Python中的 Matplotlib.axes.Axes.get_tightbbox()

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.get_tightbbox()函数

matplotlib 库的 axes 模块中的Axes.get_tightbbox()函数用于返回轴的紧密边界框，包括轴及其装饰器。

Syntax: Axes.get_tightbbox(self, renderer, call_axes_locator=True, bbox_extra_artists=None)

Parameters: This method accepts the following parameters.

renderer : This parameter is the RendererBase instance
renderer that will be used to draw the figures.
bbox_extra_artists : This parameter is the list of artists to include in the tight bounding box.
call_axes_locator : This parameter is the list of artists to include in the tight bounding box.

Returns: This method return the bounding box in figure pixel coordinates.

编程需要懂一点英语

下面的示例说明了 matplotlib.axes 中的 matplotlib.axes.Axes.get_tightbbox()函数：

示例 1：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
  
  
X = np.arange(-10, 10, 0.5)
Y = np.arange(-10, 10, 0.5)
U, V = np.meshgrid(X, Y)
    
fig, ax = plt.subplots()
ax.quiver(X, Y, U, V)
ax.invert_xaxis()
w = ax.get_tightbbox(fig.canvas.get_renderer(),
                     call_axes_locator = True, 
                     bbox_extra_artists = None)
  
ax.set_title("Value Return :\n"+str(w), 
              fontsize = 10)
   
fig.suptitle('matplotlib.axes.Axes.get_tightbbox()\
 function Example', fontweight ="bold") 
  
plt.show()

输出：

示例 2：

# Implementation of matplotlib function 
import numpy as np 
import matplotlib.pyplot as plt 
     
xx = np.random.rand(16, 30) 
     
fig, ax = plt.subplots() 
     
m = ax.pcolor(xx) 
m.set_zorder(-20) 
w = ax.get_tightbbox(fig.canvas.get_renderer(), 
                     call_axes_locator = True,
                     bbox_extra_artists = None)
  
ax.set_title("Value Return :\n"+str(w),
              fontsize = 10)
   
fig.suptitle('matplotlib.axes.Axes.get_tightbbox()\
 function Example', fontweight ="bold") 
  
plt.show()

输出：