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

def main():
    x=np.linspace(0,10,100)
    print(x.shape)
    y=x**2
    print(y.shape)
    #z=3x+4
    plt.plot(x,y,'r-',linewidth=2)
    plt.xlabel('x')
    plt.ylabel('y=x^2')
    plt.title('Quadratic function')
    plt.grid(True)
    #plt.show()#nononono
    plt.savefig("graf1.png",dpi=300,transparent=True)
    #Me morfi pinaka
    #for i in range(x.shape[0]):
    #    print(x[i])
    #Me morfi listas
    #for el in x:
    #    print(el)

if __name__=="__main__":
    main()