I’ve trying to plot some data in a subplot. Even If I define an empty array for ticks or I define labels, always appear a second tick markers in axes.
Here is my code:

    fig2,ax2 = plt.subplots(figsize=(5,4))
    ax2 = fig2.add_subplot(111)
    fig2.subplots_adjust(left=0.07,right=1,top=1,bottom=0.07)
    canvas2 = FigureCanvasTkAgg(fig2, master=FrameDVH)
    canvas2.get_tk_widget().place(x=0,y=0)
    color=['green','red','blue','black','yellow','orange']
    try:
        for d in range(0,len(DVH_TPS[:,0,0])-1):
            ax2.plot(DVH_TPS[d,:,0],DVH_TPS[d,:,1],'-o', markersize=1,color=color[d])
    except Exception:
        pass
    
    ax2.set_yticks([10,20,30,40,50,60,70,80,90,100])
    ax2.set_xticks([dosis*0.2,dosis*0.4,dosis*0.8,dosis,dosis*1.2])
    canvas2.draw()

This is a capture of my result plot:

Even when I define an empty array as ticks:

[