Python中的 Matplotlib.artist.Artist.get_window_extent()

Matplotlib是Python中的一个库，它是 NumPy 库的数值数学扩展。 Artist 类包含呈现为 FigureCanvas 的对象的 Abstract 基类。图中所有可见元素都是 Artist 的子类。

Matplotlib.artist.Artist.get_window_extent() 方法

matplotlib 库的艺术家模块中的get_window_extent() 方法用于返回显示空间中的轴边界框。

Syntax: Artist.get_window_extent(self)

Parameters: This method accepts the following parameters.

• renderer: This parameter is the RendererBase subclass.

Returns: This method return the figure bounding box in display space.

下面的示例说明了 matplotlib 中的 matplotlib.artist.Artist.get_window_extent()函数：

示例 1：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.artist import Artist 
  
  
X = np.arange(-10, 10, 1.5)
Y = np.arange(-10, 10, 1.5)
U, V = np.meshgrid(X, Y)
  
fig, ax = plt.subplots()
  
ax.quiver(X, Y, U, V)
  
fig.canvas.draw()  
renderer = fig.canvas.renderer
  
# use of get_window_extent() method
val = Artist.get_window_extent(ax, renderer)
print("Value Return by get_window_extent():")
print(val)
  
fig.suptitle('matplotlib.artist.Artist.get_window_extent() \
function Example', fontweight="bold")
  
plt.show()

输出：

Value Return by get_window_extent():
Bbox(x0=0.0, y0=0.0, x1=0.0, y1=0.0)

示例 2：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.artist import Artist 
  
  
xx = np.random.rand(10, 10)
  
fig, ax = plt.subplots()
  
m = ax.pcolor(xx)
m.set_zorder(-20)
  
fig.canvas.draw()  
renderer = fig.canvas.renderer
  
# use of get_window_extent() method
val = Artist.get_window_extent(ax, renderer)
print("Value Return by get_window_extent():")
print(val)
  
fig.suptitle('matplotlib.artist.Artist.get_window_extent() \
function Example', fontweight="bold")
  
plt.show()

输出：

Value Return by get_window_extent():
Bbox(x0=0.0, y0=0.0, x1=0.0, y1=0.0)