make_room_for_ylabel_using_axesgrid.py

from mpl_toolkits.axes_grid1 import make_axes_locatable
from mpl_toolkits.axes_grid1.axes_divider import make_axes_area_auto_adjustable



if __name__ == "__main__":
    
    import matplotlib.pyplot as plt
    def ex1():
        plt.figure(1)
        ax = plt.axes([0,0,1,1])
        # ax = plt.subplot(111)

        ax.set_yticks([0.5])
        ax.set_yticklabels(["very long label"])

        make_axes_area_auto_adjustable(ax)
    

    def ex2():

        plt.figure(2)
        ax1 = plt.axes([0,0,1,0.5])
        ax2 = plt.axes([0,0.5,1,0.5])

        ax1.set_yticks([0.5])
        ax1.set_yticklabels(["very long label"])
        ax1.set_ylabel("Y label")
        
        ax2.set_title("Title")

        make_axes_area_auto_adjustable(ax1, pad=0.1, use_axes=[ax1, ax2]) 
        make_axes_area_auto_adjustable(ax2, pad=0.1, use_axes=[ax1, ax2])

    def ex3():

        fig = plt.figure(3)
        ax1 = plt.axes([0,0,1,1])
        divider = make_axes_locatable(ax1)
        
        ax2 = divider.new_horizontal("100%", pad=0.3, sharey=ax1)
        ax2.tick_params(labelleft="off")
        fig.add_axes(ax2)

        divider.add_auto_adjustable_area(use_axes=[ax1], pad=0.1,
                                         adjust_dirs=["left"])
        divider.add_auto_adjustable_area(use_axes=[ax2], pad=0.1,
                                         adjust_dirs=["right"])
        divider.add_auto_adjustable_area(use_axes=[ax1, ax2], pad=0.1,
                                         adjust_dirs=["top", "bottom"])
    
        ax1.set_yticks([0.5])
        ax1.set_yticklabels(["very long label"])

        ax2.set_title("Title")
        ax2.set_xlabel("X - Label")
    
    ex1()
    ex2()
    ex3()

    plt.show()