matplotlib_layout_model.py

import matplotlib.pyplot as plt

def main():
    resized = (8, 3)

    basic_example()
    basic_example(resized)

    fixed_aspect()
    fixed_aspect(resized)

    fixed_aspect_datalim()
    fixed_aspect_datalim(resized)

    plt.show()

def basic_example(figsize=None):
    fig, ax = plt.subplots(figsize=figsize)
    circ = plt.Circle((5, 10), 3, facecolor='lightblue')
    ax.add_patch(circ)
    ax.margins(0.05)
    show_bounds(ax)
    return ax

def fixed_aspect(figsize=None):
    ax = basic_example(figsize)
    ax.set(xlim=[0, 10], ylim=[0, 20], aspect=1)
    return ax

def fixed_aspect_datalim(figsize=None):
    fixed_aspect(figsize).set(adjustable='datalim')

def show_bounds(ax):
    axes_box = ax.get_position().bounds
    # Maximum Axes size
    fig_box(ax, axes_box, lw=5, ec='mediumseagreen', zorder=10)
    # Figure outline
    fig_box(ax, (0.01, 0.02, 0.98, 0.96), lw=4, ec='salmon')

def fig_box(ax, bounds, **kwargs):
    left, bottom, width, height = bounds
    rect = plt.Rectangle((left, bottom), width, height, **kwargs)
    rect.set(clip_on=False, facecolor='none', transform=ax.figure.transFigure)
    ax.add_artist(rect)
    return rect

main()