Matplotlib.artist.Artist.get_alpha() in Python

# Implementation of matplotlib function
from matplotlib.artist import Artist  
import matplotlib 
import numpy as np 
import matplotlib.pyplot as plt 
  

np.random.seed(10**7) 
mu = 121 
sigma = 21
x = mu + sigma * np.random.randn(1000) 
   
num_bins = 100
fig, ax = plt.subplots() 
   
n, bins, patches = ax.hist(x, num_bins, 
                           density = 1, 
                           color ='green', 
                           alpha = 0.7) 
   
y = ((1 / (np.sqrt(2 * np.pi) * sigma)) *
     np.exp(-0.5 * (1 / sigma * (bins - mu))**2)) 
  
ax.plot(bins, y, '--', color ='black') 
  
ax.set_xlabel('X-Axis') 
ax.set_ylabel('Y-Axis') 
  
w = Artist.get_alpha(ax) 
ax.set_title("Alpha Value : "+str(w)) 

fig.suptitle('matplotlib.artist.Artist.get_alpha()\
function Example', fontweight ="bold") 

plt.show()

# Implementation of matplotlib function
from matplotlib.artist import Artist  
import matplotlib.pyplot as plt 
import numpy as np 

  
rx, ry = 3., 1.

value1 = rx * ry * np.pi 
value2 = np.arange(0, 3 * np.pi + 0.01, 0.2) 
value3 = np.column_stack([rx / value1 * np.cos(value2), 
                          ry / value1 * np.sin(value2)]) 
   
x, y, s, c = np.random.rand(4, 99) 
s *= 10**2.
   
fig, ax = plt.subplots() 
ax.scatter(x, y, s, c, marker = value3) 
  
Artist.set_alpha(ax, 0.5) 
  
w = Artist.get_alpha(ax) 
ax.set_title("Alpha Value : "+str(w)) 

fig.suptitle('matplotlib.artist.Artist.get_alpha()\
function Example', fontweight ="bold") 

plt.show()