plot a histogram in python matplotlib

from matplotlib import pyplot as plt 
import numpy as np 
  
  
# Creating dataset 
a = np.array([22, 87, 5, 43, 56,  
              73, 55, 54, 11, 
              20, 51, 5, 79, 31, 
              27]) 
  
# Creating histogram 
fig, ax = plt.subplots(figsize =(10, 7)) 
ax.hist(a, bins = [0, 25, 50, 75, 100]) 
  
# Show plot 
plt.show() 

import pyplot from matplotlib as plt
plt.hist(x_axis_list, y_axis_list)