import matplotlib.pyplot as plt
import numpy as np
x=np.arange(0,10,0.1)
print "x=",x
y=np.random.randn(len(x))
print "y=",y
fig=plt.figure() # instance of the fig obj
ax = fig.add_subplot(111) # instance of the axes obj
l, m = ax.plot(x, y, x, y**2) # returns a tuple of obj
l.set_color('blue')
m.set_color('red')
t = ax.set_title('random numbers')
plt.show()