How to do it...

The following code block creates a stream plot:

1. Prepare the data for the stream plot:

x, y = np.linspace(-3,3,100), np.linspace(-2,4,50)

2. Create the mesh grid:

X, Y = np.meshgrid(x, y)

3. Compute velocities, U and V, as a function of X and Y respectively:

U = 1 - X**2 
V = 1 + Y**2 

4. Plot the stream plot:

plt.streamplot(X, Y, U, V)

5. Set the title for the plot:

plt.title('Basic Streamplot')

6. Display the graph on the screen:

plt.show()