Pro. for Comp. Book and issue number one...

import numpy as np
import matplotlib.pyplot as plt

t = np.linspace(-2, 2, 100)   # choose 100 points in a time interval

f_values  = t**2
g_values  = np.exp(t)

plt.plot(t, f_values, 'r', t, g_values, 'b--')
plt.xlabel('t')
plt.ylabel('f and g')
plt.legend(['t**2', 'e**t'])
plt.title('Plotting Two Functions (t**2 and e**t)')
plt.grid('on')
plt.axis([-3, 3, -1, 10])
plt.show()

# page 24 and 25 of Programming for Computations