Matplotlib是Python中的一个库，它是数字的-NumPy库的数学扩展。轴类包含大多数图形元素：Axis，Tick，Line2D，Text，Polygon等，并设置坐标系。 Axes实例通过callbacks属性支持回调。
matplotlib.axes.Axes.draw_artist()函数
matplotlib库的axiss模块中的Axes.draw_artist()函数用于有效地更新Axes数据。
用法： Axes.draw_artist(self, a)
参数：此方法接受以下参数。
- a:此参数是要绘制的艺术家。
返回值：此方法不返回任何值。
注意：仅在缓存渲染器的初始绘制之后才能使用此方法。
以下示例说明了matplotlib.axes中的matplotlib.axes.Axes.draw_artist()函数：
范例1：
# 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()
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
)
ax.add_artist(arti)
start = time.time()
ax.draw_artist(arti)
fig.canvas.blit(ax.bbox)
print("Draw at time:", time.time() - start)
timer = fig.canvas.new_timer(interval = 1)
timer.add_callback(update)
timer.start()
ax.set_title('matplotlib.axes.Axes.draw_artist()\
function Example')
plt.show() 输出：
Draw at time:0.37501978874206543 Draw at time:0.015624046325683594 Draw at time:0.03127431869506836 Draw at time:0.015625953674316406 Draw at time:0.015601396560668945 Draw at time:0.015614986419677734 ........ so on...
范例2：
# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
import time
fig, ax = plt.subplots()
line, = ax.plot(np.random.randn(100))
tstart = time.time()
num_plots = 0
fig.canvas.draw()
while time.time()-tstart < 5:
line.set_ydata(np.random.randn(100))
ax.draw_artist(ax.patch)
ax.draw_artist(line)
num_plots += 1
ax.set_title('matplotlib.axes.Axes.draw_artist() \
function Example')
plt.show() 输出：
相关用法
注：本文由纯净天空筛选整理自SHUBHAMSINGH10大神的英文原创作品 Matplotlib.axes.Axes.draw_artist() in Python。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。