()
輸出:
範例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()
輸出:
注:本文由純淨天空篩選整理自SHUBHAMSINGH10大神的英文原創作品 Matplotlib.artist.Artist.add_callback() in Python。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。