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Patheffect Demo#
importmatplotlib.pyplotaspltimportnumpyasnpfrommatplotlibimportpatheffectsfig,(ax1,ax2,ax3)=plt.subplots(1,3,figsize=(8,3))ax1.imshow([[1,2],[2,3]])txt=ax1.annotate("test",(1.,1.),(0.,0),arrowprops=dict(arrowstyle="->",connectionstyle="angle3",lw=2),size=20,ha="center",path_effects=[patheffects.withStroke(linewidth=3,foreground="w")])txt.arrow_patch.set_path_effects([patheffects.Stroke(linewidth=5,foreground="w"),patheffects.Normal()])pe=[patheffects.withStroke(linewidth=3,foreground="w")]ax1.grid(True,linestyle="-",path_effects=pe)arr=np.arange(25).reshape((5,5))ax2.imshow(arr)cntr=ax2.contour(arr,colors="k")cntr.set(path_effects=[patheffects.withStroke(linewidth=3,foreground="w")])clbls=ax2.clabel(cntr,fmt="%2.0f",use_clabeltext=True)plt.setp(clbls,path_effects=[patheffects.withStroke(linewidth=3,foreground="w")])# shadow as a path effectp1,=ax3.plot([0,1],[0,1])leg=ax3.legend([p1],["Line 1"],fancybox=True,loc='upper left')leg.legendPatch.set_path_effects([patheffects.withSimplePatchShadow()])plt.show()