Matplotlib.pyplot.show() in Python

# sample code
import matplotlib.pyplot as plt 
  
plt.plot([1, 2, 3, 4], [16, 4, 1, 8]) 
plt.show() 

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
fig = plt.figure()
x = np.arange(20) / 50
y = (x + 0.1)*2
val1 = [True, False] * 10
val2 = [False, True] * 10
plt.errorbar(x, y, 
             xerr = 0.1, 
             xlolims = True, 
             label ='Line 1')
y = (x + 0.3)*3
plt.errorbar(x + 0.6, y, 
             xerr = 0.1,
             xuplims = val1,
             xlolims = val2,
             label ='Line 2')
y = (x + 0.6)*4
plt.errorbar(x + 1.2, y,
             xerr = 0.1, 
             xuplims = True,
             label ='Line 3')
plt.legend()
fig.suptitle('matplotlib.pyplot.show() Example')
plt.show()

# Implementation of matplotlib function
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0, 10, 500)
y = np.sin(x**2)+np.cos(x)
fig, ax = plt.subplots()
ax.plot(x, y, label ='Line 1')
ax.plot(x, y - 0.6, label ='Line 2')
ax.legend()
fig.suptitle('matplotlib.pyplot.show() Example')
plt.show()