#!/usr/bin/python3
import matplotlib
matplotlib.use('Agg') #Non interactive backend
import matplotlib.pyplot as plt
import numpy as np

def main():
    #x=np.random.rand(50)
    #x=np.random.normal(0,1,1000)
    x=['A','B','C']
    y=[25,20,40]
    z=np.array(y)
    q=np.array(x,dtype='object')
    #plt.bar(q,z,color=['red','blue','green'])
    plt.pie(z,labels=q,autopct='%1.1f%%',explode=(0,0.1,0))
    plt.title('Bar Plot')
    plt.xlabel('Value')
    plt.ylabel('Freq')
    plt.savefig('fig4.png',dpi=300,transparent=True)

if __name__=="__main__":
    main()