Data output - image annotation and annotation

Mark which line is what in the upper right corner , It's called adding a legend ：  plt.legend()

Give the picture a name ： plt.titlt(' Picture name ')

import numpy as np
import matplotlib.pyplot as plt
 
x = np.linspace(0, 2, 100)
 
# Example 1
plt.figure()
plt.plot(x, x+2, label='linear')  
plt.plot(x, x**2, label='quadratic')  
plt.plot(x, x**3, label='cubic')
plt.xlabel('x label')
plt.ylabel('y label')
plt.title("Legend Example 1")
plt.legend()
plt.show()

Further more , See the following links for other annotation methods

utilize python Draw a line _python_ Script house (jb51.net)​​​​​​​

Mark a point separately ：

python Notes for each line on the picture _# Bread and butter blog -CSDN Blog