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# Axis Equal Demo

    import matplotlib.pyplot as plt
    import numpy as np

    # Plot circle of radius 3.

    an = np.linspace(0, 2*np.pi, 100)
    fig, axs = plt.subplots(2, 2)

    axs[0, 0].plot(3*np.cos(an), 3*np.sin(an))
    axs[0, 0].set_title('not equal, looks like ellipse', fontsize=10)

    axs[0, 1].plot(3*np.cos(an), 3*np.sin(an))
    axs[0, 1].axis('equal')
    axs[0, 1].set_title('equal, looks like circle', fontsize=10)

    axs[1, 0].plot(3*np.cos(an), 3*np.sin(an))
    axs[1, 0].axis('equal')
    axs[1, 0].axis([-3, 3, -3, 3])
    axs[1, 0].set_title('still a circle, even after changing limits', fontsize=10)

    axs[1, 1].plot(3*np.cos(an), 3*np.sin(an))
    axs[1, 1].set_aspect('equal', 'box')
    axs[1, 1].set_title('still a circle, auto-adjusted data limits', fontsize=10)

    fig.tight_layout()

    plt.show()

Total running time of the script: ( 0 minutes 0.134 seconds)

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