Using matplotlib in Spyder v/s REPL

[snippsat]

If this running outside a environment like Sypder/REPL/Notebook.
The need to use plt.show() to show the plot.

import matplotlib.pyplot as plt

def plotgrh():
    fig, ax = plt.subplots(1,2)
    print("I am plotting graph")
    plt.plot([6,1,8,4],[4,7,2,1])
    # Uncomment for save plot
    #plt.savefig('Graph.png')
    plt.show()
    print("Graph plotted")

plotgrh()